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From Alexandre Fouché (JIRA) <j...@apache.org>
Subject [jira] [Commented] (HDFS-4201) NPE in BPServiceActor#sendHeartBeat
Date Fri, 25 Jan 2013 17:37:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13562860#comment-13562860

Alexandre Fouché commented on HDFS-4201:

I had the same error messages, and i worked around it by adding a second volume. Not sure
if it was same issue, so i created HDFS-4442 to describe 
> NPE in BPServiceActor#sendHeartBeat
> -----------------------------------
>                 Key: HDFS-4201
>                 URL: https://issues.apache.org/jira/browse/HDFS-4201
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>            Reporter: Eli Collins
> Saw the following NPE in a log.
> Think this is likely due to {{dn}} or {{dn.getFSDataset()}} being null, (not {{bpRegistration}})
due to a configuration or local directory failure.
> {code}
> 2012-09-25 04:33:20,782 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: For namenode
of 21600000msec Initial delay: 0msec; heartBeatInterval=3000
> 2012-09-25 04:33:20,782 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: Exception
in BPOfferService for Block pool BP-1678908700- (storage id DS-1031100678-
service to svsrs00127/
> java.lang.NullPointerException
>         at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.sendHeartBeat(BPServiceActor.java:434)
>         at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:520)
>         at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:673)
>         at java.lang.Thread.run(Thread.java:722)
> {code}

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