Till Rohrmann created FLINK-9860:
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Summary: Netty resource leak on receiver side
Key: FLINK-9860
URL: https://issues.apache.org/jira/browse/FLINK-9860
Project: Flink
Issue Type: Bug
Components: Network
Affects Versions: 1.6.0
Reporter: Till Rohrmann
Assignee: Nico Kruber
Fix For: 1.6.0
The Hadoop-free Wordcount end-to-end test fails with the following exception:
{code}
ERROR org.apache.flink.shaded.netty4.io.netty.util.ResourceLeakDetector -
LEAK: ByteBuf.release() was not called before it's garbage-collected. See
http://netty.io/wiki/reference-counted-objects.html for more information.
Recent access records:
Created at:
org.apache.flink.shaded.netty4.io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:331)
org.apache.flink.shaded.netty4.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:185)
org.apache.flink.shaded.netty4.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:176)
org.apache.flink.shaded.netty4.io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:137)
org.apache.flink.shaded.netty4.io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator$MaxMessageHandle.allocate(DefaultMaxMessagesRecvByteBufAllocator.java:114)
org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:147)
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645)
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580)
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497)
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459)
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
org.apache.flink.shaded.netty4.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
{code}
We might have a resource leak on the receiving side of our network stack.
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