示例#1
0
    def setUp(self):
        self.input = TestInputSingleton.input

        # Framework specific parameters
        self.log_level = self.input.param("log_level", "info").upper()
        self.infra_log_level = self.input.param("infra_log_level",
                                                "error").upper()
        self.skip_setup_cleanup = self.input.param("skip_setup_cleanup", False)
        self.tear_down_while_setup = self.input.param("tear_down_while_setup",
                                                      True)
        self.test_timeout = self.input.param("test_timeout", 3600)
        self.thread_to_use = self.input.param("threads_to_use", 30)
        self.case_number = self.input.param("case_number", 0)
        # End of framework parameters

        # Cluster level info settings
        self.log_info = self.input.param("log_info", None)
        self.log_location = self.input.param("log_location", None)
        self.stat_info = self.input.param("stat_info", None)
        self.port = self.input.param("port", None)
        self.port_info = self.input.param("port_info", None)
        self.servers = self.input.servers
        self.cb_clusters = OrderedDict()
        self.num_servers = self.input.param("servers", len(self.servers))
        self.primary_index_created = False
        self.index_quota_percent = self.input.param("index_quota_percent",
                                                    None)
        self.gsi_type = self.input.param("gsi_type", 'plasma')
        # CBAS setting
        self.jre_path = self.input.param("jre_path", None)
        self.enable_dp = self.input.param("enable_dp", False)
        # End of cluster info parameters

        # Bucket specific params
        self.bucket_type = self.input.param("bucket_type", Bucket.Type.MEMBASE)
        self.bucket_ttl = self.input.param("bucket_ttl", 0)
        self.bucket_size = self.input.param("bucket_size", None)
        self.bucket_conflict_resolution_type = \
            self.input.param("bucket_conflict_resolution",
                             Bucket.ConflictResolution.SEQ_NO)
        self.bucket_replica_index = self.input.param("bucket_replica_index", 1)
        self.bucket_eviction_policy = \
            self.input.param("bucket_eviction_policy",
                             Bucket.EvictionPolicy.VALUE_ONLY)
        self.flush_enabled = self.input.param("flushEnabled",
                                              Bucket.FlushBucket.DISABLED)
        self.bucket_time_sync = self.input.param("bucket_time_sync", False)
        self.standard_buckets = self.input.param("standard_buckets", 1)
        self.num_replicas = self.input.param("replicas", Bucket.ReplicaNum.ONE)
        self.active_resident_threshold = \
            int(self.input.param("active_resident_threshold", 100))
        self.compression_mode = \
            self.input.param("compression_mode",
                             Bucket.CompressionMode.PASSIVE)
        self.bucket_storage = \
            self.input.param("bucket_storage",
                             Bucket.StorageBackend.couchstore)
        if self.bucket_storage == Bucket.StorageBackend.magma:
            self.bucket_eviction_policy = Bucket.EvictionPolicy.FULL_EVICTION

        self.scope_name = self.input.param("scope", CbServer.default_scope)
        self.collection_name = self.input.param("collection",
                                                CbServer.default_collection)
        self.bucket_durability_level = self.input.param(
            "bucket_durability", Bucket.DurabilityLevel.NONE).upper()
        self.bucket_purge_interval = self.input.param("bucket_purge_interval",
                                                      1)
        self.bucket_durability_level = \
            BucketDurability[self.bucket_durability_level]
        # End of bucket parameters

        # Doc specific params
        self.key = self.input.param("key", "test_docs")
        self.key_size = self.input.param("key_size", 8)
        self.doc_size = self.input.param("doc_size", 256)
        self.sub_doc_size = self.input.param("sub_doc_size", 10)
        self.doc_type = self.input.param("doc_type", "json")
        self.num_items = self.input.param("num_items", 100000)
        self.target_vbucket = self.input.param("target_vbucket", None)
        self.maxttl = self.input.param("maxttl", 0)
        self.random_exp = self.input.param("random_exp", False)
        self.randomize_doc_size = self.input.param("randomize_doc_size", False)
        self.randomize_value = self.input.param("randomize_value", False)
        self.rev_write = self.input.param("rev_write", False)
        self.rev_read = self.input.param("rev_read", False)
        self.rev_update = self.input.param("rev_update", False)
        self.rev_del = self.input.param("rev_del", False)
        self.random_key = self.input.param("random_key", False)
        self.mix_key_size = self.input.param("mix_key_size", False)
        # End of doc specific parameters

        # Transactions parameters
        self.transaction_timeout = self.input.param("transaction_timeout", 100)
        self.transaction_commit = self.input.param("transaction_commit", True)
        self.update_count = self.input.param("update_count", 1)
        self.sync = self.input.param("sync", True)
        self.default_bucket = self.input.param("default_bucket", True)
        self.num_buckets = self.input.param("num_buckets", 0)
        self.atomicity = self.input.param("atomicity", False)
        self.defer = self.input.param("defer", False)
        # end of transaction parameters

        # Client specific params
        self.sdk_client_type = self.input.param("sdk_client_type", "java")
        self.replicate_to = self.input.param("replicate_to", 0)
        self.persist_to = self.input.param("persist_to", 0)
        self.sdk_retries = self.input.param("sdk_retries", 5)
        self.sdk_timeout = self.input.param("sdk_timeout", 5)
        self.time_unit = self.input.param("time_unit", "seconds")
        self.durability_level = self.input.param("durability", "").upper()
        self.sdk_client_pool = self.input.param("sdk_client_pool", None)
        self.sdk_pool_capacity = self.input.param("sdk_pool_capacity", 1)
        # Client compression settings
        self.sdk_compression = self.input.param("sdk_compression", None)
        compression_min_ratio = self.input.param("min_ratio", None)
        compression_min_size = self.input.param("min_size", None)
        if type(self.sdk_compression) is bool:
            self.sdk_compression = {"enabled": self.sdk_compression}
            if compression_min_size:
                self.sdk_compression["minSize"] = compression_min_size
            if compression_min_ratio:
                self.sdk_compression["minRatio"] = compression_min_ratio

        # Doc Loader Params
        self.process_concurrency = self.input.param("process_concurrency", 20)
        self.batch_size = self.input.param("batch_size", 2000)
        self.dgm_batch = self.input.param("dgm_batch", 5000)
        self.ryow = self.input.param("ryow", False)
        self.check_persistence = self.input.param("check_persistence", False)
        # End of client specific parameters

