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From "Sumanth Pasupuleti (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-14909) Netty IOExceptions caused by unclean client disconnects being logged at INFO instead of TRACE
Date Thu, 22 Nov 2018 17:40:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-14909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16696153#comment-16696153
] 

Sumanth Pasupuleti commented on CASSANDRA-14909:
------------------------------------------------

Relevant code has not changed in trunk, so submitting a patch against trunk
https://github.com/apache/cassandra/pull/294

> 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
>            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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