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https://issues.apache.org/jira/browse/HBASE-17287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15945696#comment-15945696
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Enis Soztutar commented on HBASE-17287:
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bq. In patch v5, before starting the mini cluster, I set config for master not
to host meta region.
Ok makes sense. I've checked the test again, seems good. The timeout of 60 secs
is aggressive I think though. Let's bump that to 3 mins. In Jenkins things can
run super slow causing flakiness.
On the other issue, do we have a problem with the default setup (master hosting
meta table and regionserver) that master abort is not causing the daemon to go
down? If we are good there, +1 for the patch.
> 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
> Fix For: 1.4.0, 2.0
>
> 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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