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From "Prakash Khemani (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5618) SplitLogManager - prevent unnecessary attempts to resubmits
Date Thu, 22 Mar 2012 16:40:22 GMT
SplitLogManager - prevent unnecessary attempts to resubmits

                 Key: HBASE-5618
                 URL: https://issues.apache.org/jira/browse/HBASE-5618
             Project: HBase
          Issue Type: Improvement
            Reporter: Prakash Khemani

Currently once a watch fires that the task node has been updated (hearbeated) by the worker,
the splitlogmanager still quite some time before it updates the "last heard from" time. This
is because the manager currently schedules another getDataSetWatch() and only after that finishes
will it update the task's "last heard from" time.

This leads to a large number of zk-BadVersion warnings when resubmission is continuously attempted
and it fails.

Two changes should be made
(1) On a resubmission failure because of BadVersion the task's lastUpdate time should get
(2) The task's lastUpdate time should get upped as soon as the nodeDataChanged() watch fires
and without waiting for getDataSetWatch() to complete.

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