        # initial number of items in the cluster
        self.services_init = self.input.param("services_init", None)
        self.nodes_init = self.input.param("nodes_init", 1)
        self.nodes_in = self.input.param("nodes_in", 1)
        self.nodes_out = self.input.param("nodes_out", 1)
        self.services_in = self.input.param("services_in", None)
        self.forceEject = self.input.param("forceEject", False)
        self.wait_timeout = self.input.param("wait_timeout", 120)
        self.verify_unacked_bytes = \
            self.input.param("verify_unacked_bytes", False)
        self.disabled_consistent_view = \
            self.input.param("disabled_consistent_view", None)
        self.rebalanceIndexWaitingDisabled = \
            self.input.param("rebalanceIndexWaitingDisabled", None)
        self.rebalanceIndexPausingDisabled = \
            self.input.param("rebalanceIndexPausingDisabled", None)
        self.maxParallelIndexers = \
            self.input.param("maxParallelIndexers", None)
        self.maxParallelReplicaIndexers = \
            self.input.param("maxParallelReplicaIndexers", None)
        self.quota_percent = self.input.param("quota_percent", 90)
        self.skip_buckets_handle = self.input.param("skip_buckets_handle",
                                                    False)

        # SDKClientPool object for creating generic clients across tasks
        if self.sdk_client_pool is True:
            self.init_sdk_pool_object()

        # Initiate logging variables
        self.log = logger.get("test")
        self.infra_log = logger.get("infra")

        self.cleanup_pcaps()
        self.collect_pcaps = self.input.param("collect_pcaps", False)
        if self.collect_pcaps:
            self.start_collect_pcaps()

        # variable for log collection using cbCollect
        self.get_cbcollect_info = self.input.param("get-cbcollect-info", False)

        # Variable for initializing the current (start of test) timestamp
        self.start_timestamp = datetime.now()
        '''
        Be careful while using this flag.
        This is only and only for stand-alone tests.
        During bugs reproductions, when a crash is seen
        stop_server_on_crash will stop the server
        so that we can collect data/logs/dumps at the right time
        '''
        self.stop_server_on_crash = self.input.param("stop_server_on_crash",
                                                     False)
        self.collect_data = self.input.param("collect_data", False)

        # Configure loggers
        self.log.setLevel(self.log_level)
        self.infra_log.setLevel(self.infra_log_level)

        # Support lib objects for testcase execution
        self.task_manager = TaskManager(self.thread_to_use)
        self.task = ServerTasks(self.task_manager)
        # End of library object creation

        self.sleep = sleep

        self.cleanup = False
        self.nonroot = False
        self.test_failure = None
        self.crash_warning = self.input.param("crash_warning", False)
        self.summary = TestSummary(self.log)

        # Populate memcached_port in case of cluster_run
        cluster_run_base_port = ClusterRun.port
        if int(self.input.servers[0].port) == ClusterRun.port:
            for server in self.input.servers:
                server.port = cluster_run_base_port
                cluster_run_base_port += 1
                # If not defined in node.ini under 'memcached_port' section
                if server.memcached_port is CbServer.memcached_port:
                    server.memcached_port = \
                        ClusterRun.memcached_port \
                        + (2 * (int(server.port) - ClusterRun.port))

        self.log_setup_status(self.__class__.__name__, "started")
        cluster_name_format = "C%s"
        default_cluster_index = counter_index = 1
        if len(self.input.clusters) > 1:
            # Multi cluster setup
            for _, nodes in self.input.clusters.iteritems():
                cluster_name = cluster_name_format % counter_index
                tem_cluster = CBCluster(name=cluster_name, servers=nodes)
                self.cb_clusters[cluster_name] = tem_cluster
                counter_index += 1
        else:
            # Single cluster
            cluster_name = cluster_name_format % counter_index
            self.cb_clusters[cluster_name] = CBCluster(name=cluster_name,
                                                       servers=self.servers)

        # Initialize self.cluster with first available cluster as default
        self.cluster = self.cb_clusters[cluster_name_format %
                                        default_cluster_index]
        self.cluster_util = ClusterUtils(self.cluster, self.task_manager)
        self.bucket_util = BucketUtils(self.cluster_util, self.task)

        if self.standard_buckets > 10:
            self.bucket_util.change_max_buckets(self.cluster.master,
                                                self.standard_buckets)

        for cluster_name, cluster in self.cb_clusters.items():
            shell = RemoteMachineShellConnection(cluster.master)
            self.os_info = shell.extract_remote_info().type.lower()
            if self.os_info != 'windows':
                if cluster.master.ssh_username != "root":
                    self.nonroot = True
                    shell.disconnect()
                    break
            shell.disconnect()
        """ some tests need to bypass checking cb server at set up
            to run installation """
        self.skip_init_check_cbserver = \
            self.input.param("skip_init_check_cbserver", False)

        try:
            if self.skip_setup_cleanup:
                self.cluster.buckets = self.bucket_util.get_all_buckets(
                    self.cluster)
                return
            self.services_map = None

            self.log_setup_status("BaseTestCase", "started")
            for cluster_name, cluster in self.cb_clusters.items():
                if not self.skip_buckets_handle \
                        and not self.skip_init_check_cbserver:
                    self.log.debug("Cleaning up cluster")
                    cluster_util = ClusterUtils(cluster, self.task_manager)
                    bucket_util = BucketUtils(cluster_util, self.task)
                    cluster_util.cluster_cleanup(bucket_util)

            # Avoid cluster operations in setup for new upgrade / upgradeXDCR
            if str(self.__class__).find('newupgradetests') != -1 or \
                    str(self.__class__).find('upgradeXDCR') != -1 or \
                    str(self.__class__).find('Upgrade_EpTests') != -1 or \
                    self.skip_buckets_handle:
                self.log.warning("Cluster operation in setup will be skipped")
                self.primary_index_created = True
                self.log_setup_status("BaseTestCase", "finished")
                return
            # avoid clean up if the previous test has been tear down
            if self.case_number == 1 or self.case_number > 1000:
                if self.case_number > 1000:
                    self.log.warn("TearDown for prev test failed. Will retry")
                    self.case_number -= 1000
                self.cleanup = True
                if not self.skip_init_check_cbserver:
                    self.tearDownEverything()
                    self.tear_down_while_setup = False
            if not self.skip_init_check_cbserver:
                for cluster_name, cluster in self.cb_clusters.items():
                    self.log.info("Initializing cluster")
                    cluster_util = ClusterUtils(cluster, self.task_manager)
                    cluster_util.reset_cluster()
                    master_services = cluster_util.get_services(
                        cluster.servers[:1], self.services_init, start_node=0)
                    if master_services is not None:
                        master_services = master_services[0].split(",")

                    self.quota = self._initialize_nodes(
                        self.task,
                        cluster,
                        self.disabled_consistent_view,
                        self.rebalanceIndexWaitingDisabled,
                        self.rebalanceIndexPausingDisabled,
                        self.maxParallelIndexers,
                        self.maxParallelReplicaIndexers,
                        self.port,
                        self.quota_percent,
                        services=master_services)

                    cluster_util.change_env_variables()
                    cluster_util.change_checkpoint_params()
                    self.log.info("{0} initialized".format(cluster))
            else:
                self.quota = ""

