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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-4090) BatchWriter close not cleaning up all resources
Date Wed, 23 Dec 2015 14:42:46 GMT
Eric Newton created ACCUMULO-4090:
-------------------------------------

             Summary: BatchWriter close not cleaning up all resources
                 Key: ACCUMULO-4090
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4090
             Project: Accumulo
          Issue Type: Bug
          Components: client
    Affects Versions: 1.7.0
            Reporter: Eric Newton
            Assignee: Eric Newton


I'm debugging an issue with a long-running ingestor, similar to the TraceServer.

After realizing that BatchWriter close needs to be called when a MutationsRejectedException
occurs (see ACCUMULO-4088), a close was added, and the client became more stable.

However, after a day, or so, the client became sluggish. When inspecting a heap dump, many
TabletServerBatchWriter objects were still referenced.  This server should only have two BatchWriter
instances at any one time, and this server had >100.

Still debugging.

The error that initiates the issue is a SessionID not found, presumably because the session
timed out.  This is the cause of the MutationsRejectedException seen by the client.





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