Beispiel #1
0
 def _get_job_scripts(itask, rtconfig):
     """Return pre-script, script, post-script for a job."""
     script = rtconfig['script']
     pre_script = rtconfig['pre-script']
     post_script = rtconfig['post-script']
     if itask.tdef.suite_polling_cfg:
         # Automatic suite state polling script
         comstr = "cylc suite-state " + \
                  " --task=" + itask.tdef.suite_polling_cfg['task'] + \
                  " --point=" + str(itask.point)
         if LOG.isEnabledFor(DEBUG):
             comstr += ' --debug'
         for key, fmt in [('user', ' --%s=%s'), ('host', ' --%s=%s'),
                          ('interval', ' --%s=%d'),
                          ('max-polls', ' --%s=%s'),
                          ('run-dir', ' --%s=%s')]:
             if rtconfig['suite state polling'][key]:
                 comstr += fmt % (key, rtconfig['suite state polling'][key])
         if rtconfig['suite state polling']['message']:
             comstr += " --message='%s'" % (
                 rtconfig['suite state polling']['message'])
         else:
             comstr += " --status=" + itask.tdef.suite_polling_cfg['status']
         comstr += " " + itask.tdef.suite_polling_cfg['suite']
         script = "echo " + comstr + "\n" + comstr
     return pre_script, script, post_script
Beispiel #2
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    def _run_job_cmd(self, cmd_key, suite, itasks, callback):
        """Run job commands, e.g. poll, kill, etc.

        Group itasks with their user@host.
        Put a job command for each user@host to the multiprocess pool.

        """
        if not itasks:
            return
        auth_itasks = {}
        for itask in itasks:
            if (itask.task_host, itask.task_owner) not in auth_itasks:
                auth_itasks[(itask.task_host, itask.task_owner)] = []
            auth_itasks[(itask.task_host, itask.task_owner)].append(itask)
        for (host, owner), itasks in sorted(auth_itasks.items()):
            cmd = ["cylc", cmd_key]
            if LOG.isEnabledFor(DEBUG):
                cmd.append("--debug")
            if is_remote_host(host):
                cmd.append("--host=%s" % (host))
            if is_remote_user(owner):
                cmd.append("--user=%s" % (owner))
            cmd.append("--")
            cmd.append(get_remote_suite_run_job_dir(host, owner, suite))
            job_log_dirs = []
            for itask in sorted(itasks, key=lambda itask: itask.identity):
                job_log_dirs.append(
                    get_task_job_id(itask.point, itask.tdef.name,
                                    itask.submit_num))
            cmd += job_log_dirs
            self.proc_pool.put_command(SubProcContext(cmd_key, cmd), callback,
                                       [suite, itasks])
Beispiel #3
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    def _run_job_cmd(self, cmd_key, suite, itasks, callback):
        """Run job commands, e.g. poll, kill, etc.

        Group itasks with their user@host.
        Put a job command for each user@host to the multiprocess pool.

