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From "Vikram Srivastava (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2154) NoNodeException error in master
Date Wed, 22 Jan 2014 18:45:20 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13878990#comment-13878990
] 

Vikram Srivastava commented on ACCUMULO-2154:
---------------------------------------------

Thanks for the explanation [~kturner]. I was under the impression that only master accesses
the dead TServers znode. But if that's not the case what you said makes sense. I'll submit
another patch that ignores the NoNodeException.

> NoNodeException error in master
> -------------------------------
>
>                 Key: ACCUMULO-2154
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2154
>             Project: Accumulo
>          Issue Type: Bug
>          Components: master
>         Environment: 1.6.0 sha 417902e218c566333b6ea5ac492186ae305e5e16
>            Reporter: John Vines
>            Assignee: Vikram Srivastava
>              Labels: PatchAvailable
>             Fix For: 1.6.0
>
>         Attachments: ACCUMULO-2154.v1.patch.txt
>
>
> I have a test that brings accumulo down hard after a minute and then brings it back up
again. I was running it overnight and I saw this stack trace once. Not sure if it's a problem
or not though.
> {code}org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode
for /accumulo/617ee3a7-98b9-4f5f-af13-8894afe7c33c/dead/tservers/10.10.1.148:9997
> 	org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /accumulo/617ee3a7-98b9-4f5f-af13-8894afe7c33c/dead/tservers/10.10.1.148:9997
> 		at org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
> 		at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> 		at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1151)
> 		at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1180)
> 		at org.apache.accumulo.fate.zookeeper.ZooReader.getData(ZooReader.java:45)
> 		at org.apache.accumulo.server.master.state.DeadServerList.getList(DeadServerList.java:52)
> 		at org.apache.accumulo.master.MasterClientServiceHandler.getMasterStats(MasterClientServiceHandler.java:268)
> 		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 		at java.lang.reflect.Method.invoke(Method.java:597)
> 		at org.apache.accumulo.trace.instrument.thrift.TraceWrap$1.invoke(TraceWrap.java:63)
> 		at com.sun.proxy.$Proxy11.getMasterStats(Unknown Source)
> 		at org.apache.accumulo.core.master.thrift.MasterClientService$Processor$getMasterStats.getResult(MasterClientService.java:1414)
> 		at org.apache.accumulo.core.master.thrift.MasterClientService$Processor$getMasterStats.getResult(MasterClientService.java:1398)
> 		at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
> 		at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
> 		at org.apache.accumulo.server.util.TServerUtils$TimedProcessor.process(TServerUtils.java:171)
> 		at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:206)
> 		at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
> 		at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
> 		at java.lang.Thread.run(Thread.java:662){code}



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