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https://issues.apache.org/jira/browse/HDFS-3328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13270516#comment-13270516
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Eli Collins commented on HDFS-3328:
-----------------------------------
Thanks Daryn. This puts the behavior back as it was previously - metrics and
toString previously used the xfer port. It would only matter if people care
about the particular port value in the "DataNodeActivity-<hostname>-<port>"
key. I suspect most people care about the hostname, the port is used to make it
unique for the case of running multiple DNs on the same host.
> NPE in DataNode.getIpcPort
> --------------------------
>
> Key: HDFS-3328
> URL: https://issues.apache.org/jira/browse/HDFS-3328
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 2.0.0
> Reporter: Uma Maheswara Rao G
> Assignee: Eli Collins
> Priority: Minor
> Attachments: hdfs-3328.txt
>
>
> While running the tests, I have seen this exceptions.Tests passed.
> Not sure this is a problem.
> {quote}
> 2012-04-26 23:15:51,763 WARN hdfs.DFSClient (DFSOutputStream.java:run(710))
> - DFSOutputStream ResponseProcessor exception for block
> BP-1372255573-49.249.124.17-1335462329685:blk_-8435040801555580201_1005
> java.io.EOFException: Premature EOF: no length prefix available
> at
> org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:162)
> at
> org.apache.hadoop.hdfs.protocol.datatransfer.PipelineAck.readFields(PipelineAck.java:95)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer$ResponseProcessor.run(DFSOutputStream.java:657)
> Exception in thread "DataXceiver for client /127.0.0.1:52323 [Cleaning up]"
> java.lang.NullPointerException
> at org.apache.hadoop.ipc.Server$Listener.getAddress(Server.java:669)
> at org.apache.hadoop.ipc.Server.getListenerAddress(Server.java:1988)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.getIpcPort(DataNode.java:882)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.getDisplayName(DataNode.java:863)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:171)
> at java.lang.Thread.run(Unknown Source){quote}
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