        """
        if not itasks:
            return
        auth_itasks = {}
        for itask in itasks:
            if (itask.task_host, itask.task_owner) not in auth_itasks:
                auth_itasks[(itask.task_host, itask.task_owner)] = []
            auth_itasks[(itask.task_host, itask.task_owner)].append(itask)
        for (host, owner), itasks in sorted(auth_itasks.items()):
            cmd = ["cylc", cmd_key]
            if LOG.isEnabledFor(DEBUG):
                cmd.append("--debug")
            if is_remote_host(host):
                cmd.append("--host=%s" % (host))
            if is_remote_user(owner):
                cmd.append("--user=%s" % (owner))
            cmd.append("--")
            cmd.append(glbl_cfg().get_derived_host_item(
                suite, "suite job log directory", host, owner))
            job_log_dirs = []
            for itask in sorted(itasks, key=lambda itask: itask.identity):
                job_log_dirs.append(get_task_job_id(
                    itask.point, itask.tdef.name, itask.submit_num))
            cmd += job_log_dirs
            self.proc_pool.put_command(
                SubProcContext(cmd_key, cmd), callback, [suite, itasks])
Beispiel #4
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 def _get_job_scripts(itask, rtconfig):
     """Return pre-script, script, post-script for a job."""
     script = rtconfig['script']
     pre_script = rtconfig['pre-script']
     post_script = rtconfig['post-script']
     if itask.tdef.suite_polling_cfg:
         # Automatic suite state polling script
         comstr = "cylc suite-state " + \
                  " --task=" + itask.tdef.suite_polling_cfg['task'] + \
                  " --point=" + str(itask.point)
         if LOG.isEnabledFor(DEBUG):
             comstr += ' --debug'
         for key, fmt in [
                 ('user', ' --%s=%s'),
                 ('host', ' --%s=%s'),
                 ('interval', ' --%s=%d'),
                 ('max-polls', ' --%s=%s'),
                 ('run-dir', ' --%s=%s')]:
             if rtconfig['suite state polling'][key]:
                 comstr += fmt % (key, rtconfig['suite state polling'][key])
         if rtconfig['suite state polling']['message']:
             comstr += " --message='%s'" % (
                 rtconfig['suite state polling']['message'])
         else:
             comstr += " --status=" + itask.tdef.suite_polling_cfg['status']
         comstr += " " + itask.tdef.suite_polling_cfg['suite']
         script = "echo " + comstr + "\n" + comstr
     return pre_script, script, post_script
Beispiel #5
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    def _process_job_logs_retrieval(self, schd_ctx, ctx, id_keys):
        """Process retrieval of task job logs from remote user@host."""
        if ctx.user_at_host and "@" in ctx.user_at_host:
            s_user, s_host = ctx.user_at_host.split("@", 1)
        else:
            s_user, s_host = (None, ctx.user_at_host)
        ssh_str = str(glbl_cfg().get_host_item("ssh command", s_host, s_user))
        rsync_str = str(glbl_cfg().get_host_item("retrieve job logs command",
                                                 s_host, s_user))

        cmd = shlex.split(rsync_str) + ["--rsh=" + ssh_str]
        if LOG.isEnabledFor(DEBUG):
            cmd.append("-v")
        if ctx.max_size:
            cmd.append("--max-size=%s" % (ctx.max_size, ))
        # Includes and excludes
        includes = set()
        for _, point, name, submit_num in id_keys:
            # Include relevant directories, all levels needed
            includes.add("/%s" % (point))
            includes.add("/%s/%s" % (point, name))
            includes.add("/%s/%s/%02d" % (point, name, submit_num))
            includes.add("/%s/%s/%02d/**" % (point, name, submit_num))
        cmd += ["--include=%s" % (include) for include in sorted(includes)]
        cmd.append("--exclude=/**")  # exclude everything else
        # Remote source
        cmd.append(
            "%s:%s/" %
            (ctx.user_at_host,
             get_remote_suite_run_job_dir(s_host, s_user, schd_ctx.suite)))
        # Local target
        cmd.append(get_suite_run_job_dir(schd_ctx.suite) + "/")
        self.proc_pool.put_command(
            SubProcContext(ctx, cmd, env=dict(os.environ), id_keys=id_keys),
            self._job_logs_retrieval_callback, [schd_ctx])
Beispiel #6
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    def _run_job_cmd(self, cmd_key, suite, itasks, callback):
        """Run job commands, e.g. poll, kill, etc.

        Group itasks with their platform_name and host.
        Put a job command for each group to the multiprocess pool.

