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  1. Minecraft: Java Edition
  2. MC-173176

Serialization error affecting operators list and whitelist


    • Icon: Bug Bug
    • Resolution: Fixed
    • 20w10a
    • 20w09a
    • None
    • Multiplayer
    • Confirmed
    • Player
    • Important

      The bug

        [20:52:28] [Server thread/WARN]: Failed to save operators list: 
      java.lang.IllegalArgumentException: class zu declares multiple JSON fields named a
              at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:170) ~[server.jar:?]
              at zw.f(SourceFile:114) ~[server.jar:?]
              at wg.B(SourceFile:114) [server.jar:?]
              at wg.<init>(SourceFile:31) [server.jar:?]
              at wh.d(SourceFile:186) [server.jar:?]
              at net.minecraft.server.MinecraftServer.run(SourceFile:634) [server.jar:?]
              at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]

      Original Description

      So i try to add players as op on my server and it says the following message: An unexpected error occurred trying to execute that command
      and when i try again it says: Nothing changed. The player already is an operator.

      But the problem is that the op text file is empty

        1. Annotation 2020-02-26 202622.png
          69 kB
          Valtteri Venäläinen
        2. first_log.txt
          3 kB
          Frisk Dreemurr

            boq [Mojang] Bartosz Bok
            TheViemo Valtteri Venäläinen
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