Liu Shaohui created HBASE-12943:
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Summary: Set sun.net.inetaddr.ttl in HBase
Key: HBASE-12943
URL: https://issues.apache.org/jira/browse/HBASE-12943
Project: HBase
Issue Type: Bug
Reporter: Liu Shaohui
Assignee: Liu Shaohui
The default value of config: sun.net.inetaddr.ttl is -1 and the java processes
will cache the mapping of hostname to ip address forever, See:
http://docs.oracle.com/javase/7/docs/technotes/guides/net/properties.html
But things go wrong when a regionserver with same hostname and different ip
address rejoins the hbase cluster. The HMaster will get wrong ip address of the
regionserver from this cache and every region assignment to this regionserver
will be blocked for a time because the HMaster can't communicate with the
regionserver.
A tradeoff is to set the sun.net.inetaddr.ttl to 10m or 1h and make the wrong
cache expired.
Suggestions are welcomed. Thanks~
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