        """
        if not itasks:
            return
        # sort itasks into lists based upon where they were run.
        auth_itasks = {}
        for itask in itasks:
            platform_n = itask.platform['name']
            if platform_n not in auth_itasks:
                auth_itasks[platform_n] = []
            auth_itasks[platform_n].append(itask)

        # Go through each list of itasks and carry out commands as required.
        for platform_n, itasks in sorted(auth_itasks.items()):
            platform = get_platform(platform_n)
            if is_remote_platform(platform):
                remote_mode = True
                cmd = [cmd_key]
            else:
                cmd = ["cylc", cmd_key]
                remote_mode = False
            if LOG.isEnabledFor(DEBUG):
                cmd.append("--debug")
            cmd.append("--")
            cmd.append(get_remote_suite_run_job_dir(platform, suite))
            job_log_dirs = []
            if remote_mode:
                cmd = construct_ssh_cmd(cmd, platform)
            for itask in sorted(itasks, key=lambda itask: itask.identity):
                job_log_dirs.append(
                    get_task_job_id(itask.point, itask.tdef.name,
                                    itask.submit_num))
            cmd += job_log_dirs
            self.proc_pool.put_command(SubProcContext(cmd_key, cmd), callback,
                                       [suite, itasks])
Beispiel #7
0
    def submit_task_jobs(self, suite, itasks, is_simulation=False):
        """Prepare and submit task jobs.

        Submit tasks where possible. Ignore tasks that are waiting for host
        select command to complete, or tasks that are waiting for remote
        initialisation. Bad host select command, error writing to a job file or
        bad remote initialisation will cause a bad task - leading to submission
        failure.

        This method uses prep_submit_task_job() as helper.

        Return (list): list of tasks that attempted submission.
        """
        if is_simulation:
            return self._simulation_submit_task_jobs(itasks)

