Mukul Kumar Singh created HDFS-11479:
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             Summary: Socket re-use address option should be used in 
                 Key: HDFS-11479
                 URL: https://issues.apache.org/jira/browse/HDFS-11479
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: nfs
            Reporter: Mukul Kumar Singh
            Assignee: Mukul Kumar Singh


Nfs gateway restart can fail because of bind error in SimpleUdpServer.

re-use address option should be used in SimpleUdpServer to so that socket bind 
can happen when it is in TIME_WAIT state




2017-02-28 04:19:53,495 FATAL mount.MountdBase 
(MountdBase.java:startUDPServer(66)) - Failed to start the UDP server.
org.jboss.netty.channel.ChannelException: Failed to bind to: 
0.0.0.0/0.0.0.0:4242
        at 
org.jboss.netty.bootstrap.ConnectionlessBootstrap.bind(ConnectionlessBootstrap.java:204)
        at org.apache.hadoop.oncrpc.SimpleUdpServer.run(SimpleUdpServer.java:68)
        at org.apache.hadoop.mount.MountdBase.startUDPServer(MountdBase.java:64)
        at org.apache.hadoop.mount.MountdBase.start(MountdBase.java:97)
        at 
org.apache.hadoop.hdfs.nfs.nfs3.Nfs3.startServiceInternal(Nfs3.java:56)
        at org.apache.hadoop.hdfs.nfs.nfs3.Nfs3.startService(Nfs3.java:69)
        at 
org.apache.hadoop.hdfs.nfs.nfs3.PrivilegedNfsGatewayStarter.start(PrivilegedNfsGatewayStarter.java:71)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.commons.daemon.support.DaemonLoader.start(DaemonLoader.java:243)
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:433)
        at sun.nio.ch.DatagramChannelImpl.bind(DatagramChannelImpl.java:691)
        at sun.nio.ch.DatagramSocketAdaptor.bind(DatagramSocketAdaptor.java:91)
        at 
org.jboss.netty.channel.socket.nio.NioDatagramPipelineSink.bind(NioDatagramPipelineSink.java:129)
        at 
org.jboss.netty.channel.socket.nio.NioDatagramPipelineSink.eventSunk(NioDatagramPipelineSink.java:77)
        at org.jboss.netty.channel.Channels.bind(Channels.java:561)
        at 
org.jboss.netty.channel.AbstractChannel.bind(AbstractChannel.java:189)
        at 
org.jboss.netty.bootstrap.ConnectionlessBootstrap.bind(ConnectionlessBootstrap.java:198)
        ... 11 more





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