Mojira Archive
MC-248491

Players can crash server just by connecting

A new player joined several times until they were banned, each time, starting roughly a second after they connected, the following error began being spamming in console and all players were disconnected. Only restarting the server seemed to resolve the issue once started. The server was able to stop and save its state.

[15:41:53] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: Cannot read field "b" because "this.y" is null
    at aea.a(SourceFile:427) ~[server-1.18.1.jar:?]
    at uy.a(SourceFile:24) ~[server-1.18.1.jar:?]
    at uy.a(SourceFile:6) ~[server-1.18.1.jar:?]
    at qt.a(SourceFile:21) ~[server-1.18.1.jar:?]
    at yx.run(SourceFile:18) ~[server-1.18.1.jar:?]
    at auh.c(SourceFile:151) ~[server-1.18.1.jar:?]
    at aul.c(SourceFile:23) ~[server-1.18.1.jar:?]
    at net.minecraft.server.MinecraftServer.b(SourceFile:780) ~[server-1.18.1.jar:?]
    at net.minecraft.server.MinecraftServer.c(SourceFile:162) ~[server-1.18.1.jar:?]
    at auh.y(SourceFile:125) ~[server-1.18.1.jar:?]
    at net.minecraft.server.MinecraftServer.bf(SourceFile:762) ~[server-1.18.1.jar:?]
    at net.minecraft.server.MinecraftServer.y(SourceFile:756) ~[server-1.18.1.jar:?]
    at auh.bp(SourceFile:110) ~[server-1.18.1.jar:?]
    at net.minecraft.server.MinecraftServer.x(SourceFile:740) ~[server-1.18.1.jar:?]
    at net.minecraft.server.MinecraftServer.w(SourceFile:688) ~[server-1.18.1.jar:?]
    at net.minecraft.server.MinecraftServer.a(SourceFile:270) ~[server-1.18.1.jar:?]
    at java.lang.Thread.run(Thread.java:833) [?:?]

Someone else came on later and did the same thing, but banning them within a few seconds seems to have kept the server responsive and a restart unnecessary, with only a couple users disconnecting prior to the ban kicking the perpetrator. The server then crashed some time later

