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From "Sean Busbey (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-2266) TServer should ensure wal settings are valid for underlying FS
Date Tue, 28 Jan 2014 16:17:40 GMT
Sean Busbey created ACCUMULO-2266:
-------------------------------------

             Summary: TServer should ensure wal settings are valid for underlying FS
                 Key: ACCUMULO-2266
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2266
             Project: Accumulo
          Issue Type: Bug
          Components: tserver
    Affects Versions: 1.5.0
            Reporter: Sean Busbey
            Priority: Critical
             Fix For: 1.5.1, 1.6.0


ACCUMULO-2264 revealed a problem in how the tserver handles conflicts between it's settings
and the restrictions of the underlying fs.

In the case of ACCUMULO-2264, if the tserver is configured with a wal block size less than
that allowed by HDFS the tserver sits in an infinite loop.

The tserver should probably be checking for the minimum blocksize (the property is dfs.namenode.fs-limits.min-block-size)
and then either issuing a WARN/ERROR to the client and using the minimum or failing loudly
and refusing to start. I favor the latter.



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