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https://issues.apache.org/jira/browse/HADOOP-10180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13855827#comment-13855827
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Jing Zhao commented on HADOOP-10180:
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Hi Ravi, so which version of hadoop are you using? When you added new disks to
DNs, I guess you also restarted NN right? Then you may also want to check the
NN log to see if a block with Block ID blk_-8997395530627676954_276834 has
already been successfully created before you restarted NN. If yes, HDFS-5590
may be related.
> Getting some error while increasing the hadoop cluster size.
> -------------------------------------------------------------
>
> Key: HADOOP-10180
> URL: https://issues.apache.org/jira/browse/HADOOP-10180
> Project: Hadoop Common
> Issue Type: Task
> Reporter: Ravi Hemnani
> Priority: Trivial
>
> We have a 5-node hadoop cluster and we are trying to increase the size of the
> cluster. We have added 2 new disks to each of the 5-boxes and we followed all
> the steps of putting the disk to the hadoop cluster. Everything works fine
> except when we restart a datanode, there are errors multiple times in the log
> file. Following is the error which appears in the log files,
> 2013-12-23 14:32:19,406 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode:
> DatanodeRegistration(172.16.200.128:50010,
> storageID=DS-1937554000-172.16.200.128-50010-1376068931321, infoPort=50075,
> ipcPort=50020):DataXceiver
> org.apache.hadoop.hdfs.server.datanode.BlockAlreadyExistsException: Block
> blk_-8997395530627676954_276834 is valid, and cannot be written to.
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset.writeToBlock(FSDataset.java:1428)
> at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.<init>(BlockReceiver.java:114)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:302)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:112)
> at java.lang.Thread.run(Thread.java:724)
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