Queue warning c8

CHANGES.md

@@ -20,6 +20,8 @@ the cylc/cylc-ui repository (and see also cylc/cylc-uiserver).
 The User Guide an other documention has been removed from the Python package to
 the cylc/cylc-doc repository.
 
+### Fixes
+
 Cylc 8.0aX (alpha) releases are not compatible with Cylc 7 or with previous
 8.0aX releases, as the API is still under heavy development.
 
@@ -33,6 +35,9 @@ The xtrigger examples were moved to a separate `cylc/cylc-xtriggers` project
 Jinja filters were moved from its `Jinja2Filters` folder to within the `cylc`
 namespace, under `cylc.jinja.filters`.
 
+[#3541](https://github.com/cylc/cylc-flow/pull/3541) - Don't warn that a task
+was already added to an internal queue, if the queue is the same.
+
 -------------------------------------------------------------------------------
 ## __cylc-8.0a2 (2019-Q4?)__
 

cylc/flow/config.py

@@ -1092,9 +1092,11 @@ def configure_queues(self):
         # Then reassign to other queues as requested.
         warnings = []
         requeued = []
+        # Record non-default queues by task name, to avoid spurious warnings
+        # about tasks "already added to a queue", when the queue is the same.
+        myq = {}
         for key, queue in list(queues.copy().items()):
-            # queues.copy() is essential here to allow items to be removed from
-            # the queues dict.
+            myq[key] = []
             if key == self.Q_DEFAULT:
                 continue
             # Assign tasks to queue and remove them from default.
@@ -1109,7 +1111,7 @@ def configure_queues(self):
                             try:
                                 queues[self.Q_DEFAULT]['members'].remove(fmem)
                             except ValueError:
-                                if fmem in requeued:
+                                if fmem in requeued and fmem not in myq[key]:
                                     msg = "%s: ignoring %s from %s (%s)" % (
                                         key, fmem, qmember,
                                         'already assigned to a queue')
@@ -1118,6 +1120,7 @@ def configure_queues(self):
                                     # Ignore: task not used in the graph.
                                     pass
                             else:
+                                myq[key] = fmem
                                 qmembers.append(fmem)
                                 requeued.append(fmem)
                 else:
@@ -1127,31 +1130,32 @@ def configure_queues(self):
                             queues[self.Q_DEFAULT]['members'].remove(qmember)
                         except ValueError:
                             if qmember in requeued:
-                                msg = "%s: ignoring '%s' (%s)" % (
-                                    key, qmember, 'task already assigned')
+                                msg = "%s: ignoring %s (%s)" % (
+                                    key, qmember,
+                                    'already assigned to a queue')
                                 warnings.append(msg)
                             elif qmember not in all_task_names:
-                                msg = "%s: ignoring '%s' (%s)" % (
+                                msg = "%s: ignoring %s (%s)" % (
                                     key, qmember, 'task not defined')
                                 warnings.append(msg)
                             else:
                                 # Ignore: task not used in the graph.
                                 pass
                         else:
+                            myq[key] = qmember
                             qmembers.append(qmember)
                             requeued.append(qmember)
-
-            if warnings:
-                err_msg = "Queue configuration warnings:"
-                for msg in warnings:
-                    err_msg += "\n+ %s" % msg
-                LOG.warning(err_msg)
-
             if qmembers:
                 queue['members'] = qmembers
             else:
                 del queues[key]
 
+        if warnings:
+            err_msg = "Queue configuration warnings:"
+            for msg in warnings:
+                err_msg += "\n+ %s" % msg
+            LOG.warning(err_msg)
+
         if cylc.flow.flags.verbose and len(queues) > 1:
             log_msg = "Internal queues created:"
             for key, queue in queues.items():

cylc/flow/tests/test_config.py

@@ -211,3 +211,28 @@ def test_family_inheritance_and_quotes(self):
                         ['MAINFAM_major1_minor10'])
                 assert 'goodbye_0_major1_minor10' in \
                        config.runtime['descendants']['SOMEFAM']
+
+
+def test_queue_config(caplog, tmp_path):
+    suiterc_content = """
+[scheduling]
+   [[queues]]
+       [[[q1]]]
+           members = A, B
+       [[[q2]]]
+           members = x
+   [[dependencies]]
+       graph = "x => y"
+[runtime]
+   [[A]]
+   [[B]]
+   [[x]]
+       inherit = A, B
+   [[y]]
+    """
+    suite_rc = tmp_path / "suite.rc"
+    suite_rc.write_text(suiterc_content)
+    config = SuiteConfig(suite="qtest", fpath=suite_rc.absolute())
+    log = caplog.messages[0].split('\n')
+    assert log[0] == "Queue configuration warnings:"
+    assert log[1] == "+ q2: ignoring x (already assigned to a queue)"