Uploaded image for project: 'Minecraft: Java Edition'
  1. Minecraft: Java Edition
  2. MC-132663

Command blocks kick player when entering certain commands > 256 characters in multiplayer

XMLWordPrintable

    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 18w30a
    • Minecraft 1.13-pre6, Minecraft 1.13-pre8, Minecraft 1.13
    • Java 1.8.0_51 64 Bit
      3072MB Memory Allocated
      CPU: AMD fx-8350 8 core @4.0GHz
      GPU: AMD RX 480 8GB

      Win10 Enterprise N v1803

      Multiplayer only
    • Confirmed

      The bug

      While entering certain commands in a command block on a multiplayer server the client is kicked:

      Internal Exception: io.netty.handler.codec.DecoderException: The received string length is longer than maximum allowed (265 > 256)

      Apparently not every string causes this, for example 32500 * "a", or /say with a similar large text works fine.

      How to reproduce

      1. Enter the following command 
        execute if entity @e[type=!minecraft:player,name=Apprentice,tag=!Apprentice] as @e[type=!minecraft:player,name=Apprentice,tag=!Apprentice] at @s run advancement grant @p[distance=..10] only elkia:starwars/sithapprenticeaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
      2. Place the cursor right behind the last character ("e") type a character, for example another "a"

        1. image-2018-07-04-16-59-25-263.png
          image-2018-07-04-16-59-25-263.png
          82 kB

            boq [Mojang] Bartosz Bok
            caoimhin10 Caoimhin Doyle
            Votes:
            8 Vote for this issue
            Watchers:
            6 Start watching this issue

              Created:
              Updated:
              Resolved:
              CHK: