dajac commented on a change in pull request #11504:
URL: https://github.com/apache/kafka/pull/11504#discussion_r751111771



##########
File path: core/src/main/scala/kafka/network/SocketServer.scala
##########
@@ -734,6 +734,10 @@ private[kafka] class Acceptor(val endPoint: EndPoint,
         val endThrottleTimeMs = e.startThrottleTimeMs + e.throttleTimeMs
         throttledSockets += DelayedCloseSocket(socketChannel, 
endThrottleTimeMs)
         None
+      case e: IOException =>
+        info(s"Encounter IOException", e)
+        closeSocket(socketChannel)

Review comment:
       Another way would be to extract `serverSocketChannel.accept()` into a 
method. Then we could override that method in a test and return a mocked socket 
which throws an exception.




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