            # Enable dp_version since we need collections enabled
            if self.enable_dp:
                for server in self.cluster.servers:
                    shell_conn = RemoteMachineShellConnection(server)
                    cb_cli = CbCli(shell_conn)
                    cb_cli.enable_dp()
                    shell_conn.disconnect()

            for cluster_name, cluster in self.cb_clusters.items():
                cluster_util = ClusterUtils(cluster, self.task_manager)
                if self.log_info:
                    cluster_util.change_log_info()
                if self.log_location:
                    cluster_util.change_log_location()
                if self.stat_info:
                    cluster_util.change_stat_info()
                if self.port_info:
                    cluster_util.change_port_info()
                if self.port:
                    self.port = str(self.port)

            self.log_setup_status("BaseTestCase", "finished")

            if not self.skip_init_check_cbserver:
                self.__log("started")
        except Exception as e:
            traceback.print_exc()
            self.task.shutdown(force=True)
            self.fail(e)
示例#2
0
    def tearDownEverything(self):
        if self.skip_setup_cleanup:
            return
        for cluster in self.__cb_clusters:
            cluster_util = ClusterUtils(cluster, self.task_manager)
            bucket_util = BucketUtils(cluster, cluster_util, self.task)
            try:
                if hasattr(self,
                           'skip_buckets_handle') and self.skip_buckets_handle:
                    return
                test_failed = (hasattr(self, '_resultForDoCleanups') and
                               len(self._resultForDoCleanups.failures or
                                   self._resultForDoCleanups.errors)) or \
                              (hasattr(self, '_exc_info') and \
                               self._exc_info()[1] is not None)

                if test_failed and TestInputSingleton.input.param("stop-on-failure", False) \
                        or self.input.param("skip_cleanup", False):
                    self.log.warn("CLEANUP WAS SKIPPED")
                else:
                    if test_failed:
                        # collect logs here because we have not shut things down
                        if TestInputSingleton.input.param(
                                "get-cbcollect-info", False):
                            self.fetch_cb_collect_logs()

                        if TestInputSingleton.input.param('get_trace', None):
                            for server in cluster.servers:
                                try:
                                    shell = RemoteMachineShellConnection(
                                        server)
                                    output, _ = shell.execute_command(
                                        "ps -aef|grep %s" %
                                        TestInputSingleton.input.param(
                                            'get_trace', None))
                                    output = shell.execute_command(
                                        "pstack %s" %
                                        output[0].split()[1].strip())
                                    self.infra_log.debug(output[0])
                                    shell.disconnect()
                                except:
                                    pass
                        else:
                            self.log.critical("Skipping get_trace !!")

                    rest = RestConnection(cluster.master)
                    alerts = rest.get_alerts()
                    if alerts is not None and len(alerts) != 0:
                        self.infra_log.warn("Alerts found: {0}".format(alerts))
                    self.log.debug("Cleaning up cluster")
                    cluster_util.cluster_cleanup(bucket_util)
            except BaseException as e:
                # kill memcached
                traceback.print_exc()
                self.log.warning("Killing memcached due to {0}".format(e))
                cluster_util.kill_memcached()
                # increase case_number to retry tearDown in setup for the next test
                self.case_number += 1000
            finally:
                if not self.input.param("skip_cleanup", False):
                    cluster_util.reset_cluster()
                # stop all existing task manager threads
                if self.cleanup:
                    self.cleanup = False
                else:
                    cluster_util.reset_env_variables()
        self.infra_log.info("========== tasks in thread pool ==========")
        self.task_manager.print_tasks_in_pool()
        self.infra_log.info("==========================================")
        if not self.tear_down_while_setup:
            self.task_manager.shutdown_task_manager()
            self.task.shutdown(force=True)
示例#3
0
class BaseTestCase(unittest.TestCase):
    def setUp(self):
        self.input = TestInputSingleton.input

        # Framework specific parameters
        self.log_level = self.input.param("log_level", "info").upper()
        self.infra_log_level = self.input.param("infra_log_level",
                                                "error").upper()
        self.skip_setup_cleanup = self.input.param("skip_setup_cleanup", False)
        self.tear_down_while_setup = self.input.param("tear_down_while_setup",
                                                      True)
        self.test_timeout = self.input.param("test_timeout", 3600)
        self.thread_to_use = self.input.param("threads_to_use", 30)
        self.case_number = self.input.param("case_number", 0)
        # End of framework parameters

        # Cluster level info settings
        self.log_info = self.input.param("log_info", None)
        self.log_location = self.input.param("log_location", None)
        self.stat_info = self.input.param("stat_info", None)
        self.port = self.input.param("port", None)
        self.port_info = self.input.param("port_info", None)
        self.servers = self.input.servers
        self.cb_clusters = OrderedDict()
        self.num_servers = self.input.param("servers", len(self.servers))
        self.vbuckets = self.input.param("vbuckets", CbServer.total_vbuckets)
        self.primary_index_created = False
        self.index_quota_percent = self.input.param("index_quota_percent",
                                                    None)
        self.gsi_type = self.input.param("gsi_type", 'plasma')
        # CBAS setting
        self.jre_path = self.input.param("jre_path", None)
        self.enable_dp = self.input.param("enable_dp", False)
        # End of cluster info parameters

        # Bucket specific params
        self.bucket_type = self.input.param("bucket_type", Bucket.Type.MEMBASE)
        self.bucket_ttl = self.input.param("bucket_ttl", 0)
        self.bucket_size = self.input.param("bucket_size", None)
        self.bucket_conflict_resolution_type = \
            self.input.param("bucket_conflict_resolution",
                             Bucket.ConflictResolution.SEQ_NO)
        self.bucket_replica_index = self.input.param("bucket_replica_index", 1)
        self.bucket_eviction_policy = \
            self.input.param("bucket_eviction_policy",
                             Bucket.EvictionPolicy.VALUE_ONLY)
        self.flush_enabled = self.input.param("flushEnabled",
                                              Bucket.FlushBucket.DISABLED)
        self.bucket_time_sync = self.input.param("bucket_time_sync", False)
        self.standard_buckets = self.input.param("standard_buckets", 1)
        self.num_replicas = self.input.param("replicas", Bucket.ReplicaNum.ONE)
        self.active_resident_threshold = \
            int(self.input.param("active_resident_threshold", 100))
        self.compression_mode = \
            self.input.param("compression_mode",
                             Bucket.CompressionMode.PASSIVE)
        self.bucket_storage = \
            self.input.param("bucket_storage",
                             Bucket.StorageBackend.couchstore)
        if self.bucket_storage == Bucket.StorageBackend.magma:
            self.bucket_eviction_policy = Bucket.EvictionPolicy.FULL_EVICTION

        self.scope_name = self.input.param("scope", CbServer.default_scope)
        self.collection_name = self.input.param("collection",
                                                CbServer.default_collection)
        self.bucket_durability_level = self.input.param(
            "bucket_durability", Bucket.DurabilityLevel.NONE).upper()
        self.bucket_purge_interval = self.input.param("bucket_purge_interval",
                                                      1)
        self.bucket_durability_level = \
            BucketDurability[self.bucket_durability_level]
        # End of bucket parameters

