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From "Ashu Pachauri (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-15093) Replication can report incorrect size of log queue for the global source when multiwal is enabled
Date Tue, 12 Jan 2016 23:41:39 GMT
Ashu Pachauri created HBASE-15093:
-------------------------------------

             Summary: Replication can report incorrect size of log queue for the global source
when multiwal is enabled
                 Key: HBASE-15093
                 URL: https://issues.apache.org/jira/browse/HBASE-15093
             Project: HBase
          Issue Type: Bug
          Components: Replication
    Affects Versions: 2.0.0, 1.2.0, 1.2.1
            Reporter: Ashu Pachauri
            Assignee: Ashu Pachauri
            Priority: Minor


Replication can  report incorrect size for the size of log queue for the global source when
multiwal is enabled. This happens because the method MetricsSource#setSizeofLogQueue performs
non-trivial operations in a multithreaded world, even though it is not synchronized. 

We can simply divide MetricsSource#setSizeofLogQueue into MetricsSource#incrSizeofLogQueue
and MetricsSource#decrSizeofLogQueue. Not sure why we are currently directly setting the size
instead of incrementing/decrementing it.



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