The Bug
When trying to spawning zombies (and their variants) sometimes failed to spawning and throw unexpected error.
[23:56:39] [Server thread/ERROR]: Failed to handle packet aid@b592589, suppressing error
java.lang.IllegalArgumentException: Modifier is already applied on this attribute!
at buq.e(SourceFile:77) ~[24w21a.jar:?]
at buq.c(SourceFile:97) ~[24w21a.jar:?]
at cku.H(SourceFile:555) ~[24w21a.jar:?]
at cku.a(SourceFile:541) ~[24w21a.jar:?]
at bsw.b(SourceFile:447) ~[24w21a.jar:?]
at bsw.a(SourceFile:413) ~[24w21a.jar:?]
at bsw.a(SourceFile:376) ~[24w21a.jar:?]
at cvy.a(SourceFile:86) ~[24w21a.jar:?]
at cuo.a(SourceFile:373) ~[24w21a.jar:?]
at aqv.a(SourceFile:372) ~[24w21a.jar:?]
at art.a(SourceFile:1147) ~[24w21a.jar:?]
at aid.a(SourceFile:42) ~[24w21a.jar:?]
at aid.a(SourceFile:10) ~[24w21a.jar:?]
at zi.a(SourceFile:27) ~[24w21a.jar:?]
at alm.run(SourceFile:18) ~[24w21a.jar:?]
at bpg.d(SourceFile:162) ~[24w21a.jar:?]
at bpk.d(SourceFile:23) ~[24w21a.jar:?]
at net.minecraft.server.MinecraftServer.b(SourceFile:859) ~[24w21a.jar:?]
at net.minecraft.server.MinecraftServer.d(SourceFile:168) ~[24w21a.jar:?]
at bpg.B(SourceFile:136) ~[24w21a.jar:?]
at net.minecraft.server.MinecraftServer.bv(SourceFile:841) ~[24w21a.jar:?]
at net.minecraft.server.MinecraftServer.B(SourceFile:835) ~[24w21a.jar:?]
at bpg.bB(SourceFile:121) ~[24w21a.jar:?]
at net.minecraft.server.MinecraftServer.v_(SourceFile:809) ~[24w21a.jar:?]
at net.minecraft.server.MinecraftServer.y(SourceFile:697) ~[24w21a.jar:?]
at net.minecraft.server.MinecraftServer.a(SourceFile:276) ~[24w21a.jar:?]
at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]
To reproduce
Spawning zombies by any means.
Expected behavior
Zombies successfully spawned and no error.
Observed behavior
Zombies fail to spawned and throw unexpected error.
Thank you for your report!
We're tracking this issue in MC-272321, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Fixed. Please check the Fix Version/s field in that ticket to see in which version this behavior was or will be fixed.
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