        # Doc specific params
        self.key = self.input.param("key", "test_docs")
        self.key_size = self.input.param("key_size", 8)
        self.doc_size = self.input.param("doc_size", 256)
        self.sub_doc_size = self.input.param("sub_doc_size", 10)
        self.doc_type = self.input.param("doc_type", "json")
        self.num_items = self.input.param("num_items", 100000)
        self.target_vbucket = self.input.param("target_vbucket", None)
        self.maxttl = self.input.param("maxttl", 0)
        self.random_exp = self.input.param("random_exp", False)
        self.randomize_doc_size = self.input.param("randomize_doc_size", False)
        self.randomize_value = self.input.param("randomize_value", False)
        self.rev_write = self.input.param("rev_write", False)
        self.rev_read = self.input.param("rev_read", False)
        self.rev_update = self.input.param("rev_update", False)
        self.rev_del = self.input.param("rev_del", False)
        self.random_key = self.input.param("random_key", False)
        self.mix_key_size = self.input.param("mix_key_size", False)
        # End of doc specific parameters

        # Transactions parameters
        self.transaction_timeout = self.input.param("transaction_timeout", 100)
        self.transaction_commit = self.input.param("transaction_commit", True)
        self.update_count = self.input.param("update_count", 1)
        self.sync = self.input.param("sync", True)
        self.default_bucket = self.input.param("default_bucket", True)
        self.num_buckets = self.input.param("num_buckets", 0)
        self.atomicity = self.input.param("atomicity", False)
        self.defer = self.input.param("defer", False)
        # end of transaction parameters

        # Client specific params
        self.sdk_client_type = self.input.param("sdk_client_type", "java")
        self.replicate_to = self.input.param("replicate_to", 0)
        self.persist_to = self.input.param("persist_to", 0)
        self.sdk_retries = self.input.param("sdk_retries", 5)
        self.sdk_timeout = self.input.param("sdk_timeout", 5)
        self.time_unit = self.input.param("time_unit", "seconds")
        self.durability_level = self.input.param("durability", "").upper()
        self.sdk_client_pool = self.input.param("sdk_client_pool", None)
        self.sdk_pool_capacity = self.input.param("sdk_pool_capacity", 1)
        # Client compression settings
        self.sdk_compression = self.input.param("sdk_compression", None)
        compression_min_ratio = self.input.param("min_ratio", None)
        compression_min_size = self.input.param("min_size", None)
        if type(self.sdk_compression) is bool:
            self.sdk_compression = {"enabled": self.sdk_compression}
            if compression_min_size:
                self.sdk_compression["minSize"] = compression_min_size
            if compression_min_ratio:
                self.sdk_compression["minRatio"] = compression_min_ratio

        # Doc Loader Params
        self.process_concurrency = self.input.param("process_concurrency", 20)
        self.batch_size = self.input.param("batch_size", 2000)
        self.dgm_batch = self.input.param("dgm_batch", 5000)
        self.ryow = self.input.param("ryow", False)
        self.check_persistence = self.input.param("check_persistence", False)
        # End of client specific parameters

        # initial number of items in the cluster
        self.services_init = self.input.param("services_init", None)
        self.nodes_init = self.input.param("nodes_init", 1)
        self.nodes_in = self.input.param("nodes_in", 1)
        self.nodes_out = self.input.param("nodes_out", 1)
        self.services_in = self.input.param("services_in", None)
        self.forceEject = self.input.param("forceEject", False)
        self.wait_timeout = self.input.param("wait_timeout", 120)
        self.verify_unacked_bytes = \
            self.input.param("verify_unacked_bytes", False)
        self.disabled_consistent_view = \
            self.input.param("disabled_consistent_view", None)
        self.rebalanceIndexWaitingDisabled = \
            self.input.param("rebalanceIndexWaitingDisabled", None)
        self.rebalanceIndexPausingDisabled = \
            self.input.param("rebalanceIndexPausingDisabled", None)
        self.maxParallelIndexers = \
            self.input.param("maxParallelIndexers", None)
        self.maxParallelReplicaIndexers = \
            self.input.param("maxParallelReplicaIndexers", None)
        self.quota_percent = self.input.param("quota_percent", 90)
        self.skip_buckets_handle = self.input.param("skip_buckets_handle",
                                                    False)

        # SDKClientPool object for creating generic clients across tasks
        if self.sdk_client_pool is True:
            self.init_sdk_pool_object()

        # Initiate logging variables
        self.log = logger.get("test")
        self.infra_log = logger.get("infra")

        self.cleanup_pcaps()
        self.collect_pcaps = self.input.param("collect_pcaps", False)
        if self.collect_pcaps:
            self.start_collect_pcaps()

        # variable for log collection using cbCollect
        self.get_cbcollect_info = self.input.param("get-cbcollect-info", False)

        # Variable for initializing the current (start of test) timestamp
        self.start_timestamp = datetime.now()
        '''
        Be careful while using this flag.
        This is only and only for stand-alone tests.
        During bugs reproductions, when a crash is seen
        stop_server_on_crash will stop the server
        so that we can collect data/logs/dumps at the right time
        '''
        self.stop_server_on_crash = self.input.param("stop_server_on_crash",
                                                     False)
        self.collect_data = self.input.param("collect_data", False)

        # Configure loggers
        self.log.setLevel(self.log_level)
        self.infra_log.setLevel(self.infra_log_level)

        # Support lib objects for testcase execution
        self.task_manager = TaskManager(self.thread_to_use)
        self.task = ServerTasks(self.task_manager)
        # End of library object creation

        self.sleep = sleep

        self.cleanup = False
        self.nonroot = False
        self.test_failure = None
        self.crash_warning = self.input.param("crash_warning", False)
        self.summary = TestSummary(self.log)

        # Populate memcached_port in case of cluster_run
        cluster_run_base_port = ClusterRun.port
        if int(self.input.servers[0].port) == ClusterRun.port:
            for server in self.input.servers:
                server.port = cluster_run_base_port
                cluster_run_base_port += 1
                # If not defined in node.ini under 'memcached_port' section
                if server.memcached_port is CbServer.memcached_port:
                    server.memcached_port = \
                        ClusterRun.memcached_port \
                        + (2 * (int(server.port) - ClusterRun.port))

        self.log_setup_status(self.__class__.__name__, "started")
        cluster_name_format = "C%s"
        default_cluster_index = counter_index = 1
        if len(self.input.clusters) > 1:
            # Multi cluster setup
            for _, nodes in self.input.clusters.iteritems():
                cluster_name = cluster_name_format % counter_index
                tem_cluster = CBCluster(name=cluster_name,
                                        servers=nodes,
                                        vbuckets=self.vbuckets)
                self.cb_clusters[cluster_name] = tem_cluster
                counter_index += 1
        else:
            # Single cluster
            cluster_name = cluster_name_format % counter_index
            self.cb_clusters[cluster_name] = CBCluster(name=cluster_name,
                                                       servers=self.servers,
                                                       vbuckets=self.vbuckets)

