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https://issues.apache.org/jira/browse/LIVY-805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gyorgy Gal updated LIVY-805:
----------------------------
Fix Version/s: 0.10.0
(was: 0.9.0)
This issue has been moved to the 0.10.0 release as part of a bulk update. If
you feel this is moved out inappropriately, feel free to provide justification
and reset the Fix Version to 0.9.0.
> Livy starts throwing java.lang.IllegalStateException: failed to create a
> child event loop
> -----------------------------------------------------------------------------------------
>
> Key: LIVY-805
> URL: https://issues.apache.org/jira/browse/LIVY-805
> Project: Livy
> Issue Type: Bug
> Components: Server
> Affects Versions: 0.7.0
> Environment: EMR 6.2.0
> Reporter: Dhiraj Soni
> Priority: Critical
> Fix For: 0.10.0
>
> Attachments: livy_webserver_logs.txt
>
>
> I have a worker which keeps launching spark sessions and polling for its
> completion. This runs fine for a while but then suddenly Livy starts throwing
>
> ```
> java.lang.IllegalStateException: failed to create a child event loop
> at
> io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
> at
> io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
> at
> io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
> at
> io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:59)
> at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
> at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
> at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
> ```
> Full stack trace attached
>
> There aren't a lot of concurrent sessions running as well. At most 5 sessions
> running concurrently.
> This happens intermittently.
>
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