        # Prepare tasks for job submission
        prepared_tasks, bad_tasks = self.prep_submit_task_jobs(suite, itasks)

        # Reset consumed host selection results
        self.task_remote_mgr.remote_host_select_reset()

        if not prepared_tasks:
            return bad_tasks

        # Group task jobs by (host, owner)
        auth_itasks = {}  # {(host, owner): [itask, ...], ...}
        for itask in prepared_tasks:
            auth_itasks.setdefault((itask.task_host, itask.task_owner), [])
            auth_itasks[(itask.task_host, itask.task_owner)].append(itask)
        # Submit task jobs for each (host, owner) group
        done_tasks = bad_tasks
        for (host, owner), itasks in sorted(auth_itasks.items()):
            is_init = self.task_remote_mgr.remote_init(host, owner)
            if is_init is None:
                # Remote is waiting to be initialised
                for itask in itasks:
                    itask.set_summary_message(self.REMOTE_INIT_MSG)
                    self.job_pool.add_job_msg(
                        get_task_job_id(itask.point, itask.tdef.name,
                                        itask.submit_num),
                        self.REMOTE_INIT_MSG)
                continue
            # Ensure that localhost background/at jobs are recorded as running
            # on the host name of the current suite host, rather than just
            # "localhost". On suite restart on a different suite host, this
            # allows the restart logic to correctly poll the status of the
            # background/at jobs that may still be running on the previous
            # suite host.
            if (self.batch_sys_mgr.is_job_local_to_host(
                    itask.summary['batch_sys_name'])
                    and not is_remote_host(host)):
                owner_at_host = get_host()
            else:
                owner_at_host = host
            # Persist
            if owner:
                owner_at_host = owner + '@' + owner_at_host
            now_str = get_current_time_string()
            done_tasks.extend(itasks)
            for itask in itasks:
                # Log and persist
                LOG.info('[%s] -submit-num=%02d, owner@host=%s', itask,
                         itask.submit_num, owner_at_host)
                self.suite_db_mgr.put_insert_task_jobs(
                    itask, {
                        'is_manual_submit': itask.is_manual_submit,
                        'try_num': itask.get_try_num(),
                        'time_submit': now_str,
                        'user_at_host': owner_at_host,
                        'batch_sys_name': itask.summary['batch_sys_name'],
                    })
                itask.is_manual_submit = False
            if is_init == REMOTE_INIT_FAILED:
                # Remote has failed to initialise
                # Set submit-failed for all affected tasks
                for itask in itasks:
                    itask.local_job_file_path = None  # reset for retry
                    log_task_job_activity(
                        SubProcContext(self.JOBS_SUBMIT,
                                       '(init %s)' % owner_at_host,
                                       err=REMOTE_INIT_FAILED,
                                       ret_code=1), suite, itask.point,
                        itask.tdef.name)
                    self.task_events_mgr.process_message(
                        itask, CRITICAL,
                        self.task_events_mgr.EVENT_SUBMIT_FAILED)
                continue
            # Build the "cylc jobs-submit" command
            cmd = ['cylc', self.JOBS_SUBMIT]
            if LOG.isEnabledFor(DEBUG):
                cmd.append('--debug')
            if get_utc_mode():
                cmd.append('--utc-mode')
            remote_mode = False
            kwargs = {}
            for key, value, test_func in [('host', host, is_remote_host),
                                          ('user', owner, is_remote_user)]:
                if test_func(value):
                    cmd.append('--%s=%s' % (key, value))
                    remote_mode = True
                    kwargs[key] = value
            if remote_mode:
                cmd.append('--remote-mode')
            cmd.append('--')
            cmd.append(get_remote_suite_run_job_dir(host, owner, suite))
            # Chop itasks into a series of shorter lists if it's very big
            # to prevent overloading of stdout and stderr pipes.
            itasks = sorted(itasks, key=lambda itask: itask.identity)
            chunk_size = len(itasks) // ((len(itasks) // 100) + 1) + 1
            itasks_batches = [
                itasks[i:i + chunk_size]
                for i in range(0, len(itasks), chunk_size)
            ]
            LOG.debug('%s ... # will invoke in batches, sizes=%s', cmd,
                      [len(b) for b in itasks_batches])
            for i, itasks_batch in enumerate(itasks_batches):
                stdin_files = []
                job_log_dirs = []
                for itask in itasks_batch:
                    if remote_mode:
                        stdin_files.append(
                            get_task_job_job_log(suite, itask.point,
                                                 itask.tdef.name,
                                                 itask.submit_num))
                    job_log_dirs.append(
                        get_task_job_id(itask.point, itask.tdef.name,
                                        itask.submit_num))
                    # The job file is now (about to be) used: reset the file
                    # write flag so that subsequent manual retrigger will
                    # generate a new job file.
                    itask.local_job_file_path = None
                    itask.state.reset(TASK_STATUS_READY)
                    if itask.state.outputs.has_custom_triggers():
                        self.suite_db_mgr.put_update_task_outputs(itask)
                self.proc_pool.put_command(
                    SubProcContext(self.JOBS_SUBMIT,
                                   cmd + job_log_dirs,
                                   stdin_files=stdin_files,
                                   job_log_dirs=job_log_dirs,
                                   **kwargs), self._submit_task_jobs_callback,
                    [suite, itasks_batch])
        return done_tasks
Beispiel #8
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    def submit_task_jobs(self, suite, itasks, is_simulation=False):
        """Prepare and submit task jobs.

        Submit tasks where possible. Ignore tasks that are waiting for host
        select command to complete, or tasks that are waiting for remote
        initialisation. Bad host select command, error writing to a job file or
        bad remote initialisation will cause a bad task - leading to submission
        failure.

        This method uses prep_submit_task_job() as helper.

        Return (list): list of tasks that attempted submission.
        """
        if is_simulation:
            return self._simulation_submit_task_jobs(itasks)

