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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17287) Master becomes a zombie if filesystem object closes
Date Wed, 29 Mar 2017 14:42:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15947249#comment-15947249
] 

Hudson commented on HBASE-17287:
--------------------------------

SUCCESS: Integrated in Jenkins build HBase-1.2-IT #853 (See [https://builds.apache.org/job/HBase-1.2-IT/853/])
HBASE-17287 Master becomes a zombie if filesystem object closes (tedyu: rev 2d79b7d5a508c2175312487db3e93d838e063ec2)
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java
* (add) hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestSafemodeBringsDownMaster.java


> Master becomes a zombie if filesystem object closes
> ---------------------------------------------------
>
>                 Key: HBASE-17287
>                 URL: https://issues.apache.org/jira/browse/HBASE-17287
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: Clay B.
>            Assignee: Ted Yu
>            Priority: Blocker
>             Fix For: 1.4.0, 1.3.1, 1.1.9, 2.0, 1.2.6
>
>         Attachments: 17287.branch-1.1.v4.txt, 17287.branch-1.v3.txt, 17287.branch-1.v4.txt,
17287.master.v2.txt, 17287.master.v3.txt, 17287.master.v4.txt, 17287.master.v5.txt, 17287.v2.txt
>
>
> We have seen an issue whereby if the HDFS is unstable and the HBase master's HDFS client
is unable to stabilize before {{dfs.client.failover.max.attempts}} then the master's filesystem
object closes. This seems to result in an HBase master which will continue to run (process
and znode exists) but no meaningful work can be done (e.g. assigning meta).What we saw in
our HBase master logs was:{code}2016-12-01 19:19:08,192 ERROR org.apache.hadoop.hbase.master.handler.MetaServerShutdownHandler:
Caught M_META_SERVER_SHUTDOWN, count=1java.io.IOException: failed log splitting for cluster-r5n12.bloomberg.com,60200,1480632863218,
will retryat org.apache.hadoop.hbase.master.handler.MetaServerShutdownHandler.process(MetaServerShutdownHandler.java:84)at
org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:129)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)at java.lang.Thread.run(Thread.java:745)Caused
by: java.io.IOException: Filesystem closed{code}



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