m-trieu commented on code in PR #29082:
URL: https://github.com/apache/beam/pull/29082#discussion_r1487322939
##########
runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/streaming/ActiveWorkState.java:
##########
@@ -129,13 +135,29 @@ synchronized ActivateWorkResult
activateWorkForKey(ShardedKey shardedKey, Work w
return ActivateWorkResult.EXECUTE;
}
- // Ensure we don't already have this work token queued.
+ // Check to see if we have this work token queued.
+ // This set is for adding remove-able WorkItems if they exist in the
workQueue. We add them to
+ // this set since a ConcurrentModificationException will be thrown if we
modify the workQueue
+ // and then resume iteration.
+ Set<WorkId> queuedWorkToRemove = new HashSet<>();
Review Comment:
done
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