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From "Jitendra Nath Pandey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11533) reuseAddress option should be used for child channels in Portmap and SimpleTcpServer
Date Thu, 16 Mar 2017 19:39:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15928710#comment-15928710
] 

Jitendra Nath Pandey commented on HDFS-11533:
---------------------------------------------

I have committed this to trunk and branch-2. Thanks to [~msingh].

> reuseAddress option should be used for child channels in Portmap and SimpleTcpServer
> ------------------------------------------------------------------------------------
>
>                 Key: HDFS-11533
>                 URL: https://issues.apache.org/jira/browse/HDFS-11533
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: nfs
>            Reporter: Mukul Kumar Singh
>            Assignee: Mukul Kumar Singh
>             Fix For: 2.9.0, 3.0.0-alpha3
>
>         Attachments: HDFS-11533.001.patch
>
>
> Bind can fail in SimpleTcpServer because reuseAddress option is not used for child channels.
Binding to the port for child channels can fail because this option is currently only set
for parent channel.
> This options is not needed in SimpleUdpServer, Portmap(udpServer)
> as they use ConnectionlessBootstrap, where the child option is not needed
> https://docs.jboss.org/netty/3.2/api/org/jboss/netty/bootstrap/ConnectionlessBootstrap.html
> However Portmap(tcpServer) and SimpleTcpServer
> uses ServerBootstrap, where the child option is needed
> https://docs.jboss.org/netty/3.2/api/org/jboss/netty/bootstrap/ServerBootstrap.html
> {code:java}
> Failed to start the TCP server.\norg.jboss.netty.channel.ChannelException: Failed to
bind to: 0.0.0.0/0.0.0.0:4242\n\tat org.jboss.netty.bootstrap.ServerBootstrap.bind(ServerBootstrap.java:272)\n\tat
org.apache.hadoop.oncrpc.SimpleTcpServer.run(SimpleTcpServer.java:87)\n\tat org.apache.hadoop.mount.MountdBase.startTCPServer(MountdBase.java:83)\n\tat
org.apache.hadoop.mount.MountdBase.start(MountdBase.java:98)\n\tat org.apache.hadoop.hdfs.nfs.nfs3.Nfs3.startServiceInternal(Nfs3.java:56)\n\tat
org.apache.hadoop.hdfs.nfs.nfs3.Nfs3.startService(Nfs3.java:69)\n\tat org.apache.hadoop.hdfs.nfs.nfs3.PrivilegedNfsGatewayStarter.start(PrivilegedNfsGatewayStarter.java:71)\n\tat
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat
java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.apache.commons.daemon.support.DaemonLoader.start(DaemonLoader.java:243)\nCaused
by: java.net.BindException: Address already in use\n\tat sun.nio.ch.Net.bind0(Native Method)\n\tat
sun.nio.ch.Net.bind(Net.java:433)\n\tat sun.nio.ch.Net.bind(Net.java:425)\n\tat sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)\n\tat
sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)\n\tat org.jboss.netty.channel.socket.nio.NioServerBoss$RegisterTask.run(NioServerBoss.java:193)\n\tat
org.jboss.netty.channel.socket.nio.AbstractNioSelector.processTaskQueue(AbstractNioSelector.java:366)\n\tat
org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:290)\n\tat
org.jboss.netty.channel.socket.nio.NioServerBoss.run(NioServerBoss.java:42)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)\n\tat
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)\n\tat java.lang.Thread.run(Thread.java:745)\n
> {code}



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