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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