[20:08:27] [User Authenticator #21/INFO]: UUID of player SongNai is 504f2c20-18cf-4d06-aa38-c990231941d0
[20:08:27] [Server thread/INFO]: SongNai[/RedactedLocalHost:51496] logged in with entity id 91553 at (REDACTED, REDACTED, REDACTED)
[20:08:27] [Server thread/INFO]: SongNai joined the game
[20:08:32] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: Cannot read field "b" because "this.y" is null
	at aea.a(SourceFile:427) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:24) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:6) ~[server-1.18.1.jar:?]
	at qt.a(SourceFile:21) ~[server-1.18.1.jar:?]
	at yx.run(SourceFile:18) ~[server-1.18.1.jar:?]
	at auh.c(SourceFile:151) ~[server-1.18.1.jar:?]
	at aul.c(SourceFile:23) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.b(SourceFile:780) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.c(SourceFile:162) ~[server-1.18.1.jar:?]
	at auh.y(SourceFile:125) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.bf(SourceFile:762) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.y(SourceFile:756) ~[server-1.18.1.jar:?]
	at auh.c(SourceFile:134) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.x(SourceFile:741) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.w(SourceFile:688) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.a(SourceFile:270) ~[server-1.18.1.jar:?]
	at java.lang.Thread.run(Thread.java:833) [?:?]
[20:08:33] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: Cannot read field "b" because "this.y" is null
	at aea.a(SourceFile:427) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:24) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:6) ~[server-1.18.1.jar:?]
	at qt.a(SourceFile:21) ~[server-1.18.1.jar:?]
	at yx.run(SourceFile:18) ~[server-1.18.1.jar:?]
	at auh.c(SourceFile:151) ~[server-1.18.1.jar:?]
	at aul.c(SourceFile:23) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.b(SourceFile:780) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.c(SourceFile:162) ~[server-1.18.1.jar:?]
	at auh.y(SourceFile:125) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.bf(SourceFile:762) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.y(SourceFile:756) ~[server-1.18.1.jar:?]
	at auh.bp(SourceFile:110) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.x(SourceFile:740) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.w(SourceFile:688) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.a(SourceFile:270) ~[server-1.18.1.jar:?]
	at java.lang.Thread.run(Thread.java:833) [?:?]
[20:08:33] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: Cannot read field "b" because "this.y" is null
	at aea.a(SourceFile:427) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:24) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:6) ~[server-1.18.1.jar:?]
	at qt.a(SourceFile:21) ~[server-1.18.1.jar:?]
	at yx.run(SourceFile:18) ~[server-1.18.1.jar:?]
	at auh.c(SourceFile:151) ~[server-1.18.1.jar:?]
	at aul.c(SourceFile:23) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.b(SourceFile:780) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.c(SourceFile:162) ~[server-1.18.1.jar:?]
	at auh.y(SourceFile:125) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.bf(SourceFile:762) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.y(SourceFile:756) ~[server-1.18.1.jar:?]
	at auh.bp(SourceFile:110) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.x(SourceFile:740) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.w(SourceFile:688) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.a(SourceFile:270) ~[server-1.18.1.jar:?]
	at java.lang.Thread.run(Thread.java:833) [?:?]
[20:08:33] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: Cannot read field "b" because "this.y" is null
	at aea.a(SourceFile:427) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:24) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:6) ~[server-1.18.1.jar:?]
	at qt.a(SourceFile:21) ~[server-1.18.1.jar:?]
	at yx.run(SourceFile:18) ~[server-1.18.1.jar:?]
	at auh.c(SourceFile:151) ~[server-1.18.1.jar:?]
	at aul.c(SourceFile:23) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.b(SourceFile:780) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.c(SourceFile:162) ~[server-1.18.1.jar:?]
	at auh.y(SourceFile:125) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.bf(SourceFile:762) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.y(SourceFile:756) ~[server-1.18.1.jar:?]
	at auh.bp(SourceFile:110) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.x(SourceFile:740) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.w(SourceFile:688) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.a(SourceFile:270) ~[server-1.18.1.jar:?]
	at java.lang.Thread.run(Thread.java:833) [?:?]
[20:08:34] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: Cannot read field "b" because "this.y" is null
	at aea.a(SourceFile:427) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:24) ~[server-1.18.1.jar:?]
	at uy.a(SourceFile:6) ~[server-1.18.1.jar:?]
	at qt.a(SourceFile:21) ~[server-1.18.1.jar:?]
	at yx.run(SourceFile:18) ~[server-1.18.1.jar:?]
	at auh.c(SourceFile:151) ~[server-1.18.1.jar:?]
	at aul.c(SourceFile:23) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.b(SourceFile:780) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.c(SourceFile:162) ~[server-1.18.1.jar:?]
	at auh.y(SourceFile:125) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.bf(SourceFile:762) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.y(SourceFile:756) ~[server-1.18.1.jar:?]
	at auh.bp(SourceFile:110) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.x(SourceFile:740) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.w(SourceFile:688) ~[server-1.18.1.jar:?]
	at net.minecraft.server.MinecraftServer.a(SourceFile:270) ~[server-1.18.1.jar:?]
	at java.lang.Thread.run(Thread.java:833) [?:?]
[20:08:37] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 2686ms or 53 ticks behind
[20:08:51] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: null
