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https://issues.apache.org/jira/browse/HDFS-11525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15905520#comment-15905520
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Surendra Singh Lilhore commented on HDFS-11525:
-----------------------------------------------
Hi [~yuxh00],
I tried in 2.7.2 and it is giving clear exception message. Which version you
are using ?
{noformat}
2017-03-10 23:58:58,151 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode:
Exception in secureMain
java.net.BindException: Problem binding to [0.0.0.0:9870]
java.net.BindException: Address already in use; For more details see:
http://wiki.apache.org/hadoop/BindException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:815)
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:735)
at
org.apache.hadoop.hdfs.server.datanode.web.DatanodeHttpServer.start(DatanodeHttpServer.java:232)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.startInfoServer(DataNode.java:916)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:1363)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:495)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:2694)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:2597)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:2644)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:2788)
at
org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:2812)
Caused by: java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:437)
at sun.nio.ch.Net.bind(Net.java:429)
{noformat}
> "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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