none

This is still happening.

Hi,

Thanks for the quick reply. This can be closed as resolved.

crash log for vanilla attached

THIS IS VANILLA!!

This is vanilla!

I can try without fabric

I was able to duplicate this issue in single player mode:

seed: 6025187801934259743

teleport to x=-6149.68, y=62.07, z=-5970.01 and load some scenery, like the very large mountain.  

[00:10:22] [Render thread/INFO]: [CHAT] Seed: [6025187801934259743][00:10:22] [Render thread/INFO]: [CHAT] Seed: [6025187801934259743][00:10:29] [Server thread/INFO]: Saving and pausing game...[00:10:29] [Server thread/INFO]: Saving chunks for level 'ServerLevel[testseed]'/minecraft:overworld[00:10:31] [Server thread/INFO]: Saving chunks for level 'ServerLevel[testseed]'/minecraft:the_nether[00:10:31] [Server thread/INFO]: Saving chunks for level 'ServerLevel[testseed]'/minecraft:the_end[00:10:31] [Server thread/WARN]: Can't keep up! Is the server overloaded? Running 2523ms or 50 ticks behind[00:10:32] [Server thread/INFO]: Saving and pausing game...[00:10:32] [Server thread/INFO]: Saving chunks for level 'ServerLevel[testseed]'/minecraft:overworld[00:10:32] [Server thread/INFO]: Saving chunks for level 'ServerLevel[testseed]'/minecraft:the_nether[00:10:32] [Server thread/INFO]: Saving chunks for level 'ServerLevel[testseed]'/minecraft:the_end[00:11:32] [Server thread/INFO]: [wxczxc: Teleported wxczxc to -6148.500000, 62.000000, -5969.500000][00:11:32] [Render thread/INFO]: [CHAT] Teleported wxczxc to -6148.500000, 62.000000, -5969.500000[00:11:34] [Render thread/INFO]: Loaded 7 advancements[00:11:57] [Server thread/INFO]: [wxczxc: Set own game mode to Creative Mode][00:11:57] [Render thread/INFO]: [CHAT] Set own game mode to Creative Mode[00:12:02] [Worker-Main-5/WARN]: Worker-Main-5 diedjava.util.concurrent.CompletionException: z: Feature placement at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314) ~[?:?] at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319) ~[?:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1155) ~[?:?] at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) ~[?:?] at abl.b(SourceFile:58) ~[21w37a.jar:?] at ask.g(SourceFile:91) ~[21w37a.jar:?] at ask.a(SourceFile:146) ~[21w37a.jar:?] at ask.run(SourceFile:102) ~[21w37a.jar:?] at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1434) ~[?:?] at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295) ~[?:?] at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) ~[?:?] at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) ~[?:?] at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) ~[?:?] at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) [?:?]Caused by: z: Feature placement at abj.a(SourceFile:637) ~[21w37a.jar:?] at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] at abj.a(SourceFile:619) ~[21w37a.jar:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) ~[?:?] ... 11 moreCaused by: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0 at jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) ~[?:?] at jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) ~[?:?] at jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) ~[?:?] at java.util.Objects.checkIndex(Objects.java:359) ~[?:?] at java.util.ArrayList.get(ArrayList.java:427) ~[?:?] at czb.a(SourceFile:52) ~[21w37a.jar:?] at czb.a(SourceFile:47) ~[21w37a.jar:?] at cyz.a(SourceFile:68) ~[21w37a.jar:?] at cti.b(SourceFile:33) ~[21w37a.jar:?] at cti.b(SourceFile:11) ~[21w37a.jar:?] at cso.a(SourceFile:24) ~[21w37a.jar:?] at ctb.a(SourceFile:63) ~[21w37a.jar:?] at cth.a(SourceFile:38) ~[21w37a.jar:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?] at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?] at cth.a(SourceFile:29) ~[21w37a.jar:?] at ctb.a(SourceFile:63) ~[21w37a.jar:?] at cth.a(SourceFile:38) ~[21w37a.jar:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?] at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?] at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) ~[?:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?] at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?] at cth.a(SourceFile:29) ~[21w37a.jar:?] at ctb.a(SourceFile:63) ~[21w37a.jar:?] at cth.a(SourceFile:38) ~[21w37a.jar:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?] at java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180) ~[?:?] at java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104) ~[?:?] at java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:699) ~[?:?] