Found UUID x but player already has a UUID x. Not replacing UUID in usermap.

[antibitcoin]

Type of bug

Error in console

/ess version output

I know you would ask if server is online or offline mode, the server is offline mode because I am using waterfall, the waterfall it self is online mode, and I am using Bungeeguard and ip tables to prevent non premium players from joining my back end, so there is no way these users could have double UUIDS, the only thing I can think of is NPCs "Citizens 2" because for a fact when someone donates they get an NPC that looks like them to show on spawn, but well most of the users showing this error when they login never donated.
I am confused but tying to give leads.

Error log (if applicable)

No response

Bug description

[16:39:11 INFO]: [Essentials] Found UUID f51219be-6192-4bbe-a849-55a063b71643 for player vietnamfortnite, but player already has a UUID (a5e7bf09-bf65-4ced-8a30-1069756ba265). Not replacing UUID in usermap.
java.lang.RuntimeException: null
at com.earth2me.essentials.UserMap.trackUUID(UserMap.java:141) ~[?:?]
at com.earth2me.essentials.UserMap.load(UserMap.java:168) ~[?:?]
at com.earth2me.essentials.UserMap.load(UserMap.java:30) ~[?:?]
at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3716) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2424) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2298) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2211) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache.get(LocalCache.java:4154) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4158) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5147) ~[patched_1.17.1.jar:git-Paper-96]
at com.earth2me.essentials.UserMap.getUser(UserMap.java:118) ~[?:?]
at com.earth2me.essentials.BalanceTopImpl.calculateBalanceTopMap(BalanceTopImpl.java:32) ~[?:?]
at org.bukkit.craftbukkit.v1_17_R1.scheduler.CraftTask.run(CraftTask.java:100) ~[patched_1.17.1.jar:git-Paper-96]
at org.bukkit.craftbukkit.v1_17_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) ~[patched_1.17.1.jar:git-Paper-96]
at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[patched_1.17.1.jar:git-Paper-96]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[?:?]
at java.lang.Thread.run(Thread.java:831) [?:?]

Steps to reproduce

When user logs in this keeps showing on console spamming.

Expected behaviour

Expected not to show errors on console

Actual behaviour

[16:39:11 INFO]: [Essentials] Found UUID f51219be-6192-4bbe-a849-55a063b71643 for player vietnamfortnite, but player already has a UUID (a5e7bf09-bf65-4ced-8a30-1069756ba265). Not replacing UUID in usermap.
java.lang.RuntimeException: null
at com.earth2me.essentials.UserMap.trackUUID(UserMap.java:141) ~[?:?]
at com.earth2me.essentials.UserMap.load(UserMap.java:168) ~[?:?]
at com.earth2me.essentials.UserMap.load(UserMap.java:30) ~[?:?]
at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3716) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2424) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2298) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2211) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache.get(LocalCache.java:4154) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4158) ~[patched_1.17.1.jar:git-Paper-96]
at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5147) ~[patched_1.17.1.jar:git-Paper-96]
at com.earth2me.essentials.UserMap.getUser(UserMap.java:118) ~[?:?]
at com.earth2me.essentials.BalanceTopImpl.calculateBalanceTopMap(BalanceTopImpl.java:32) ~[?:?]
at org.bukkit.craftbukkit.v1_17_R1.scheduler.CraftTask.run(CraftTask.java:100) ~[patched_1.17.1.jar:git-Paper-96]
at org.bukkit.craftbukkit.v1_17_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) ~[patched_1.17.1.jar:git-Paper-96]
at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[patched_1.17.1.jar:git-Paper-96]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[?:?]
at java.lang.Thread.run(Thread.java:831) [?:?]

[mdcfe]

Your usermap is polluted with incorrect UUIDs. Could you try stopping your server, renaming plugins/Essentials/usermap.csv to usermap.csv.bak, and starting your server back up?

[antibitcoin]

I have done that, the issue is still there, done it before posting here as I found this solution on another similiar issue about poisned uuids.
didn't fix my problem, which is so wierd. it just generates a new file, than from the first boot up the issue start again.

[antibitcoin]

Your usermap is polluted with incorrect UUIDs. Could you try stopping your server, renaming plugins/Essentials/usermap.csv to usermap.csv.bak, and starting your server back up?

Any other solution or tool to fix the pollution.

[Builder45]

@antibitcoin I had the same issue. I just deleted all the userfiles in question. (The files matching the second UUID mentioned in the error message) and then at the end deleting usermap entirely. None of the usernames sounded familiar, so I didn't have any worries in deleting their data.

Not sure if there is any other way to fix it, but this was just my own solution :)

[RanMinecraft]

This problem is happening to me when I am starting the server.

[TheNety]

This happens to me also, after updating to 1.17.1 together with latest EssX dev build

[antibitcoin]

@antibitcoin I had the same issue. I just deleted all the userfiles in question. (The files matching the second UUID mentioned in the error message) and then at the end deleting usermap entirely. None of the usernames sounded familiar, so I didn't have any worries in deleting their data.

Not sure if there is any other way to fix it, but this was just my own solution :)

I have also tried that with no use, it keeps coming back, I still think it might be citizens or something like that.
or maybe the new minecraeft minecrosoft auth system, not sure if that out yet tho.

[Chew]

or maybe the new [Minecraft] [Microsoft] auth system,

This wouldn't affect UUIDs nor usernames.

[antibitcoin]

it happens less frequent, mostly only during startup of the server, than sometimes when people logging in.

[Aira-Sakuranomiya]

Same problem here

[niqofdez]

Same here

[Chew]

Yes, we understand it's an issue...

Please at least try what was mentioned here: #4342 (comment)