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Posted to dev@kafka.apache.org by "Damian Guy (JIRA)" <ji...@apache.org> on 2017/12/12 10:53:00 UTC

[jira] [Created] (KAFKA-6349) ConcurrentModificationException during streams state restoration

Damian Guy created KAFKA-6349:
---------------------------------

             Summary: ConcurrentModificationException during streams state restoration
                 Key: KAFKA-6349
                 URL: https://issues.apache.org/jira/browse/KAFKA-6349
             Project: Kafka
          Issue Type: Bug
          Components: streams
    Affects Versions: 1.1.0
            Reporter: Damian Guy
            Priority: Blocker
             Fix For: 1.1.0
         Attachments: streams-error.log

During application startup and state restoration a {{ConcurrentModificationException}} was thrown from {{AbstractStateManager}}
{code}
[2017-12-12 10:47:09,840] ERROR [streams-saak-test-client-StreamThread-2] stream-thread [streams-saak-test-client-StreamThread-2] Encountered the following error during processing: (org.apache.kafka.streams.processor.internals.StreamThread)
java.util.ConcurrentModificationException
        at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719)
        at java.util.LinkedHashMap$LinkedEntryIterator.next(LinkedHashMap.java:752)
        at java.util.LinkedHashMap$LinkedEntryIterator.next(LinkedHashMap.java:750)
        at org.apache.kafka.streams.processor.internals.AbstractStateManager.reinitializeStateStoresForPartitions(AbstractStateManager.java:74)
        at org.apache.kafka.streams.processor.internals.ProcessorStateManager.reinitializeStateStoresForPartitions(ProcessorStateManager.java:155)
        at org.apache.kafka.streams.processor.internals.AbstractTask.reinitializeStateStoresForPartitions(AbstractTask.java:229)
        at org.apache.kafka.streams.processor.internals.StoreChangelogReader.restore(StoreChangelogReader.java:94)
        at org.apache.kafka.streams.processor.internals.TaskManager.updateNewAndRestoringTasks(TaskManager.java:325)
        at org.apache.kafka.streams.processor.internals.StreamThread.runOnce(StreamThread.java:779)
        at org.apache.kafka.streams.processor.internals.StreamThread.runLoop(StreamThread.java:750)
        at org.apache.kafka.streams.processor.internals.StreamThread.run(StreamThread.java:720)
{code}



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