[jira] Commented: (HBASE-3095) Client needs to reconnect if it expires its zk session

["HBase Review Board (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-3095?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928305#action_12928305 ] 

HBase Review Board commented on HBASE-3095:
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Message from: "Jean-Daniel Cryans" <jd...@apache.org>

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http://review.cloudera.org/r/1167/
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Review request for hbase.


Summary
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Changes ZKW to send the SessionExpiredException in the abort call so that clients can intercept it and reconnect to ZooKeeper by first clearing up their state and establishing a new connection.


This addresses bug HBASE-3095.
    http://issues.apache.org/jira/browse/HBASE-3095


Diffs
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  /trunk/src/main/java/org/apache/hadoop/hbase/client/HConnectionManager.java 1030759 
  /trunk/src/main/java/org/apache/hadoop/hbase/zookeeper/ZooKeeperWatcher.java 1030759 
  /trunk/src/test/java/org/apache/hadoop/hbase/TestZooKeeper.java 1030759 

Diff: http://review.cloudera.org/r/1167/diff


Testing
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Adapted the client session expiration unit test.


Thanks,

Jean-Daniel




> Client needs to reconnect if it expires its zk session
> ------------------------------------------------------
>
>                 Key: HBASE-3095
>                 URL: https://issues.apache.org/jira/browse/HBASE-3095
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.90.0
>
>
> Clients use an HConnection down in their guts to connect to the hbase cluster.  Master-is-running and root-region-location are up in zk.   Setup of a new HConnection sets up a connection to ZooKeeper.  If the session with ZK expires for whatever reason -- in tests they would expire because zk ensemble was restarted across tests or we might expire because of a long GC, well, it'll be frustrating to users if we do not just try and resetup the zk connection.

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