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https://issues.apache.org/jira/browse/HDFS-11525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15904443#comment-15904443
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Mukul Kumar Singh commented on HDFS-11525:
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Hi yuxh,
Can you please paste the entire stack trace, current stack trace doesn't
provide enough information to identify the function where bind was issued ?
> "Address already in use" has no exact conflict information
> ----------------------------------------------------------
>
> Key: HDFS-11525
> URL: https://issues.apache.org/jira/browse/HDFS-11525
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.7.3
> Reporter: yuxh
>
> when I found datanode didnot start successful, I checked log :
> 2017-03-10 09:36:08,455 FATAL
> org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in secureMain
> java.net.BindException: Address already in use
> at sun.nio.ch.Net.bind0(Native Method)
> at sun.nio.ch.Net.bind(Net.java:433)
> at sun.nio.ch.Net.bind(Net.java:425)
> which doesn't show which port has been used. I have to try in another machine
> to find port 50075 is need to start up datanode.
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