Xiaoyu Yao created HDFS-11593:
---------------------------------
Summary: 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
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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