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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-14370) Use separate thread for calling ZKPermissionWatcher#refreshNodes()
Date Fri, 11 Sep 2015 14:59:46 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu updated HBASE-14370:
---------------------------
     Hadoop Flags: Reviewed
    Fix Version/s: 1.1.3
                   1.0.3
                   0.98.15
                   1.3.0
                   1.2.0
                   2.0.0

[~apurtell]:
I am preparing backport to 0.98 branch.

Let me know if you have comments.

Thanks

> Use separate thread for calling ZKPermissionWatcher#refreshNodes()
> ------------------------------------------------------------------
>
>                 Key: HBASE-14370
>                 URL: https://issues.apache.org/jira/browse/HBASE-14370
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.0
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.2.0, 1.3.0, 0.98.15, 1.0.3, 1.1.3
>
>         Attachments: 14370-branch-1-v10.txt, 14370-branch-1-v10.txt, 14370-v1.txt, 14370-v10.txt,
14370-v3.txt, 14370-v5.txt, 14370-v7.txt, 14370-v8.txt, 14370-wait-nofity-v2.txt, 14370-wait-nofity.txt,
hbase-14370_v4.patch, test-acl3-branch-1.stack
>
>
> I came off a support case (0.98.0) where main zk thread was seen doing the following:
> {code}
>   at org.apache.hadoop.hbase.security.access.ZKPermissionWatcher.refreshAuthManager(ZKPermissionWatcher.java:152)
>   at org.apache.hadoop.hbase.security.access.ZKPermissionWatcher.refreshNodes(ZKPermissionWatcher.java:135)
>   at org.apache.hadoop.hbase.security.access.ZKPermissionWatcher.nodeChildrenChanged(ZKPermissionWatcher.java:121)
>   at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:348)
>   at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519)
>   at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
> {code}
> There were 62000 nodes under /acl due to lack of fix from HBASE-12635, leading to slowness
in table creation because zk notification for region offline was blocked by the above.
> The attached patch separates refreshNodes() call into its own thread.
> Thanks to Enis and Devaraj for offline discussion.



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