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From "David Medinets (JIRA)" <>
Subject [jira] [Created] (ACCUMULO-693) Too Many "Problem Renewing Lease" Messages
Date Sun, 15 Jul 2012 02:18:34 GMT
David Medinets created ACCUMULO-693:

             Summary: Too Many "Problem Renewing Lease" Messages
                 Key: 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(
        at org.apache.hadoop.hdfs.server.namenode.NameNode.renewLease(
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(
        at java.lang.reflect.Method.invoke(
        at org.apache.hadoop.ipc.RPC$
        at org.apache.hadoop.ipc.Server$Handler$
        at org.apache.hadoop.ipc.Server$Handler$
        at Method)
        at org.apache.hadoop.ipc.Server$

        at org.apache.hadoop.ipc.RPC$Invoker.invoke(
        at $Proxy0.renewLease(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(
        at java.lang.reflect.Method.invoke(
        at $Proxy0.renewLease(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient$LeaseChecker.renew(
        at org.apache.hadoop.hdfs.DFSClient$

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