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?] at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?] at cth.a(SourceFile:29) ~[21w37a.jar:?] at ctb.a(SourceFile:63) ~[21w37a.jar:?] at cob.a(SourceFile:288) ~[21w37a.jar:?] at cod.c(SourceFile:115) ~[21w37a.jar:?] at cod.a(SourceFile:256) ~[21w37a.jar:?] at abj.a(SourceFile:625) ~[21w37a.jar:?] at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] at abj.a(SourceFile:619) ~[21w37a.jar:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) ~[?:?] ... 11 more[00:12:02] [Worker-Main-9/WARN]: Worker-Main-9 diedjava.util.concurrent.CompletionException: z: Feature placement at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314) ~[?:?] at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319) ~[?:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1155) ~[?:?] at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) ~[?:?] at abl.b(SourceFile:58) ~[21w37a.jar:?] at ask.g(SourceFile:91) ~[21w37a.jar:?] at ask.a(SourceFile:146) ~[21w37a.jar:?] at ask.run(SourceFile:102) ~[21w37a.jar:?] at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1434) ~[?:?] at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295) ~[?:?] at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) ~[?:?] at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) ~[?:?] at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) ~[?:?] at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) [?:?]Caused by: z: Feature placement at abj.a(SourceFile:637) ~[21w37a.jar:?] at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] at abj.a(SourceFile:619) ~[21w37a.jar:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) ~[?:?] ... 11 moreCaused by: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0 at jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) ~[?:?] at jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) ~[?:?] at jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) ~[?:?] at java.util.Objects.checkIndex(Objects.java:359) ~[?:?] at java.util.ArrayList.get(ArrayList.java:427) ~[?:?] at czb.a(SourceFile:52) ~[21w37a.jar:?] at czb.a(SourceFile:47) ~[21w37a.jar:?] at cyz.a(SourceFile:68) ~[21w37a.jar:?] at cti.b(SourceFile:33) ~[21w37a.jar:?] at cti.b(SourceFile:11) ~[21w37a.jar:?] at cso.a(SourceFile:24) ~[21w37a.jar:?] at ctb.a(SourceFile:63) ~[21w37a.jar:?] at cth.a(SourceFile:38) ~[21w37a.jar:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?] at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?] at cth.a(SourceFile:29) ~[21w37a.jar:?] at ctb.a(SourceFile:63) ~[21w37a.jar:?] at cth.a(SourceFile:38) ~[21w37a.jar:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?] at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?] at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) ~[?:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?] at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?] at cth.a(SourceFile:29) ~[21w37a.jar:?] at ctb.a(SourceFile:63) ~[21w37a.jar:?] at cth.a(SourceFile:38) ~[21w37a.jar:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?] at java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180) ~[?:?] at java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104) ~[?:?] at java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:699) ~[?:?] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?] at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?] at cth.a(SourceFile:29) ~[21w37a.jar:?] at ctb.a(SourceFile:63) ~[21w37a.jar:?] at cob.a(SourceFile:288) ~[21w37a.jar:?] at cod.c(SourceFile:115) ~[21w37a.jar:?] at cod.a(SourceFile:256) ~[21w37a.jar:?] at abj.a(SourceFile:625) ~[21w37a.jar:?] at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?] at abj.a(SourceFile:619) ~[21w37a.jar:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) ~[?:?] ... 11 more

