[jira] [Created] (CASSANDRA-7849) Server logged error messages for unexpected exceptions could be more helpful

["graham sanderson (JIRA)" <ji...@apache.org>]

graham sanderson created CASSANDRA-7849:
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             Summary: Server logged error messages for unexpected exceptions could be more helpful
                 Key: CASSANDRA-7849
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7849
             Project: Cassandra
          Issue Type: Improvement
            Reporter: graham sanderson


>From time to time (actually quite frequently) we get error messages in the server logs like this

{code}
ERROR [Native-Transport-Requests:288] 2014-08-29 04:48:07,118 ErrorMessage.java (line 222) Unexpected exception during request
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:379)
        at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:64)
        at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:109)
        at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312)
        at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:90)
        at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
{code}

These particular cases are almost certainly problems with the client driver, client machine, client process, however after the fact this particular exception is practically impossible to debug



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