        # Initialize self.cluster with first available cluster as default
        self.cluster = self.cb_clusters[cluster_name_format %
                                        default_cluster_index]
        self.cluster_util = ClusterUtils(self.task_manager)
        self.bucket_util = BucketUtils(self.cluster_util, self.task)

        if self.standard_buckets > 10:
            self.bucket_util.change_max_buckets(self.cluster.master,
                                                self.standard_buckets)

        for cluster_name, cluster in self.cb_clusters.items():
            shell = RemoteMachineShellConnection(cluster.master)
            self.os_info = shell.extract_remote_info().type.lower()
            if self.os_info != 'windows':
                if cluster.master.ssh_username != "root":
                    self.nonroot = True
                    shell.disconnect()
                    break
            shell.disconnect()
        """ some tests need to bypass checking cb server at set up
            to run installation """
        self.skip_init_check_cbserver = \
            self.input.param("skip_init_check_cbserver", False)

        try:
            if self.skip_setup_cleanup:
                self.cluster.buckets = self.bucket_util.get_all_buckets(
                    self.cluster)
                return
            self.services_map = None

            self.log_setup_status("BaseTestCase", "started")
            for cluster_name, cluster in self.cb_clusters.items():
                if not self.skip_buckets_handle \
                        and not self.skip_init_check_cbserver:
                    self.log.debug("Cleaning up cluster")
                    self.cluster_util.cluster_cleanup(cluster,
                                                      self.bucket_util)

            # Avoid cluster operations in setup for new upgrade / upgradeXDCR
            if str(self.__class__).find('newupgradetests') != -1 or \
                    str(self.__class__).find('upgradeXDCR') != -1 or \
                    str(self.__class__).find('Upgrade_EpTests') != -1 or \
                    self.skip_buckets_handle:
                self.log.warning("Cluster operation in setup will be skipped")
                self.primary_index_created = True
                self.log_setup_status("BaseTestCase", "finished")
                return
            # avoid clean up if the previous test has been tear down
            if self.case_number == 1 or self.case_number > 1000:
                if self.case_number > 1000:
                    self.log.warn("TearDown for prev test failed. Will retry")
                    self.case_number -= 1000
                self.cleanup = True
                if not self.skip_init_check_cbserver:
                    self.tearDownEverything()
                    self.tear_down_while_setup = False
            if not self.skip_init_check_cbserver:
                for cluster_name, cluster in self.cb_clusters.items():
                    self.initialize_cluster(cluster_name,
                                            cluster,
                                            services=None)
            else:
                self.quota = ""

            # Enable dp_version since we need collections enabled
            if self.enable_dp:
                for server in self.cluster.servers:
                    shell_conn = RemoteMachineShellConnection(server)
                    cb_cli = CbCli(shell_conn)
                    cb_cli.enable_dp()
                    shell_conn.disconnect()

            for cluster_name, cluster in self.cb_clusters.items():
                self.modify_cluster_settings(cluster)

            self.log_setup_status("BaseTestCase", "finished")

            if not self.skip_init_check_cbserver:
                self.__log("started")
        except Exception as e:
            traceback.print_exc()
            self.task.shutdown(force=True)
            self.fail(e)

    def initialize_cluster(self, cluster_name, cluster, services=None):
        self.log.info("Initializing cluster : {0}".format(cluster_name))
        self.cluster_util.reset_cluster(cluster)
        if not services:
            master_services = self.cluster_util.get_services(
                cluster.servers[:1], self.services_init, start_node=0)
        else:
            master_services = self.cluster_util.get_services(
                cluster.servers[:1], services, start_node=0)
        if master_services is not None:
            master_services = master_services[0].split(",")

        self.quota = self._initialize_nodes(self.task,
                                            cluster,
                                            self.disabled_consistent_view,
                                            self.rebalanceIndexWaitingDisabled,
                                            self.rebalanceIndexPausingDisabled,
                                            self.maxParallelIndexers,
                                            self.maxParallelReplicaIndexers,
                                            self.port,
                                            self.quota_percent,
                                            services=master_services)

        self.cluster_util.change_env_variables(cluster)
        self.cluster_util.change_checkpoint_params(cluster)
        self.log.info("Cluster %s initialized" % cluster_name)

    def modify_cluster_settings(self, cluster):
        if self.log_info:
            self.cluster_util.change_log_info(cluster, self.log_info)
        if self.log_location:
            self.cluster_util.change_log_location(cluster, self.log_location)
        if self.stat_info:
            self.cluster_util.change_stat_info(cluster, self.stat_info)
        if self.port_info:
            self.cluster_util.change_port_info(cluster, self.port_info)
        if self.port:
            self.port = str(self.port)

    def cleanup_pcaps(self):
        for server in self.servers:
            shell = RemoteMachineShellConnection(server)
            # Stop old instances of tcpdump if still running
            stop_tcp_cmd = "if [[ \"$(pgrep tcpdump)\" ]]; " \
                           "then kill -s TERM $(pgrep tcpdump); fi"
            _, _ = shell.execute_command(stop_tcp_cmd)
            shell.execute_command("rm -rf pcaps")
            shell.execute_command("rm -rf " + server.ip + "_pcaps.zip")
            shell.disconnect()

    def start_collect_pcaps(self):
        for server in self.servers:
            shell = RemoteMachineShellConnection(server)
            # Create path for storing pcaps
            create_path = "mkdir -p pcaps"
            o, e = shell.execute_command(create_path)
            shell.log_command_output(o, e)
            # Install tcpdump command if it doesn't exist
            o, e = shell.execute_command("yum install -y tcpdump")
            shell.log_command_output(o, e)
            # Install screen command if it doesn't exist
            o, e = shell.execute_command("yum install -y screen")
            shell.log_command_output(o, e)
            # Execute the tcpdump command
            tcp_cmd = "screen -dmS test bash -c \"tcpdump -C 500 -W 10 " \
                      "-w pcaps/pack-dump-file.pcap  -i eth0 -s 0 tcp\""
            o, e = shell.execute_command(tcp_cmd)
            shell.log_command_output(o, e)
            shell.disconnect()

