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Date: Wed, 29 Mar 2017 21:37:41 +0000 (UTC)
From: "Daniel Templeton (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.13060174.1490823361000.158969.1490823461708@Atlassian.JIRA>
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Subject: [jira] [Updated] (HDFS-11593) Change
 SimpleHttpProxyHandler#exceptionCaught log level from info to debug
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archived-at: Wed, 29 Mar 2017 21:37:46 -0000


     [ https://issues.apache.org/jira/browse/HDFS-11593?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Templeton updated HDFS-11593:
------------------------------------
    Labels: newbie  (was: )

> Change SimpleHttpProxyHandler#exceptionCaught log level from info to debug
> --------------------------------------------------------------------------
>
>                 Key: HDFS-11593
>                 URL: https://issues.apache.org/jira/browse/HDFS-11593
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>            Reporter: Xiaoyu Yao
>            Assignee: Xiaobing Zhou
>            Priority: Minor
>              Labels: newbie
>
> A busy datanode may have many client disconnect exception logged with stack like below, which does not provide much useful information. Propose to reduce the log level from info to debug.
> {code}
> 2017-03-29 20:28:55,225 INFO  web.DatanodeHttpServer (SimpleHttpProxyHandler.java:exceptionCaught(147)) - Proxy for / failed. cause: 
> java.io.IOException: Connection reset by peer
> 	at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
> 	at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
> 	at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
> 	at sun.nio.ch.IOUtil.read(IOUtil.java:192)
> 	at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
> 	at io.netty.buffer.UnpooledUnsafeDirectByteBuf.setBytes(UnpooledUnsafeDirectByteBuf.java:446)
> 	at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:881)
> 	at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:225)
> 	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:119)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
> 	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
> 	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
> 	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
> 	at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
> 	at java.lang.Thread.run(Thread.java:745)
> {code}


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