[jira] [Created] (HBASE-15093) Replication can report incorrect size of log queue for the global source when multiwal is enabled

["Ashu Pachauri (JIRA)" <ji...@apache.org>]

Ashu Pachauri created HBASE-15093:
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             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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