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https://issues.apache.org/jira/browse/HADOOP-3434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598860#action_12598860
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Steve Loughran commented on HADOOP-3434:
----------------------------------------
The patch changes the output to :
Caused by: java.net.BindException: Problem binding to localhost/127.0.0.1:8022
: Address already in use
at org.apache.hadoop.ipc.Server.bind(Server.java:168)
at org.apache.hadoop.dfs.DataNode.startDataNode(DataNode.java:279)
at org.apache.hadoop.dfs.DataNode.(DataNode.java:185)
at org.apache.hadoop.dfs.ExtDataNode.(ExtDataNode.java:55)
at
org.smartfrog.services.hadoop.components.datanode.DatanodeImpl.sfStart(DatanodeImpl.java:60)
Caused by: java.net.BindException: Address already in use
at sun.nio.ch.Net.bind(Native Method)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
at org.apache.hadoop.ipc.Server.bind(Server.java:166)
I havent supplied a test; you'd need to bring up two data nodes listening on
the same port to test it. I could add a test for this in my project.
> Retain cause of bind failure in Server.bind
> -------------------------------------------
>
> Key: HADOOP-3434
> URL: https://issues.apache.org/jira/browse/HADOOP-3434
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Affects Versions: 0.18.0
> Reporter: Steve Loughran
> Attachments: hadoop-3434.patch
>
>
> When a datanode can't start listening on a port, there's no explanation why;
> the message/stack is lost:
> Caused by: java.net.BindException: Problem binding to localhost/127.0.0.1:8022
> at org.apache.hadoop.ipc.Server.bind(Server.java:168)
> at org.apache.hadoop.dfs.DataNode.startDataNode(DataNode.java:279)
> at org.apache.hadoop.dfs.DataNode.(DataNode.java:185)
> at org.apache.hadoop.dfs.ExtDataNode.(ExtDataNode.java:55)
> at
> org.smartfrog.services.hadoop.components.datanode.DatanodeImpl.sfStart(DatanodeImpl.java:60)
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