        # Prepare tasks for job submission
        prepared_tasks, bad_tasks = self.prep_submit_task_jobs(suite, itasks)

        # Reset consumed host selection results
        self.task_remote_mgr.remote_host_select_reset()

        if not prepared_tasks:
            return bad_tasks

        # Group task jobs by (host, owner)
        auth_itasks = {}  # {(host, owner): [itask, ...], ...}
        for itask in prepared_tasks:
            auth_itasks.setdefault((itask.task_host, itask.task_owner), [])
            auth_itasks[(itask.task_host, itask.task_owner)].append(itask)
        # Submit task jobs for each (host, owner) group
        done_tasks = bad_tasks
        for (host, owner), itasks in sorted(auth_itasks.items()):
            is_init = self.task_remote_mgr.remote_init(host, owner)
            if is_init is None:
                # Remote is waiting to be initialised
                for itask in itasks:
                    itask.set_summary_message(self.REMOTE_INIT_MSG)
                continue
            # Ensure that localhost background/at jobs are recorded as running
            # on the host name of the current suite host, rather than just
            # "localhost". On suite restart on a different suite host, this
            # allows the restart logic to correctly poll the status of the
            # background/at jobs that may still be running on the previous
            # suite host.
            if (
                self.batch_sys_mgr.is_job_local_to_host(
                    itask.summary['batch_sys_name']) and
                not is_remote_host(host)
            ):
                owner_at_host = get_host()
            else:
                owner_at_host = host
            # Persist
            if owner:
                owner_at_host = owner + '@' + owner_at_host
            now_str = get_current_time_string()
            done_tasks.extend(itasks)
            for itask in itasks:
                # Log and persist
                LOG.info(
                    '[%s] -submit-num=%02d, owner@host=%s',
                    itask, itask.submit_num, owner_at_host)
                self.suite_db_mgr.put_insert_task_jobs(itask, {
                    'is_manual_submit': itask.is_manual_submit,
                    'try_num': itask.get_try_num(),
                    'time_submit': now_str,
                    'user_at_host': owner_at_host,
                    'batch_sys_name': itask.summary['batch_sys_name'],
                })
                itask.is_manual_submit = False
            if is_init == REMOTE_INIT_FAILED:
                # Remote has failed to initialise
                # Set submit-failed for all affected tasks
                for itask in itasks:
                    itask.local_job_file_path = None  # reset for retry
                    log_task_job_activity(
                        SubProcContext(
                            self.JOBS_SUBMIT,
                            '(init %s)' % owner_at_host,
                            err=REMOTE_INIT_FAILED,
                            ret_code=1),
                        suite, itask.point, itask.tdef.name)
                    self.task_events_mgr.process_message(
                        itask, CRITICAL,
                        self.task_events_mgr.EVENT_SUBMIT_FAILED)
                continue
            # Build the "cylc jobs-submit" command
            cmd = ['cylc', self.JOBS_SUBMIT]
            if LOG.isEnabledFor(DEBUG):
                cmd.append('--debug')
            if get_utc_mode():
                cmd.append('--utc-mode')
            remote_mode = False
            kwargs = {}
            for key, value, test_func in [
                    ('host', host, is_remote_host),
                    ('user', owner, is_remote_user)]:
                if test_func(value):
                    cmd.append('--%s=%s' % (key, value))
                    remote_mode = True
                    kwargs[key] = value
            if remote_mode:
                cmd.append('--remote-mode')
            cmd.append('--')
            cmd.append(glbl_cfg().get_derived_host_item(
                suite, 'suite job log directory', host, owner))
            # Chop itasks into a series of shorter lists if it's very big
            # to prevent overloading of stdout and stderr pipes.
            itasks = sorted(itasks, key=lambda itask: itask.identity)
            chunk_size = len(itasks) // ((len(itasks) // 100) + 1) + 1
            itasks_batches = [
                itasks[i:i + chunk_size] for i in range(0,
                                                        len(itasks),
                                                        chunk_size)]
            LOG.debug(
                '%s ... # will invoke in batches, sizes=%s',
                cmd, [len(b) for b in itasks_batches])
            for i, itasks_batch in enumerate(itasks_batches):
                stdin_files = []
                job_log_dirs = []
                for itask in itasks_batch:
                    if remote_mode:
                        stdin_files.append(
                            get_task_job_job_log(
                                suite, itask.point, itask.tdef.name,
                                itask.submit_num))
                    job_log_dirs.append(get_task_job_id(
                        itask.point, itask.tdef.name, itask.submit_num))
                    # The job file is now (about to be) used: reset the file
                    # write flag so that subsequent manual retrigger will
                    # generate a new job file.
                    itask.local_job_file_path = None
                    itask.state.reset_state(TASK_STATUS_READY)
                    if itask.state.outputs.has_custom_triggers():
                        self.suite_db_mgr.put_update_task_outputs(itask)
                self.proc_pool.put_command(
                    SubProcContext(
                        self.JOBS_SUBMIT,
                        cmd + job_log_dirs,
                        stdin_files=stdin_files,
                        job_log_dirs=job_log_dirs,
                        **kwargs
                    ),
                    self._submit_task_jobs_callback, [suite, itasks_batch])
        return done_tasks
Beispiel #9
0
    def submit_task_jobs(self,
                         suite,
                         itasks,
                         curve_auth,
                         client_pub_key_dir,
                         is_simulation=False):
        """Prepare for job submission and submit task jobs.