This is from this morning.  In both known cases, the player was in a boat:

[10:46:40] [Server thread/ERROR]: Encountered an unexpected exception[10:46:40] [Server thread/ERROR]: Encountered an unexpected exceptionjava.util.concurrent.CompletionException: z: Feature placement at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314) ~[?:?] at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319) ~[?:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1155) ~[?:?] at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) ~[?:?] at abl.b(SourceFile:58) ~[server.jar:?] at ask.g(SourceFile:91) ~[server.jar:?] at ask.a(SourceFile:146) ~[server.jar:?] at ask.run(SourceFile:102) ~[server.jar:?] at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1434) ~[?:?] at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295) ~[?:?] at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) ~[?:?] at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) ~[?:?] at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) ~[?:?] at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[?:?]Caused by: z: Feature placement at abj.a(SourceFile:637) ~[server.jar:?] at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[server.jar:?] at abj.a(SourceFile:619) ~[server.jar:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) ~[?:?] ... 11 moreCaused by: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0 at jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) ~[?:?] at jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) ~[?:?] at jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) ~[?:?] at java.util.Objects.checkIndex(Objects.java:359) ~[?:?] at java.util.ArrayList.get(ArrayList.java:427) ~[?:?] at czb.a(SourceFile:52) ~[server.jar:?] at czb.a(SourceFile:47) ~[server.jar:?] at cyz.a(SourceFile:68) ~[server.jar:?] at cti.b(SourceFile:33) ~[server.jar:?] at cti.b(SourceFile:11) ~[server.jar:?] at cso.a(SourceFile:24) ~[server.jar:?] at ctb.a(SourceFile:63) ~[server.jar:?] at cth.a(SourceFile:38) ~[server.jar:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?] at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?] at cth.a(SourceFile:29) ~[server.jar:?] at ctb.a(SourceFile:63) ~[server.jar:?] at cth.a(SourceFile:38) ~[server.jar:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?] at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?] at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) ~[?:?] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?] at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?] at cth.a(SourceFile:29) ~[server.jar:?] at ctb.a(SourceFile:63) ~[server.jar:?] at cth.a(SourceFile:38) ~[server.jar:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?] at java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180) ~[?:?] at java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104) ~[?:?] at java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:699) ~[?:?] at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?] at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?] at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?] at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?] at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?] at cth.a(SourceFile:29) ~[server.jar:?] at ctb.a(SourceFile:63) ~[server.jar:?] at cob.a(SourceFile:288) ~[server.jar:?] at cod.c(SourceFile:115) ~[server.jar:?] at cod.a(SourceFile:256) ~[server.jar:?] at abj.a(SourceFile:625) ~[server.jar:?] at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[server.jar:?] at abj.a(SourceFile:619) ~[server.jar:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) ~[?:?] ... 11 more[10:46:40] [Server thread/ERROR]: This crash report has been saved to: /home ...

This is on rejoin:

---- Minecraft Crash Report -------- Minecraft Crash Report ----// Ouch. That hurt :(
Time: 9/20/21, 11:24 AMDescription: Feature placement
java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0 at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) at java.base/java.util.Objects.checkIndex(Objects.java:359) at java.base/java.util.ArrayList.get(ArrayList.java:427) at czb.a(SourceFile:52) at czb.a(SourceFile:47) at cyz.a(SourceFile:68) at cti.b(SourceFile:33) at cti.b(SourceFile:11) at cso.a(SourceFile:24) at ctb.a(SourceFile:63) at cth.a(SourceFile:38) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at cth.a(SourceFile:29) at ctb.a(SourceFile:63) at cth.a(SourceFile:38) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at cth.a(SourceFile:29) at ctb.a(SourceFile:63) at cth.a(SourceFile:38) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180) at java.base/java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104) at java.base/java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:699) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at cth.a(SourceFile:29) at ctb.a(SourceFile:63) at cob.a(SourceFile:288) at cod.c(SourceFile:115) at cod.a(SourceFile:256) at abj.a(SourceFile:625) at com.mojang.datafixers.util.Either$Left.map(Either.java:38) at abj.a(SourceFile:619) at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) at abl.b(SourceFile:58) at ask.g(SourceFile:91) at ask.a(SourceFile:146) at ask.run(SourceFile:102) at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1434) at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295) at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
-- Head --Thread: Server threadStacktrace: at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) at java.base/java.util.Objects.checkIndex(Objects.java:359) at java.base/java.util.ArrayList.get(ArrayList.java:427) at czb.a(SourceFile:52) at czb.a(SourceFile:47) at cyz.a(SourceFile:68) at cti.b(SourceFile:33) at cti.b(SourceFile:11) at cso.a(SourceFile:24) at ctb.a(SourceFile:63) at cth.a(SourceFile:38) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at cth.a(SourceFile:29) at ctb.a(SourceFile:63) at cth.a(SourceFile:38) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276) at java.base/java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at cth.a(SourceFile:29) at ctb.a(SourceFile:63) at cth.a(SourceFile:38) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.IntPipeline$1$1.accept(IntPipeline.java:180) at java.base/java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104) at java.base/java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:699) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at cth.a(SourceFile:29) at ctb.a(SourceFile:63)
-- Feature --Details: Description: ResourceKey[minecraft:worldgen/configured_feature / minecraft:flower_meadow]
-- Generation --Details: CenterX: -394 CenterZ: -384 Seed: 5250215393181259519Stacktrace: at cob.a(SourceFile:288) at cod.c(SourceFile:115) at cod.a(SourceFile:256)
-- Chunk to be generated --Details: Location: -394,-384 Position hash: -1644972474762 Generator: crh@1c354109Stacktrace: at abj.a(SourceFile:625) at com.mojang.datafixers.util.Either$Left.map(Either.java:38) at abj.a(SourceFile:619) at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) at abl.b(SourceFile:58) at ask.g(SourceFile:91) at ask.a(SourceFile:146) at ask.run(SourceFile:102)
-- Affected level --Details: All players: 1 total; [abx['namemoved'/113, l='ServerLevel[edited]', x=-6149.68, y=62.07, z=-5970.01]] Chunk stats: 3702 Level dimension: minecraft:overworld Level spawn location: World: (16,109,128), Section: (at 0,13,0 in 1,6,8; chunk contains blocks 16,-64,128 to 31,319,143), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,-64,0 to 511,319,511) Level time: 7515327 game time, 8609254 day time Level name: iirc Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false Level weather: Rain time: 26393 (now: false), thunder time: 135943 (now: false) Known server brands: vanilla Level was modded: false Level storage version: 0x04ABD - AnvilStacktrace: at net.minecraft.server.MinecraftServer.b(SourceFile:896) at aax.b(SourceFile:335) at net.minecraft.server.MinecraftServer.a(SourceFile:833) at net.minecraft.server.MinecraftServer.x(SourceFile:690) at net.minecraft.server.MinecraftServer.a(SourceFile:274) at java.base/java.lang.Thread.run(Thread.java:831)
-- System Details --Details: Minecraft Version: 21w37a Minecraft Version ID: 21w37a Operating System: Linux (amd64) version 4.18.0-305.19.1.el8_4.x86_64 Java Version: 16.0.1, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode, sharing), Oracle Corporation Memory: 1763692352 bytes (1681 MiB) / 10737418240 bytes (10240 MiB) up to 10737418240 bytes (10240 MiB) CPUs: 4 Processor Vendor: AuthenticAMD Processor Name: AMD Ryzen 7 3700X 8-Core Processor Identifier: AuthenticAMD Family 23 Model 113 Stepping 0 Microarchitecture: Zen 2 Frequency (GHz): -0.00 Number of physical packages: 1 Number of physical CPUs: 4 Number of logical CPUs: 4 Graphics card #0 name: Device Graphics card #0 vendor: Vendor (0x1234) Graphics card #0 VRAM (MB): 16.00 Graphics card #0 deviceId: 0x1111 Graphics card #0 versionInfo: unknown Virtual memory max (MB): 18212.11 Virtual memory used (MB): 17900.21 Swap memory total (MB): 6064.00 Swap memory used (MB): 0.25 JVM Flags: 11 total; -Xms10G -Xmx10G -XX:+UseG1GC -XX:+UnlockExperimentalVMOptions -XX:MaxGCPauseMillis=100 -XX:+DisableExplicitGC -XX:TargetSurvivorRatio=90 -XX:G1NewSizePercent=50 -XX:G1MaxNewSizePercent=80 -XX:G1MixedGCLiveThresholdPercent=50 -XX:+AlwaysPreTouch Player Count: 1 / 7; [abx['lkmsdfsdf'/113, l='ServerLevel[sdfsdfsdf]', x=-6149.68, y=62.07, z=-5970.01]] Data Packs: vanilla Is Modded: Unknown (can't tell) Type: Dedicated Server (map_server.txt)

This IS still an issue in 1.17 and is also a duplication exploit mechanism.

[12:58:17] [Netty Epoll Server IO #1/ERROR]: io.netty.handler.codec.EncoderException: java.io.UTFDataFormatException: encoded string (\{"text":...ࠝࠝࠝ"}) too long: 65546 bytes [12:58:17] [Server thread/INFO]: Player lost connection: Internal Exception: io.netty.handler.codec.EncoderException: java.io.UTFDataFormatException: encoded string (\{"text":...ࠝࠝࠝ"}) too long: 65546 bytes

Same! my rainbow beacon made my map unplayable!

Actually it's the one of PE. Win10 1.1.3

it works too on 1.9.2 and 1.9.3 snapshots

and in the trend update it works perfectly

it stills affects

it also affects to 1.9.1 pre 1