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Posted to dev@eagle.apache.org by "Su Ralph (JIRA)" <ji...@apache.org> on 2016/09/27 15:33:21 UTC

[jira] [Created] (EAGLE-569) AlertPublishImpl: Concurrency : Inplace change metadata cause concurrent modification issue

Su Ralph created EAGLE-569:
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             Summary: AlertPublishImpl: Concurrency : Inplace change metadata cause concurrent modification issue
                 Key: EAGLE-569
                 URL: https://issues.apache.org/jira/browse/EAGLE-569
             Project: Eagle
          Issue Type: Bug
    Affects Versions: v0.5.0
            Reporter: Su Ralph
            Assignee: Garrett Li
            Priority: Critical
             Fix For: v0.5.0


We are try to re-use eagle alert module as part our streaming processing core, during test, we found below error.

6700    java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) at java.util.ArrayList$Itr.next(ArrayList.java:851) at org.apache.eagle.alert.engine.publisher.impl.AlertPublisherImpl.notifyAlert(AlertPublisherImpl.java:74)


It happens to be in AlertPublisherImpl, the metadata change is doing inplace update, which cause the concurrency issue when the bolt is continuing ingest data.

This exception should cause following data stream not able to be published. Hence be blocker



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