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https://issues.apache.org/jira/browse/CASSANDRA-13649?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Norman Maurer updated CASSANDRA-13649:
--------------------------------------
Labels: patch (was: )
Assignee: Norman Maurer
Status: Patch Available (was: Open)
To ensure we handle all exceptions in the netty pipeline that are produced by
either the Channel itself or the ChannelHandlers in the pipeline we need to
ensure the handlers that does so not uses the RequestThreadPoolExecutor as it
not enforces strict ordering of the events per Channel.
> Uncaught exceptions in Netty pipeline
> -------------------------------------
>
> Key: CASSANDRA-13649
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13649
> Project: Cassandra
> Issue Type: Bug
> Components: Streaming and Messaging, Testing
> Reporter: Stefan Podkowinski
> Assignee: Norman Maurer
> Labels: patch
> Attachments: test_stdout.txt
>
>
> I've noticed some netty related errors in trunk in [some of the dtest
> results|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/106/#showFailuresLink].
> Just want to make sure that we don't have to change anything related to the
> exception handling in our pipeline and that this isn't a netty issue.
> Actually if this causes flakiness but is otherwise harmless, we should do
> something about it, even if it's just on the dtest side.
> {noformat}
> WARN [epollEventLoopGroup-2-9] 2017-06-28 17:23:49,699 Slf4JLogger.java:151
> - An exceptionCaught() event was fired, and it reached at the tail of the
> pipeline. It usually means the last handler in the pipeline did not handle
> the exception.
> io.netty.channel.unix.Errors$NativeIoException: syscall:read(...)() failed:
> Connection reset by peer
> at io.netty.channel.unix.FileDescriptor.readAddress(...)(Unknown
> Source) ~[netty-all-4.0.44.Final.jar:4.0.44.Final]
> {noformat}
> And again in another test:
> {noformat}
> WARN [epollEventLoopGroup-2-8] 2017-06-29 02:27:31,300 Slf4JLogger.java:151
> - An exceptionCaught() event was fired, and it reached at the tail of the
> pipeline. It usually means the last handler in the pipeline did not handle
> the exception.
> io.netty.channel.unix.Errors$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]
> {noformat}
> Edit:
> The {{io.netty.channel.unix.Errors$NativeIoException: syscall:read(...)()
> failed}} error also causes tests to fail for 3.0 and 3.11.
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