[20:09:03] [User Authenticator #22/INFO]: UUID of player ChapulinMart06 is 77337186-ea17-498a-aefb-5335d42e7513
[20:09:10] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: null
[20:09:12] [User Authenticator #23/INFO]: UUID of player ChapulinMart06 is 77337186-ea17-498a-aefb-5335d42e7513
[20:09:17] [Server thread/INFO]: Altus_Crefire lost connection: Disconnected
[20:09:17] [Server thread/INFO]: Altus_Crefire left the game
[20:09:17] [Server thread/INFO]: ChapulinMart06 lost connection: Disconnected
[20:09:17] [Server thread/INFO]: ChapulinMart06 left the game
[20:09:17] [Server thread/INFO]: com.mojang.authlib.GameProfile@6aee5090[id=77337186-ea17-498a-aefb-5335d42e7513,name=ChapulinMart06,properties={textures=[com.mojang.authlib.properties.Property@6a3c8586]},legacy=false] (/RedactedLocalHost:51612) lost connection: Disconnected
[20:09:17] [Server thread/INFO]: ChapulinMart06[/RedactedLocalHost:51650] logged in with entity id 92263 at (REDACTED, REDACTED, REDACTED)
[20:09:17] [Server thread/INFO]: ChapulinMart06 joined the game
[20:09:17] [Server thread/INFO]: Banned SongNai: Banned by an operator
[20:09:21] [User Authenticator #24/INFO]: UUID of player SongNai is 504f2c20-18cf-4d06-aa38-c990231941d0
[20:09:24] [User Authenticator #25/INFO]: UUID of player Altus_Crefire is 560502c6-8a73-4f55-8251-66187ef07657
[20:09:24] [Server thread/INFO]: SongNai lost connection: You are banned from this server
[20:09:24] [Server thread/INFO]: SongNai left the game
[20:09:24] [Server thread/INFO]: Disconnecting com.mojang.authlib.GameProfile@370c3a46[id=504f2c20-18cf-4d06-aa38-c990231941d0,name=SongNai,properties={textures=[com.mojang.authlib.properties.Property@387753df]},legacy=false] (/RedactedLocalHost:51690): You are banned from this server.
Reason: Banned by an operator
[20:09:24] [Server thread/INFO]: com.mojang.authlib.GameProfile@370c3a46[id=504f2c20-18cf-4d06-aa38-c990231941d0,name=SongNai,properties={textures=[com.mojang.authlib.properties.Property@387753df]},legacy=false] (/RedactedLocalHost:51690) lost connection: You are banned from this server.
Reason: Banned by an operator
[20:09:24] [Server thread/INFO]: Altus_Crefire[/RedactedLocalHost:51702] logged in with entity id 92272 at (REDACTED, REDACTED, REDACTED)
[20:09:24] [Server thread/INFO]: Altus_Crefire joined the game
[20:09:24] [Server thread/WARN]: ugliestdood moved too quickly! 3.0479168491247037,-9.0,-3.365626261850366
[20:09:24] [Server thread/WARN]: handleDisconnection() called twice
[20:09:31] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 39764ms or 795 ticks behind
[20:09:32] [Server thread/INFO]: <ChapulinMart06> lag or sum
[20:09:51] [Server thread/INFO]: [Server] the person that just left was doing the same thing as before
[20:09:56] [Server thread/INFO]: [Server] the other person from before
[20:10:04] [Server thread/INFO]: <ChapulinMart06> oh i see
[20:10:15] [Server thread/INFO]: <ChapulinMart06> they crash servers?
[20:10:20] [Server thread/INFO]: [Server] they're banned now
[20:10:31] [Server thread/INFO]: [Server] ell, we didn't crash, just a bunch of disconnects
[20:10:42] [Server thread/WARN]: Mismatch in destroy block pos: gh{x=REDACTED, y=REDACTED, z=-REDACTED} gh{x=REDACTED, y=REDACTED, z=REDACTED}
[20:10:42] [Server thread/WARN]: Mismatch in destroy block pos: gh{x=REDACTED, y=REDACTED, z=-REDACTED} gh{x=REDACTED, y=REDACTED, z=REDACTED}
[20:10:47] [Server thread/INFO]: <ChapulinMart06> So in that case, they aren't welcome
[20:12:30] [User Authenticator #26/INFO]: UUID of player LichiestKnight is ae6688b1-ba4e-4efc-9072-76bb1f70c522
[20:12:30] [Server thread/INFO]: LichiestKnight[/RedactedLocalHost:52870] logged in with entity id 94493 at (REDACTED, REDACTED, REDACTED)
[20:12:30] [Server thread/INFO]: LichiestKnight joined the game
[20:12:37] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 2329ms or 46 ticks behind
[20:12:50] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: null
[20:12:53] [User Authenticator #27/INFO]: UUID of player ChapulinMart06 is 77337186-ea17-498a-aefb-5335d42e7513
[20:12:57] [User Authenticator #28/INFO]: UUID of player ChapulinMart06 is 77337186-ea17-498a-aefb-5335d42e7513
[20:13:05] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: null
[20:13:22] [User Authenticator #29/INFO]: UUID of player ChapulinMart06 is 77337186-ea17-498a-aefb-5335d42e7513
[20:13:22] [Server thread/INFO]: ChapulinMart06 lost connection: Disconnected
[20:13:22] [Server thread/INFO]: ChapulinMart06 left the game
[20:13:22] [Server thread/INFO]: Altus_Crefire lost connection: Disconnected
[20:13:22] [Server thread/INFO]: Altus_Crefire left the game
[20:13:22] [Server thread/INFO]: com.mojang.authlib.GameProfile@11b2ce28[id=77337186-ea17-498a-aefb-5335d42e7513,name=ChapulinMart06,properties={textures=[com.mojang.authlib.properties.Property@60eb28af]},legacy=false] (/RedactedLocalHost:52944) lost connection: Disconnected
[20:13:22] [Server thread/INFO]: com.mojang.authlib.GameProfile@74c41a35[id=77337186-ea17-498a-aefb-5335d42e7513,name=ChapulinMart06,properties={textures=[com.mojang.authlib.properties.Property@34958e4b]},legacy=false] (/RedactedLocalHost:52962) lost connection: Disconnected
[20:13:22] [Server thread/INFO]: ChapulinMart06[/RedactedLocalHost:53038] logged in with entity id 94797 at (REDACTED, REDACTED, REDACTED)
[20:13:22] [Server thread/INFO]: ChapulinMart06 joined the game
[20:13:23] [Server thread/FATAL]: Error executing task on Server
java.lang.NullPointerException: null
[20:13:37] [Server Watchdog/FATAL]: A single server tick took 60.00 seconds (should be max 0.05)
[20:13:37] [Server Watchdog/FATAL]: Considering it to be crashed, server will forcibly shutdown.
[20:13:39] [Server Watchdog/ERROR]: This crash report has been saved to: /media/carl/minecraft/test/./crash-reports/crash-2022-02-06_20.13.39-server.txt

Fixed

Altus

[Mojang] slicedlime

2022-02-06, 10:01 PM

2022-05-25, 08:22 AM

2022-05-25, 08:22 AM

0

2

Plausible

Very Important

Crash

1.18.1

1.19 Pre-release 3