        Preparation (host selection, remote host init, and remote install)
        is done asynchronously. Newly released tasks may be sent here several
        times until these init subprocesses have returned. Failure during
        preparation is considered to be job submission failure.

        Once preparation has completed or failed, reset .waiting_on_job_prep in
        task instances so the scheduler knows to stop sending them back here.

        This method uses prep_submit_task_job() as helper.

        Return (list): list of tasks that attempted submission.
        """
        if is_simulation:
            return self._simulation_submit_task_jobs(itasks)

        # Prepare tasks for job submission
        prepared_tasks, bad_tasks = self.prep_submit_task_jobs(suite, itasks)

        # Reset consumed host selection results
        self.task_remote_mgr.subshell_eval_reset()

        if not prepared_tasks:
            return bad_tasks
        auth_itasks = {}  # {platform: [itask, ...], ...}
        for itask in prepared_tasks:
            platform_name = itask.platform['name']
            auth_itasks.setdefault(platform_name, [])
            auth_itasks[platform_name].append(itask)
        # Submit task jobs for each platform
        done_tasks = bad_tasks

        for platform_name, itasks in sorted(auth_itasks.items()):
            platform = itasks[0].platform
            install_target = get_install_target_from_platform(platform)
            ri_map = self.task_remote_mgr.remote_init_map

            if (ri_map.get(install_target) != REMOTE_FILE_INSTALL_DONE):
                if install_target == get_localhost_install_target():
                    # Skip init and file install for localhost.
                    LOG.debug(f"REMOTE INIT NOT REQUIRED for {install_target}")
                    ri_map[install_target] = (REMOTE_FILE_INSTALL_DONE)

                elif install_target not in ri_map:
                    # Remote init not in progress for target, so start it.
                    self.task_remote_mgr.remote_init(platform, curve_auth,
                                                     client_pub_key_dir)
                    for itask in itasks:
                        itask.set_summary_message(self.REMOTE_INIT_MSG)
                        self.data_store_mgr.delta_job_msg(
                            get_task_job_id(itask.point, itask.tdef.name,
                                            itask.submit_num),
                            self.REMOTE_INIT_MSG)
                    continue

                elif (ri_map[install_target] == REMOTE_INIT_DONE):
                    # Already done remote init so move on to file install
                    self.task_remote_mgr.file_install(platform)
                    continue

                elif (ri_map[install_target] in self.IN_PROGRESS.keys()):
                    # Remote init or file install in progress.
                    for itask in itasks:
                        msg = self.IN_PROGRESS[ri_map[install_target]]
                        itask.set_summary_message(msg)
                        self.data_store_mgr.delta_job_msg(
                            get_task_job_id(itask.point, itask.tdef.name,
                                            itask.submit_num), msg)
                    continue

