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From "Mukul Kumar Singh (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11533) reuseAddress option should be used for child channels in Portmap and SimpleTcpServer
Date Wed, 15 Mar 2017 17:54:41 GMT
Mukul Kumar Singh created HDFS-11533:
----------------------------------------

             Summary: 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


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


{noformat}
Started listening to UDP requests at port 4242 for Rpc program: mountd at localhost:4242 with
workerCount 1\n2017-03-13 07:11:52,970 FATAL mount.MountdBase (MountdBase.java:startTCPServer(85))
- 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)\n2017-03-13
07:11:52,984 INFO  util.ExitUtil (ExitUtil.java:terminate(124)) - Exiting with status 1\n2017-03-13
07:11:52,987 INFO  nfs3.Nfs3Base (LogAdapter.java:info(45)) - SHUTDOWN_MSG: 
{noformat}




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