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https://issues.apache.org/jira/browse/FLINK-7845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16249366#comment-16249366
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Flavio Pompermaier commented on FLINK-7845:
-------------------------------------------
Updated scala to 2.11.
Maybe it could be a good idea to remove 2.10 jars from snapshots repo to avoid
such errors..the compilation problem was caused by the fact that now jackson
classes are shaded and should be imported with
org.apache.flink.shaded.jackson2.*.
>From my point of view, this example is already stripped down (from my original
>code) to a minimal version..from now on I don't know what I can further remove
> Netty Exception when submitting batch job repeatedly
> ----------------------------------------------------
>
> Key: FLINK-7845
> URL: https://issues.apache.org/jira/browse/FLINK-7845
> Project: Flink
> Issue Type: Bug
> Components: Core, Network
> Affects Versions: 1.3.2
> Reporter: Flavio Pompermaier
>
> We had some problems with Flink and Netty so we wrote a small unit test to
> reproduce the memory issues we have in production. It happens that we have to
> restart the Flink cluster because the memory is always increasing from job to
> job.
> The github project is https://github.com/okkam-it/flink-memory-leak and the
> JUnit test is contained in the MemoryLeakTest class (within src/main/test).
> I don't know if this is the root of our problems but at some point, usually
> around the 28th loop, the job fails with the following exception (actually we
> never faced that in production but maybe is related to the memory issue
> somehow...):
> {code:java}
> Caused by: java.lang.IllegalAccessError:
> org/apache/flink/runtime/io/network/netty/NettyMessage
> at
> io.netty.util.internal.__matchers__.org.apache.flink.runtime.io.network.netty.NettyMessageMatcher.match(NoOpTypeParameterMatcher.java)
> at
> io.netty.channel.SimpleChannelInboundHandler.acceptInboundMessage(SimpleChannelInboundHandler.java:95)
> at
> io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:102)
> ... 16 more
> {code}
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