Addition of Flux connection to try/catch (#375)

maestrowf/datastructures/core/executiongraph.py

@@ -4,8 +4,10 @@
 import getpass
 import logging
 import os
+import random
 import shutil
 import tempfile
+from time import sleep
 from filelock import FileLock, Timeout
 
 from maestrowf.abstracts import PickleInterface
@@ -599,6 +601,7 @@ def _execute_record(self, record, adapter, restart=False):
             # Increment the number of restarts we've attempted.
             LOGGER.debug("Completed submission attempt %d", num_restarts)
             num_restarts += 1
+            sleep((random.random() + 1) * num_restarts)
 
         if retcode == SubmissionCode.OK:
             self.in_progress.add(record.name)

maestrowf/interfaces/script/_flux/flux0_26_0.py

@@ -25,46 +25,46 @@ def submit(
         cls, nodes, procs, cores_per_task, path, cwd, walltime,
         ngpus=0, job_name=None, force_broker=True
     ):
-        cls.connect_to_flux()
-
-        # NOTE: This previously placed everything under a broker. However,
-        # if there's a job that schedules items to Flux, it will schedule all
-        # new jobs to the sub-broker. Sometimes this is desired, but it's
-        # incorrect to make that the general case. If we are asking for a
-        # single node, don't use a broker -- but introduce a flag that can
-        # force a single node to run in a broker.
-
-        if force_broker or nodes > 1:
-            LOGGER.debug(
-                "Launch under Flux sub-broker. [force_broker=%s, nodes=%d]",
-                force_broker, nodes
-            )
-            ngpus_per_slot = int(ceil(ngpus / nodes))
-            jobspec = flux.job.JobspecV1.from_nest_command(
-                [path], num_nodes=nodes, cores_per_slot=cores_per_task,
-                num_slots=procs, gpus_per_slot=ngpus_per_slot)
-        else:
-            LOGGER.debug(
-                "Launch under root Flux broker. [force_broker=%s, nodes=%d]",
-                force_broker, nodes
-            )
-            jobspec = flux.job.JobspecV1.from_command(
-                [path], num_tasks=procs, num_nodes=nodes,
-                cores_per_task=cores_per_task, gpus_per_task=ngpus)
-
-        LOGGER.debug("Handle address -- %s", hex(id(cls.flux_handle)))
-        if job_name:
-            jobspec.setattr("system.job.name", job_name)
-        jobspec.cwd = cwd
-        jobspec.environment = dict(os.environ)
-
-        if walltime > 0:
-            jobspec.duration = walltime
-
-        jobspec.stdout = f"{job_name}.{{{{id}}}}.out"
-        jobspec.stderr = f"{job_name}.{{{{id}}}}.err"
-
         try:
+            cls.connect_to_flux()
+
+            # NOTE: This previously placed everything under a broker. However,
+            # if there's a job that schedules items to Flux, it will schedule
+            # all new jobs to the sub-broker. Sometimes this is desired, but
+            # it's incorrect to make that the general case. If we are asking
+            # for a single node, don't use a broker -- but introduce a flag
+            # that can force a single node to run in a broker.
+
+            if force_broker or nodes > 1:
+                LOGGER.debug(
+                    "Launch under Flux sub-broker. [force_broker=%s, "
+                    "nodes=%d]", force_broker, nodes
+                )
+                ngpus_per_slot = int(ceil(ngpus / nodes))
+                jobspec = flux.job.JobspecV1.from_nest_command(
+                    [path], num_nodes=nodes, cores_per_slot=cores_per_task,
+                    num_slots=procs, gpus_per_slot=ngpus_per_slot)
+            else:
+                LOGGER.debug(
+                    "Launch under root Flux broker. [force_broker=%s, "
+                    "nodes=%d]", force_broker, nodes
+                )
+                jobspec = flux.job.JobspecV1.from_command(
+                    [path], num_tasks=procs, num_nodes=nodes,
+                    cores_per_task=cores_per_task, gpus_per_task=ngpus)
+
+            LOGGER.debug("Handle address -- %s", hex(id(cls.flux_handle)))
+            if job_name:
+                jobspec.setattr("system.job.name", job_name)
+            jobspec.cwd = cwd
+            jobspec.environment = dict(os.environ)
+
+            if walltime > 0:
+                jobspec.duration = walltime
+
+            jobspec.stdout = f"{job_name}.{{{{id}}}}.out"
+            jobspec.stderr = f"{job_name}.{{{{id}}}}.err"
+
             # Submit our job spec.
             jobid = \
                 flux.job.submit(cls.flux_handle, jobspec, waitable=True)
@@ -73,6 +73,12 @@ def submit(
 
             LOGGER.info("Submission returned status OK. -- "
                         "Assigned identifier (%s)", jobid)
+        except ConnectionResetError as exception:
+            LOGGER.error(
+                "Submission failed -- Message (%s).", exception)
+            jobid = -1
+            retcode = -2
+            submit_status = SubmissionCode.ERROR
         except Exception as exception:
             LOGGER.error(
                 "Submission failed -- Message (%s).", exception)