Flavio Pompermaier created FLINK-7845:
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Summary: 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
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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