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Date: Fri, 3 Jan 2014 21:26:50 +0000 (UTC)
From: "Enis Soztutar (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12685687.1387490627481.40507.1388784410681@arcas>
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Subject: [jira] [Commented] (HBASE-10210) during master startup, RS can be
 you-are-dead-ed by master in error
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    [ https://issues.apache.org/jira/browse/HBASE-10210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13861920#comment-13861920 ] 

Enis Soztutar commented on HBASE-10210:
---------------------------------------

I think the last patch is good to go. Any more comments Jimmy, Liang? 

> during master startup, RS can be you-are-dead-ed by master in error
> -------------------------------------------------------------------
>
>                 Key: HBASE-10210
>                 URL: https://issues.apache.org/jira/browse/HBASE-10210
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.0, 0.96.1, 0.99.0, 0.96.1.1
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>             Fix For: 0.98.0, 0.99.0
>
>         Attachments: HBASE-10210.01.patch, HBASE-10210.02.patch, HBASE-10210.03.patch, HBASE-10210.04.patch, HBASE-10210.05.patch, HBASE-10210.patch
>
>
> Not sure of the root cause yet, I am at "how did this ever work" stage.
> We see this problem in 0.96.1, but didn't in 0.96.0 + some patches.
> It looks like RS information arriving from 2 sources - ZK and server itself, can conflict. Master doesn't handle such cases (timestamp match), and anyway technically timestamps can collide for two separate servers.
> So, master YouAreDead-s the already-recorded reporting RS, and adds it too. Then it discovers that the new server has died with fatal error!
> Note the threads.
> Addition is called from master initialization and from RPC.
> {noformat}
> 2013-12-19 11:16:45,290 INFO  [master:h2-ubuntu12-sec-1387431063-hbase-10:60000] master.ServerManager: Finished waiting for region servers count to settle; checked in 2, slept for 18262 ms, expecting minimum of 1, maximum of 2147483647, master is running.
> 2013-12-19 11:16:45,290 INFO  [master:h2-ubuntu12-sec-1387431063-hbase-10:60000] master.ServerManager: Registering server=h2-ubuntu12-sec-1387431063-hbase-8.cs1cloud.internal,60020,1387451803800
> 2013-12-19 11:16:45,290 INFO  [master:h2-ubuntu12-sec-1387431063-hbase-10:60000] master.HMaster: Registered server found up in zk but who has not yet reported in: h2-ubuntu12-sec-1387431063-hbase-8.cs1cloud.internal,60020,1387451803800
> 2013-12-19 11:16:45,380 INFO  [RpcServer.handler=4,port=60000] master.ServerManager: Triggering server recovery; existingServer h2-ubuntu12-sec-1387431063-hbase-8.cs1cloud.internal,60020,1387451803800 looks stale, new server:h2-ubuntu12-sec-1387431063-hbase-8.cs1cloud.internal,60020,1387451803800
> 2013-12-19 11:16:45,380 INFO  [RpcServer.handler=4,port=60000] master.ServerManager: Master doesn't enable ServerShutdownHandler during initialization, delay expiring server h2-ubuntu12-sec-1387431063-hbase-8.cs1cloud.internal,60020,1387451803800
> ...
> 2013-12-19 11:16:46,925 ERROR [RpcServer.handler=7,port=60000] master.HMaster: Region server h2-ubuntu12-sec-1387431063-hbase-8.cs1cloud.internal,60020,1387451803800 reported a fatal error:
> ABORTING region server h2-ubuntu12-sec-1387431063-hbase-8.cs1cloud.internal,60020,1387451803800: org.apache.hadoop.hbase.YouAreDeadException: Server REPORT rejected; currently processing h2-ubuntu12-sec-1387431063-hbase-8.cs1cloud.internal,60020,1387451803800 as dead server
> {noformat}
> Presumably some of the recent ZK listener related changes b


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