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  1. Minecraft: Java Edition
  2. MC-231361

Occasional exceptionCaught() event: java.nio.channels.ClosedChannelException: null when interacting with multiplayer servers

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • None
    • 1.17, 1.17.1, 1.18.1, 1.19, 1.19.2, 23w16a
    • None
    • Community Consensus
    • Networking

      The bug

      Occasionally, when interacting with multiplayer servers (probably on the server list, but I'm not completely sure), the following error is logged in the game log.

      [Netty Client IO #1/WARN]: An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
      java.nio.channels.ClosedChannelException: null
      	at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
      [Netty Client IO #2/WARN]: An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
      java.nio.channels.ClosedChannelException: null
      	at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
      

      I'm unsure of the significance of this issue, but I have experienced the issue multiple times within the past few days and it didn't seem to have an impact on the game.

            Unassigned Unassigned
            markderickson [Mod] markderickson
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              Created:
              Updated:
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