            # Ensure that localhost background/at jobs are recorded as running
            # on the host name of the current suite host, rather than just
            # "localhost". On suite restart on a different suite host, this
            # allows the restart logic to correctly poll the status of the
            # background/at jobs that may still be running on the previous
            # suite host.
            host = get_host_from_platform(platform)
            if (self.job_runner_mgr.is_job_local_to_host(
                    itask.summary['job_runner_name'])
                    and not is_remote_platform(platform)):
                host = get_host()

            now_str = get_current_time_string()
            done_tasks.extend(itasks)
            for itask in itasks:
                # Log and persist
                LOG.info('[%s] -submit-num=%02d, host=%s', itask,
                         itask.submit_num, host)
                self.suite_db_mgr.put_insert_task_jobs(
                    itask, {
                        'is_manual_submit': itask.is_manual_submit,
                        'try_num': itask.get_try_num(),
                        'time_submit': now_str,
                        'platform_name': itask.platform['name'],
                        'job_runner_name': itask.summary['job_runner_name'],
                    })
                itask.is_manual_submit = False

            if (ri_map[install_target]
                    in [REMOTE_INIT_FAILED, REMOTE_FILE_INSTALL_FAILED]):
                # Remote init or install failed. Set submit-failed for all
                # affected tasks and remove target from remote init map
                # - this enables new tasks to re-initialise that target
                init_error = (ri_map[install_target])
                del ri_map[install_target]
                for itask in itasks:
                    itask.waiting_on_job_prep = False
                    itask.local_job_file_path = None  # reset for retry
                    log_task_job_activity(
                        SubProcContext(self.JOBS_SUBMIT,
                                       '(init %s)' % host,
                                       err=init_error,
                                       ret_code=1), suite, itask.point,
                        itask.tdef.name)
                    self._prep_submit_task_job_error(suite, itask,
                                                     '(remote init)', '')

                continue
            # Build the "cylc jobs-submit" command
            cmd = [self.JOBS_SUBMIT]
            if LOG.isEnabledFor(DEBUG):
                cmd.append('--debug')
            if get_utc_mode():
                cmd.append('--utc-mode')
            if is_remote_platform(itask.platform):
                remote_mode = True
                cmd.append('--remote-mode')
            else:
                remote_mode = False
            if itask.platform['clean job submission environment']:
                cmd.append('--clean-env')
            for var in itask.platform[
                    'job submission environment pass-through']:
                cmd.append(f"--env={var}")
            for path in itask.platform[
                    'job submission executable paths'] + SYSPATH:
                cmd.append(f"--path={path}")
            cmd.append('--')
            cmd.append(get_remote_suite_run_job_dir(platform, suite))
            # Chop itasks into a series of shorter lists if it's very big
            # to prevent overloading of stdout and stderr pipes.
            itasks = sorted(itasks, key=lambda itask: itask.identity)
            chunk_size = (len(itasks) // (
                (len(itasks) // platform['max batch submit size']) + 1) + 1)
            itasks_batches = [
                itasks[i:i + chunk_size]
                for i in range(0, len(itasks), chunk_size)
            ]
            LOG.debug('%s ... # will invoke in batches, sizes=%s', cmd,
                      [len(b) for b in itasks_batches])

            if remote_mode:
                cmd = construct_ssh_cmd(cmd, platform)
            else:
                cmd = ['cylc'] + cmd

            for i, itasks_batch in enumerate(itasks_batches):
                stdin_files = []
                job_log_dirs = []
                for itask in itasks_batch:
                    if remote_mode:
                        stdin_files.append(
                            os.path.expandvars(
                                get_task_job_job_log(suite, itask.point,
                                                     itask.tdef.name,
                                                     itask.submit_num)))
                    job_log_dirs.append(
                        get_task_job_id(itask.point, itask.tdef.name,
                                        itask.submit_num))
                    # The job file is now (about to be) used: reset the file
                    # write flag so that subsequent manual retrigger will
                    # generate a new job file.
                    itask.local_job_file_path = None
                    if itask.state.outputs.has_custom_triggers():
                        self.suite_db_mgr.put_update_task_outputs(itask)

                    itask.waiting_on_job_prep = False
                self.proc_pool.put_command(
                    SubProcContext(
                        self.JOBS_SUBMIT,
                        cmd + job_log_dirs,
                        stdin_files=stdin_files,
                        job_log_dirs=job_log_dirs,
                    ), self._submit_task_jobs_callback, [suite, itasks_batch])
        return done_tasks