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From "Syed Akram (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9124) NullPointerException when underreplicated blocks are there
Date Tue, 22 Sep 2015 17:44:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14903060#comment-14903060
] 

Syed Akram commented on HDFS-9124:
----------------------------------

when under replicated blocks are transferring from source to destination datanode, and the
destination is stopped while replicating the block, then this issue has been occured.

> NullPointerException when underreplicated blocks are there
> ----------------------------------------------------------
>
>                 Key: HDFS-9124
>                 URL: https://issues.apache.org/jira/browse/HDFS-9124
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.7.1
>            Reporter: Syed Akram
>            Assignee: Syed Akram
>
> 2015-09-22 09:48:47,830 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: dn1:50010:DataXceiver
error processing WRITE_BLOCK operation  src: /dn1:42973 dst: /dn2:50010
> java.lang.NullPointerException
>         at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.<init>(BlockReceiver.java:186)
>         at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:677)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:137)
>         at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:74)
>         at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:251)
>         at java.lang.Thread.run(Thread.java:744)



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