[ 
https://issues.apache.org/jira/browse/CASSANDRA-14909?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Dinesh Joshi reassigned CASSANDRA-14909:
----------------------------------------

    Assignee: Sumanth Pasupuleti

> Netty IOExceptions caused by unclean client disconnects being logged at INFO 
> instead of TRACE
> ---------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-14909
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14909
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Sumanth Pasupuleti
>            Assignee: Sumanth Pasupuleti
>            Priority: Minor
>             Fix For: 4.0
>
>
> Observed spam logs on 3.0.17 cluster with redundant Netty IOExceptions caused 
> due to client-side disconnections.
> {code:java}
> INFO  [epollEventLoopGroup-2-28] 2018-11-20 23:23:04,386 Message.java:619 - 
> Unexpected exception during request; channel = [id: 0x12995bc1, 
> L:/xxx.xx.xxx.xxx:7104 - R:/xxx.xx.xxx.xxx:33754]
> io.netty.channel.unix.Errors$NativeIoException: syscall:read(...)() failed: 
> Connection reset by peer
>       at io.netty.channel.unix.FileDescriptor.readAddress(...)(Unknown 
> Source) ~[netty-all-4.0.44.Final.jar:4.0.44.Final]
> {code}
> {code:java}
> INFO  [epollEventLoopGroup-2-23] 2018-11-20 13:16:33,263 Message.java:619 - 
> Unexpected exception during request; channel = [id: 0x98bd7c0e, 
> L:/xxx.xx.xxx.xxx:7104 - R:/xxx.xx.xx.xx:33350]
> io.netty.channel.unix.Errors$NativeIoException: readAddress() failed: 
> Connection timed out
>       at io.netty.channel.unix.Errors.newIOException(Errors.java:117) 
> ~[netty-all-4.0.44.Final.jar:4.0.44.Final]
>       at io.netty.channel.unix.Errors.ioResult(Errors.java:138) 
> ~[netty-all-4.0.44.Final.jar:4.0.44.Final]
>       at 
> io.netty.channel.unix.FileDescriptor.readAddress(FileDescriptor.java:175) 
> ~[netty-all-4.0.44.Final.jar:4.0.44.Final]
>       at 
> io.netty.channel.epoll.AbstractEpollChannel.doReadBytes(AbstractEpollChannel.java:238)
>  ~[netty-all-4.0.44.Final.jar:4.0.44.Final]
>       at 
> io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:926)
>  ~[netty-all-4.0.44.Final.jar:4.0.44.Final]
>       at 
> io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:397) 
> [netty-all-4.0.44.Final.jar:4.0.44.Final]
>       at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:302) 
> [netty-all-4.0.44.Final.jar:4.0.44.Final]
>       at 
> io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131)
>  [netty-all-4.0.44.Final.jar:4.0.44.Final]
>       at 
> io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
>  [netty-all-4.0.44.Final.jar:4.0.44.Final]
> {code}
> [CASSANDRA-7849|https://issues.apache.org/jira/browse/CASSANDRA-7849] 
> addresses this for JAVA IO Exception like "java.io.IOException: Connection 
> reset by peer", but not for Netty IOException since the exception message in 
> Netty includes method name.



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