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https://issues.apache.org/jira/browse/BEAM-5397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16617416#comment-16617416
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Thomas Weise commented on BEAM-5397:
------------------------------------
{code:java}
Exception in thread "grpc-default-worker-ELG-3-2"
java.lang.NoClassDefFoundError:
org/apache/beam/vendor/netty/v4/io/netty/buffer/PoolArena$1
at
org.apache.beam.vendor.netty.v4.io.netty.buffer.PoolArena.freeChunk(PoolArena.java:293)
at
org.apache.beam.vendor.netty.v4.io.netty.buffer.PoolThreadCache$MemoryRegionCache.freeEntry(PoolThreadCache.java:443)
at
org.apache.beam.vendor.netty.v4.io.netty.buffer.PoolThreadCache$MemoryRegionCache.free(PoolThreadCache.java:413)
at
org.apache.beam.vendor.netty.v4.io.netty.buffer.PoolThreadCache$MemoryRegionCache.free(PoolThreadCache.java:405)
at
org.apache.beam.vendor.netty.v4.io.netty.buffer.PoolThreadCache.free(PoolThreadCache.java:262)
at
org.apache.beam.vendor.netty.v4.io.netty.buffer.PoolThreadCache.free(PoolThreadCache.java:253)
at
org.apache.beam.vendor.netty.v4.io.netty.buffer.PoolThreadCache.free(PoolThreadCache.java:226)
at
org.apache.beam.vendor.netty.v4.io.netty.buffer.PooledByteBufAllocator$PoolThreadLocalCache.onRemoval(PooledByteBufAllocator.java:450)
at
org.apache.beam.vendor.netty.v4.io.netty.buffer.PooledByteBufAllocator$PoolThreadLocalCache.onRemoval(PooledByteBufAllocator.java:426)
at
org.apache.beam.vendor.netty.v4.io.netty.util.concurrent.FastThreadLocal.remove(FastThreadLocal.java:269)
at
org.apache.beam.vendor.netty.v4.io.netty.util.concurrent.FastThreadLocal.removeAll(FastThreadLocal.java:68)
at
org.apache.beam.vendor.netty.v4.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:32)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException:
org.apache.beam.vendor.netty.v4.io.netty.buffer.PoolArena$1
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at
org.apache.flink.runtime.execution.librarycache.FlinkUserCodeClassLoaders$ChildFirstClassLoader.loadClass(FlinkUserCodeClassLoaders.java:129)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 13 more{code}
> Flink portable runner GRPC cleanup failure after user class loader was removed
> ------------------------------------------------------------------------------
>
> Key: BEAM-5397
> URL: https://issues.apache.org/jira/browse/BEAM-5397
> Project: Beam
> Issue Type: Improvement
> Components: runner-flink
> Affects Versions: 2.8.0
> Reporter: Thomas Weise
> Priority: Major
> Labels: portability
>
> Looks like another attempt to perform cleanup after close.
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