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Posted to dev@hive.apache.org by "Zilvinas Saltys (JIRA)" <ji...@apache.org> on 2014/05/16 12:25:23 UTC

[jira] [Created] (HIVE-7069) Zookeeper connection leak

Zilvinas Saltys created HIVE-7069:
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             Summary: Zookeeper connection leak
                 Key: HIVE-7069
                 URL: https://issues.apache.org/jira/browse/HIVE-7069
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2
    Affects Versions: 0.12.0
         Environment: Linux 2.6.32-431.11.2.el6.x86_64 #1 SMP Tue Mar 25 19:59:55 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
            Reporter: Zilvinas Saltys


We're using CDH 5.0.0 which ships with HIVE 0.12.0. We're running HiveServer2 and connect to it via JDBC. We have zookeeper support enabled. If a connection is made to HS2 and not explicitly closed via JDBC then a connection made to zookeeper is never released. It reaches a point where HS2 hangs and stops executing any new queries. It's easy to replicate with a simple script that connects to HS2 via JDBC and runs a simple query like 'show tables'. At the same time run this on the hive server machine to monitor zookeeper connections: 'while sleep 1; do netstat -anlp | grep 2181 | wc -l; done' .. If you close the connection explicitly the count will go down soon after the program exits.



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