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From "John Vines (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-693) Too Many "Problem Renewing Lease" Messages
Date Sun, 15 Jul 2012 02:31:33 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13414563#comment-13414563
] 

John Vines commented on ACCUMULO-693:
-------------------------------------

it looks like your hdfs is in safe mode. We intentionally leave it polling for when hdfs is
available.
                
> Too Many "Problem Renewing Lease" Messages
> ------------------------------------------
>
>                 Key: ACCUMULO-693
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-693
>             Project: Accumulo
>          Issue Type: Improvement
>    Affects Versions: 1.5.0
>            Reporter: David Medinets
>            Priority: Minor
>
> I restarted Hadoop and reloaded my Accumulo monitor page. Then the exception below starting
appearing in my tserver log - a lot. Does it make sense to try three times with increasing
pauses between the attempts? Should the web page timeout an display an error message?
> 15 02:14:32,694 [hdfs.DFSClient] WARN : Problem renewing lease for DFSClient_134996827
> org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.namenode.SafeModeException:
Cannot renew lease for DFSClient_134996827. Name node is in safe mode.
> The ratio of reported blocks 0.8750 has not reached the threshold 0.9990. Safe mode will
be turned off automatically.
>         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.renewLease(FSNamesystem.java:1978)
>         at org.apache.hadoop.hdfs.server.namenode.NameNode.renewLease(NameNode.java:550)
>         at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:601)
>         at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:415)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)
>         at org.apache.hadoop.ipc.Client.call(Client.java:740)
>         at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
>         at $Proxy0.renewLease(Unknown Source)
>         at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>         at java.lang.reflect.Method.invoke(Method.java:601)
>         at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
>         at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
>         at $Proxy0.renewLease(Unknown Source)
>         at org.apache.hadoop.hdfs.DFSClient$LeaseChecker.renew(DFSClient.java:1057)
>         at org.apache.hadoop.hdfs.DFSClient$LeaseChecker.run(DFSClient.java:1069)
>         at java.lang.Thread.run(Thread.java:722)

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