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From "Ionut Ignatescu (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5362) ZK connection leak
Date Thu, 09 Feb 2012 16:19:59 GMT
ZK connection leak
------------------

                 Key: HBASE-5362
                 URL: https://issues.apache.org/jira/browse/HBASE-5362
             Project: HBase
          Issue Type: Bug
          Components: mapreduce
    Affects Versions: 0.90.3
            Reporter: Ionut Ignatescu


I have an application like a scheduler that starts periodically some MR jobs that reads from
one HBase table and write in more tables, changing the row key and the columns list. 
I have encounted a problem with this: after each MR job, I have +1 connections open to ZK
and after a period of time, I have received IOException. I saw that I am not the first that
had had this problem, but I didn't see any fix. No in HBase 0.90.4, nor in HBase 0.92.
To fix this issue I wrote a custom TableInputFormat that forces to close the connection to
ZK after each getSplits call. 
Also, the initTableMapperJob was overwritten.
I found an open JIRA issue here: https://issues.apache.org/jira/browse/HBASE-3792

Regards,
Ionut I. 

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