    def start_fetch_pcaps(self):
        log_path = TestInputSingleton.input.param("logs_folder", "/tmp")
        for server in self.servers:
            remote_client = RemoteMachineShellConnection(server)
            # stop tcdump
            stop_tcp_cmd = "if [[ \"$(pgrep tcpdump)\" ]]; " \
                           "then kill -s TERM $(pgrep tcpdump); fi"
            o, e = remote_client.execute_command(stop_tcp_cmd)
            remote_client.log_command_output(o, e)
            if self.is_test_failed():
                # install zip unzip
                o, e = remote_client.execute_command(
                    "yum install -y zip unzip")
                remote_client.log_command_output(o, e)
                # zip the pcaps folder
                zip_cmd = "zip -r " + server.ip + "_pcaps.zip pcaps"
                o, e = remote_client.execute_command(zip_cmd)
                remote_client.log_command_output(o, e)
                # transfer the zip file
                zip_file_copied = remote_client.get_file(
                    "/root", os.path.basename(server.ip + "_pcaps.zip"),
                    log_path)
                self.log.info("%s node pcap zip copied on client : %s" %
                              (server.ip, zip_file_copied))
                if zip_file_copied:
                    # Remove the zips
                    remote_client.execute_command("rm -rf " + server.ip +
                                                  "_pcaps.zip")
            # Remove pcaps
            remote_client.execute_command("rm -rf pcaps")
            remote_client.disconnect()

    def tearDown(self):
        self.task_manager.shutdown_task_manager()
        self.task.shutdown(force=True)
        self.task_manager.abort_all_tasks()
        if self.sdk_client_pool:
            self.sdk_client_pool.shutdown()
        if self.collect_pcaps:
            self.log.info("Starting Pcaps collection!!")
            self.start_fetch_pcaps()
        result = self.check_coredump_exist(self.servers, force_collect=True)
        self.tearDownEverything()
        if not self.crash_warning:
            self.assertFalse(result, msg="Cb_log file validation failed")
        if self.crash_warning and result:
            self.log.warn("CRASH | CRITICAL | WARN messages found in cb_logs")

    def tearDownEverything(self):
        if self.skip_setup_cleanup:
            return
        for _, cluster in self.cb_clusters.items():
            try:
                if self.skip_buckets_handle:
                    return
                test_failed = self.is_test_failed()
                if test_failed \
                        and TestInputSingleton.input.param("stop-on-failure",
                                                           False) \
                        or self.input.param("skip_cleanup", False):
                    self.log.warn("CLEANUP WAS SKIPPED")
                else:
                    if test_failed:
                        # Collect logs because we have not shut things down
                        if self.get_cbcollect_info:
                            self.fetch_cb_collect_logs()

                        get_trace = \
                            TestInputSingleton.input.param("get_trace", None)
                        if get_trace:
                            for server in cluster.servers:
                                shell = \
                                    RemoteMachineShellConnection(server)
                                output, _ = shell.execute_command(
                                    "ps -aef|grep %s" % get_trace)
                                output = shell.execute_command(
                                    "pstack %s" % output[0].split()[1].strip())
                                self.infra_log.debug(output[0])
                                shell.disconnect()
                        else:
                            self.log.critical("Skipping get_trace !!")

                    rest = RestConnection(cluster.master)
                    alerts = rest.get_alerts()
                    if alerts is not None and len(alerts) != 0:
                        self.infra_log.warn("Alerts found: {0}".format(alerts))
                    self.log.debug("Cleaning up cluster")
                    self.cluster_util.cluster_cleanup(cluster,
                                                      self.bucket_util)
            except BaseException as e:
                # kill memcached
                traceback.print_exc()
                self.log.warning("Killing memcached due to {0}".format(e))
                self.cluster_util.kill_memcached(cluster)
                # Increase case_number to retry tearDown in setup for next test
                self.case_number += 1000
            finally:
                # stop all existing task manager threads
                if self.cleanup:
                    self.cleanup = False
                else:
                    self.cluster_util.reset_env_variables(cluster)
        self.infra_log.info("========== tasks in thread pool ==========")
        self.task_manager.print_tasks_in_pool()
        self.infra_log.info("==========================================")
        if not self.tear_down_while_setup:
            self.task_manager.shutdown_task_manager()
            self.task.shutdown(force=True)

    def is_test_failed(self):
        return (hasattr(self, '_resultForDoCleanups')
                and len(self._resultForDoCleanups.failures
                or self._resultForDoCleanups.errors)) \
               or (hasattr(self, '_exc_info')
                   and self._exc_info()[1] is not None)

    def handle_setup_exception(self, exception_obj):
        # Shutdown client pool in case of any error before failing
        if self.sdk_client_pool is not None:
            self.sdk_client_pool.shutdown()
        # print the tracback of the failure
        traceback.print_exc()
        # Throw the exception so that the test will fail at setUp
        raise exception_obj

    def __log(self, status):
        try:
            msg = "{0}: {1} {2}" \
                .format(datetime.now(), self._testMethodName, status)
            RestConnection(self.servers[0]).log_client_error(msg)
        except Exception as e:
            self.log.warning("Exception during REST log_client_error: %s" % e)

    def log_setup_status(self, class_name, status, stage="setup"):
        self.log.info("========= %s %s %s for test #%d %s =========" %
                      (class_name, stage, status, self.case_number,
                       self._testMethodName))

    def _initialize_nodes(self,
                          task,
                          cluster,
                          disabled_consistent_view=None,
                          rebalance_index_waiting_disabled=None,
                          rebalance_index_pausing_disabled=None,
                          max_parallel_indexers=None,
                          max_parallel_replica_indexers=None,
                          port=None,
                          quota_percent=None,
                          services=None):
        quota = 0
        init_tasks = []
        ssh_sessions = dict()

        # Open ssh_connections for command execution
        for server in cluster.servers:
            ssh_sessions[server.ip] = RemoteMachineShellConnection(server)

        for server in cluster.servers:
            # Make sure that data_and index_path are writable by couchbase user
            if not server.index_path:
                server.index_path = server.data_path
            for path in set(
                [_f for _f in [server.data_path, server.index_path] if _f]):
                for cmd in ("rm -rf {0}/*".format(path),
                            "chown -R couchbase:couchbase {0}".format(path)):
                    ssh_sessions[server.ip].execute_command(cmd)
                rest = RestConnection(server)
                rest.set_data_path(data_path=server.data_path,
                                   index_path=server.index_path,
                                   cbas_path=server.cbas_path)
            init_port = port or server.port or '8091'
            assigned_services = services
            if cluster.master != server:
                assigned_services = None
            init_tasks.append(
                task.async_init_node(
                    server,
                    disabled_consistent_view,
                    rebalance_index_waiting_disabled,
                    rebalance_index_pausing_disabled,
                    max_parallel_indexers,
                    max_parallel_replica_indexers,
                    init_port,
                    quota_percent,
                    services=assigned_services,
                    index_quota_percent=self.index_quota_percent,
                    gsi_type=self.gsi_type))
        for _task in init_tasks:
            node_quota = self.task_manager.get_task_result(_task)
            if node_quota < quota or quota == 0:
                quota = node_quota
        if quota < 100 and not len(set([server.ip
                                        for server in self.servers])) == 1:
            self.log.warn("RAM quota was defined less than 100 MB:")
            for server in cluster.servers:
                ram = ssh_sessions[server.ip].extract_remote_info().ram
                self.log.debug("Node: {0}: RAM: {1}".format(server.ip, ram))

