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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