def _bootstrap(self, hosts): log.info('Bootstrapping cluster metadata from %s', hosts) # Exponential backoff if bootstrap fails backoff_ms = self.config[ 'reconnect_backoff_ms'] * 2**self._bootstrap_fails next_at = self._last_bootstrap + backoff_ms / 1000.0 self._refresh_on_disconnects = False now = time.time() if next_at > now: log.debug("Sleeping %0.4f before bootstrapping again", next_at - now) time.sleep(next_at - now) self._last_bootstrap = time.time() if self.config['api_version'] is None or self.config['api_version'] < ( 0, 10): metadata_request = MetadataRequest[0]([]) else: metadata_request = MetadataRequest[1](None) for host, port, afi in hosts: log.debug("Attempting to bootstrap via node at %s:%s", host, port) cb = functools.partial(WeakMethod(self._conn_state_change), 'bootstrap') bootstrap = BrokerConnection(host, port, afi, state_change_callback=cb, node_id='bootstrap', **self.config) if not bootstrap.connect_blocking(): bootstrap.close() continue future = bootstrap.send(metadata_request) while not future.is_done: self._selector.select(1) for r, f in bootstrap.recv(): f.success(r) if future.failed(): bootstrap.close() continue self.cluster.update_metadata(future.value) log.info('Bootstrap succeeded: found %d brokers and %d topics.', len(self.cluster.brokers()), len(self.cluster.topics())) # A cluster with no topics can return no broker metadata # in that case, we should keep the bootstrap connection if not len(self.cluster.brokers()): self._conns['bootstrap'] = bootstrap else: bootstrap.close() self._bootstrap_fails = 0 break # No bootstrap found... else: log.error('Unable to bootstrap from %s', hosts) # Max exponential backoff is 2^12, x4000 (50ms -> 200s) self._bootstrap_fails = min(self._bootstrap_fails + 1, 12) self._refresh_on_disconnects = True
def _bootstrap(self, hosts): log.info('Bootstrapping cluster metadata from %s', hosts) # Exponential backoff if bootstrap fails backoff_ms = self.config['reconnect_backoff_ms'] * 2 ** self._bootstrap_fails next_at = self._last_bootstrap + backoff_ms / 1000.0 self._refresh_on_disconnects = False now = time.time() if next_at > now: log.debug("Sleeping %0.4f before bootstrapping again", next_at - now) time.sleep(next_at - now) self._last_bootstrap = time.time() if self.config['api_version'] is None or self.config['api_version'] < (0, 10): metadata_request = MetadataRequest[0]([]) else: metadata_request = MetadataRequest[1](None) for host, port, afi in hosts: log.debug("Attempting to bootstrap via node at %s:%s", host, port) cb = functools.partial(WeakMethod(self._conn_state_change), 'bootstrap') bootstrap = BrokerConnection(host, port, afi, state_change_callback=cb, node_id='bootstrap', **self.config) if not bootstrap.connect_blocking(): bootstrap.close() continue future = bootstrap.send(metadata_request) while not future.is_done: self._selector.select(1) for r, f in bootstrap.recv(): f.success(r) if future.failed(): bootstrap.close() continue self.cluster.update_metadata(future.value) log.info('Bootstrap succeeded: found %d brokers and %d topics.', len(self.cluster.brokers()), len(self.cluster.topics())) # A cluster with no topics can return no broker metadata # in that case, we should keep the bootstrap connection if not len(self.cluster.brokers()): self._conns['bootstrap'] = bootstrap else: bootstrap.close() self._bootstrap_fails = 0 break # No bootstrap found... else: log.error('Unable to bootstrap from %s', hosts) # Max exponential backoff is 2^12, x4000 (50ms -> 200s) self._bootstrap_fails = min(self._bootstrap_fails + 1, 12) self._refresh_on_disconnects = True