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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-13618) ReplicationSource is too eager to remove sinks
Date Tue, 05 May 2015 04:04:06 GMT
Lars Hofhansl created HBASE-13618:
-------------------------------------

             Summary: ReplicationSource is too eager to remove sinks
                 Key: HBASE-13618
                 URL: https://issues.apache.org/jira/browse/HBASE-13618
             Project: HBase
          Issue Type: Bug
            Reporter: Lars Hofhansl
            Priority: Minor


Looking at the replication for some other reason I noticed that the replication source might
be a bit too eager to remove sinks from the list of valid sinks.

The current logic allows a sink to fail N times (default 3) and then it will be remove from
the sinks. But note that this failure count is never reduced, so given enough runtime and
some network glitches _every_ sink will eventually be removed. When all sink are removed the
source pick new sinks and the counter is set to 0 for all of them.

I think we should change to reset the counter each time we successfully replicate something
to the sink (which proves the sink isn't dead). Or we could decrease the counter each time
we successfully replication, that might be better - if we consistently fail more attempts
than we succeed the sink should be removed.



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