提交失败重连java_kafka.consumer.SimpleConsumer：由于套接字错误而重新连接：java.nio.channels.ClosedChannelException...

You have closed the channel and are still trying to use it.

There are several issues with your code.

First, your test for EOS is faulty. Remove the limit() == 0 test. That

doesn’t indicate EOS, it just indicates a zero length read, which can

happen in non-blocking mode at any time. It doesn’t mean the peer has

closed his end of the connection, and it doesn’t mean you should close

your end.

Second, closing a channel closes the socket as well. You should close

the channel only, not the socket.

Third, closing a channel cancels the key. You don’t need to follow

every close with a cancel.

You may also have failed to check whether a ready key is valid in the

select loop before using it, e.g. for reading.