carlvine500 opened a new issue, #5899:
URL: https://github.com/apache/rocketmq/issues/5899
**BUG REPORT**
1. Please describe the issue you observed:
- What did you do (The steps to reproduce)
run rocketmq4.9 in docker with lots of topic and consumerGroup for about 1
week ,
- What is expected to see?
can produce message and consume message
- What did you see instead?
produce or consume message timeout
there some error in broker_default.log:
```
2023-01-17 11:57:57 WARN NettyNIOBoss_1 - An exceptionCaught() event was
fired, and it reached at the tail of the pipeline. It us
ually means the last handler in the pipeline did not handle the exception.
java.io.IOException: No file descriptors available
at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
at
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)
at
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)
at io.netty.util.internal.SocketUtils$5.run(SocketUtils.java:119)
at io.netty.util.internal.SocketUtils$5.run(SocketUtils.java:116)
at java.security.AccessController.doPrivileged(Native Method)
at io.netty.util.internal.SocketUtils.accept(SocketUtils.java:116)
at
io.netty.channel.socket.nio.NioServerSocketChannel.doReadMessages(NioServerSocketChannel.java:154)
at
io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:79)
at
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496)
at
io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:995)
at
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.lang.Thread.run(Thread.java:748)
```
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