        # Close all ssh_connections
        for server in cluster.servers:
            ssh_sessions[server.ip].disconnect()

        if self.jre_path:
            for server in cluster.servers:
                rest = RestConnection(server)
                rest.set_jre_path(self.jre_path)
        return quota

    def fetch_cb_collect_logs(self):
        log_path = TestInputSingleton.input.param("logs_folder", "/tmp")
        is_single_node_server = len(self.servers) == 1
        for _, cluster in self.cb_clusters.items():
            rest = RestConnection(cluster.master)
            nodes = rest.get_nodes()
            # Creating cluster_util object to handle multi_cluster scenario
            status = self.cluster_util.trigger_cb_collect_on_cluster(
                rest, nodes, is_single_node_server)

            if status is True:
                self.cluster_util.wait_for_cb_collect_to_complete(rest)
                self.cluster_util.copy_cb_collect_logs(rest, nodes, cluster,
                                                       log_path)
            else:
                self.log.error("API perform_cb_collect returned False")

    def log_failure(self, message):
        self.log.error(message)
        self.summary.set_status("FAILED")
        if self.test_failure is None:
            self.test_failure = message

    def validate_test_failure(self):
        if self.test_failure is not None:
            self.fail(self.test_failure)

    def get_clusters(self):
        return [self.cb_clusters[name] for name in self.cb_clusters.keys()]

    def get_task(self):
        return self.task

    def get_task_mgr(self):
        return self.task_manager

    def init_sdk_pool_object(self):
        self.sdk_client_pool = SDKClientPool()
        DocLoaderUtils.sdk_client_pool = self.sdk_client_pool

    def check_coredump_exist(self, servers, force_collect=False):
        bin_cb = "/opt/couchbase/bin/"
        lib_cb = "/opt/couchbase/var/lib/couchbase/"
        # crash_dir = "/opt/couchbase/var/lib/couchbase/"
        crash_dir_win = "c://CrashDumps"
        result = False
        self.data_sets = dict()

        def find_index_of(str_list, sub_string):
            for i in range(len(str_list)):
                if sub_string in str_list[i]:
                    return i
            return -1

        def get_gdb(gdb_shell, dmp_path, dmp_name):
            dmp_file = dmp_path + dmp_name
            core_file = dmp_path + dmp_name.strip(".dmp") + ".core"
            gdb_shell.execute_command("rm -rf " + core_file)
            core_cmd = "/" + bin_cb + "minidump-2-core " + dmp_file + " > " + core_file
            print("running: %s" % core_cmd)
            gdb_shell.execute_command(core_cmd)
            gdb = "gdb --batch {} -c {} -ex \"bt full\" -ex quit"\
                .format(os.path.join(bin_cb, "memcached"), core_file)
            print("running: %s" % gdb)
            result = gdb_shell.execute_command(gdb)[0]
            t_index = find_index_of(result, "Core was generated by")
            result = result[t_index:]
            result = " ".join(result)
            return result

        def get_full_thread_dump(shell):
            cmd = 'gdb -p `(pidof memcached)` -ex "thread apply all bt" -ex detach -ex quit'
            print("running: %s" % cmd)
            thread_dump = shell.execute_command(cmd)[0]
            index = find_index_of(
                thread_dump, "Thread debugging using libthread_db enabled")
            result = " ".join(thread_dump[index:])
            return result

        def run_cbanalyze_core(shell, core_file):
            cbanalyze_core = os.path.join(bin_cb, "tools/cbanalyze-core")
            cmd = '%s %s' % (cbanalyze_core, core_file)
            print("running: %s" % cmd)
            shell.execute_command(cmd)[0]
            cbanalyze_log = core_file + ".log"
            if shell.file_exists(os.path.dirname(cbanalyze_log),
                                 os.path.basename(cbanalyze_log)):
                log_path = TestInputSingleton.input.param(
                    "logs_folder", "/tmp")
                shell.get_file(os.path.dirname(cbanalyze_log),
                               os.path.basename(cbanalyze_log), log_path)

        def check_logs(grep_output_list):
            """
            Check the grep's last line for the latest timestamp.
            If this timestamp < start_timestamp of the test,
            then return False (as the grep's output is from previous tests)
            Note: This method works only if slave's time(timezone) matches
                  that of VM's. Else it won't be possible to compare timestamps
            """
            last_line = grep_output_list[-1]
            # eg: 2021-07-12T04:03:45
            timestamp_regex = re.compile(
                r"\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}")
            match_obj = timestamp_regex.search(last_line)
            if not match_obj:
                self.log.critical("%s does not match any timestamp" %
                                  last_line)
                return True
            timestamp = match_obj.group()
            timestamp = datetime.strptime(timestamp, "%Y-%m-%dT%H:%M:%S")
            self.log.info("Comparing timestamps: Log's latest timestamp: %s, "
                          "Test's start timestamp is %s" %
                          (timestamp, self.start_timestamp))
            if timestamp > self.start_timestamp:
                return True
            else:
                return False

        for idx, server in enumerate(servers):
            shell = RemoteMachineShellConnection(server)
            shell.extract_remote_info()
            crash_dir = lib_cb + "crash/"
            if shell.info.type.lower() == "windows":
                crash_dir = crash_dir_win
            if int(server.port) in range(ClusterRun.port,
                                         ClusterRun.port + 10):
                crash_dir = os.path.join(
                    TestInputSingleton.input.servers[0].cli_path, "ns_server",
                    "data", "n_%s" % str(idx), "crash")
            dmp_files = shell.execute_command("ls -lt " + crash_dir)[0]
            dmp_files = [f for f in dmp_files if ".core" not in f]
            dmp_files = [f for f in dmp_files if "total" not in f]
            dmp_files = [f.split()[-1] for f in dmp_files if ".core" not in f]
            dmp_files = [f.strip("\n") for f in dmp_files]
            if dmp_files:
                print("#" * 30)
                print("%s: %d core dump seen" % (server.ip, len(dmp_files)))
                print("%s: Stack Trace of first crash - %s\n%s" %
                      (server.ip, dmp_files[-1],
                       get_gdb(shell, crash_dir, dmp_files[-1])))
                print("#" * 30)
                result = get_full_thread_dump(shell)
                print(result)
                #                 print("#"*30)
                #                 run_cbanalyze_core(shell, crash_dir + dmp_files[-1].strip(".dmp") + ".core")
                #                 print("#"*30)
                if self.stop_server_on_crash:
                    shell.stop_couchbase()
                result = True
            else:
                self.log.debug(server.ip + ": No crash files found")

            logs_dir = lib_cb + "logs/"
            if int(server.port) in range(ClusterRun.port,
                                         ClusterRun.port + 10):
                logs_dir = os.path.join(
                    TestInputSingleton.input.servers[0].cli_path, "ns_server",
                    "logs", "n_%s" % str(idx))

            # Perform log file searching based on the input yaml config
            yaml = YAML()
            with open("lib/couchbase_helper/error_log_config.yaml", "r") as fp:
                y_data = yaml.load(fp.read())

            for file_data in y_data["file_name_patterns"]:
                log_files = shell.execute_command(
                    "ls " + os.path.join(logs_dir, file_data['file']))[0]

                if len(log_files) == 0:
                    self.log.debug("%s: No '%s' files found" %
                                   (server.ip, file_data['file']))
                    continue

                if 'target_file_index' in file_data:
                    log_files = [
                        log_files[int(file_data['target_file_index'])]
                    ]

                for log_file in log_files:
                    log_file = log_file.strip("\n")
                    for grep_pattern in file_data['grep_for']:
                        grep_for_str = grep_pattern['string']
                        err_pattern = exclude_pattern = None
                        if 'error_patterns' in grep_pattern:
                            err_pattern = grep_pattern['error_patterns']
                        if 'exclude_patterns' in grep_pattern:
                            exclude_pattern = grep_pattern['exclude_patterns']

                        cmd_to_run = "grep -r '%s' %s" \
                                     % (grep_for_str, log_file)
                        if exclude_pattern is not None:
                            for pattern in exclude_pattern:
                                cmd_to_run += " | grep -v '%s'" % pattern

                        grep_output = shell.execute_command(cmd_to_run)[0]
                        if grep_output and check_logs(grep_output):
                            regex = r"(\bkvstore-\d+)"
                            grep_str = "".join(grep_output)
                            kvstores = list(set(re.findall(regex, grep_str)))
                            self.data_sets[server] = kvstores
                            grep_str = None
                        if err_pattern is not None:
                            for pattern in err_pattern:
                                index = find_index_of(grep_output, pattern)
                                grep_output = grep_output[:index]
                                if grep_output:
                                    self.log.info("unwanted messages in %s" %
                                                  log_file)
                                    if check_logs(grep_output):
                                        self.log.critical(
                                            "%s: Found '%s' logs - %s" %
                                            (server.ip, grep_for_str,
                                             "".join(grep_output)))
                                        result = True
                                        break
                        else:
                            if grep_output \
                                    and check_logs(grep_output):
                                self.log.info("unwanted messages in %s" %
                                              log_file)
                                self.log.critical(
                                    "%s: Found '%s' logs - %s" %
                                    (server.ip, grep_for_str, grep_output))
                                result = True
                                break
                    if result is True:
                        if self.stop_server_on_crash:
                            shell.stop_couchbase()
                        break

            shell.disconnect()
        if result and force_collect and not self.stop_server_on_crash:
            self.fetch_cb_collect_logs()
            self.get_cbcollect_info = False
        if (self.is_test_failed() or result) and self.collect_data:
            self.copy_data_on_slave()

        return result

    def copy_data_on_slave(self, servers=None):
        log_path = TestInputSingleton.input.param("logs_folder", "/tmp")
        if servers is None:
            servers = self.cluster.nodes_in_cluster
            for node in servers:
                if "kv" not in node.services.lower():
                    servers.remove(node)
        if type(servers) is not list:
            servers = [servers]
        remote_path = RestConnection(servers[0]).get_data_path()
        file_path = os.path.join(remote_path, self.cluster.buckets[0].name)
        file_name = self.cluster.buckets[0].name + ".tar.gz"

        def get_tar(remotepath, filepath, filename, servers, todir="."):
            if type(servers) is not list:
                servers = [servers]
            for server in servers:
                shell = RemoteMachineShellConnection(server)
                _ = shell.execute_command("tar -zcvf %s.tar.gz %s" %
                                          (filepath, filepath))
                file_check = shell.file_exists(remotepath, filename)
                if not file_check:
                    self.log.error(
                        "Tar File {} doesn't exist".format(filename))
                tar_file_copied = shell.get_file(remotepath, filename, todir)
                if not tar_file_copied:
                    self.log.error("Failed to copy Tar file")

                _ = shell.execute_command("rm -rf %s.tar.gz" % filepath)

        copy_path_msg_format = "Copying data, Server :: %s, Path :: %s"
        '''
          Temporarily enabling data copy
          of all nodes irrespective of nodes in
          data_sets
        '''
        if False and self.data_sets and self.bucket_storage == "magma":
            self.log.critical("data_sets ==> {}".format(self.data_sets))
            wal_tar = "wal.tar.gz"
            config_json_tar = "config.json.tar.gz"
            for server, kvstores in self.data_sets.items():
                shell = RemoteMachineShellConnection(server)
                if not kvstores:
                    copy_to_path = os.path.join(log_path,
                                                server.ip.replace(".", "_"))
                    if not os.path.isdir(copy_to_path):
                        os.makedirs(copy_to_path, 0o777)
                    self.log.info(copy_path_msg_format %
                                  (server.ip, copy_to_path))
                    get_tar(remote_path,
                            file_path,
                            file_name,
                            server,
                            todir=copy_to_path)
                else:
                    for kvstore in kvstores:
                        if int(kvstore.split("-")[1]) >= self.vbuckets:
                            continue
                        kvstore_path = shell.execute_command(
                            "find %s -type d -name '%s'" %
                            (remote_path, kvstore))[0][0]
                        magma_dir = kvstore_path.split(kvstore)[0]
                        wal_path = kvstore_path.split(kvstore)[0] + "wal"
                        config_json_path = kvstore_path.split(kvstore)[0]
                        + "config.json"
                        kvstore_path = kvstore_path.split(kvstore)[0] + kvstore
                        kvstore_tar = kvstore + ".tar.gz"
                        copy_to_path = os.path.join(log_path, kvstore)
                        if not os.path.isdir(copy_to_path):
                            os.makedirs(copy_to_path, 0o777)
                        self.log.info(copy_path_msg_format %
                                      (server.ip, copy_to_path))
                        get_tar(magma_dir,
                                kvstore_path,
                                kvstore_tar,
                                server,
                                todir=copy_to_path)
                        get_tar(magma_dir,
                                wal_path,
                                wal_tar,
                                server,
                                todir=copy_to_path)
                        get_tar(magma_dir,
                                config_json_path,
                                config_json_tar,
                                server,
                                todir=copy_to_path)
        else:
            for server in servers:
                copy_to_path = os.path.join(log_path,
                                            server.ip.replace(".", "_"))
                if not os.path.isdir(copy_to_path):
                    os.makedirs(copy_to_path, 0o777)
                self.log.info(copy_path_msg_format % (server.ip, copy_to_path))
                get_tar(remote_path,
                        file_path,
                        file_name,
                        server,
                        todir=copy_to_path)