[MC-137353] Game runs out of memory while building datafixers

Workaround

Add -Xss320k or -Xmx2G to your JVM arguments.

Usually happens in 32 bit systems only

16:39:27	launcher	Preparing to launch minecraft client for 1.13.2-pre2
16:39:29	launcher	Checking installations.
16:39:29	launcher	Minecraft client 1.13.2-pre2 is ready to start.
16:39:29	launcher	Starting!
16:39:29	launcher	Using default game log configuration client-1.12.xml (outputs XML)
16:39:34	cft	Setting user: KairoMartins18
13:39:47	game	Exception in thread "Client thread" java.lang.OutOfMemoryError: unable to create new native thread
	at java.lang.Thread.start0(Native Method)
	at java.lang.Thread.start(Thread.java:714)
	at java.util.concurrent.CompletableFuture$ThreadPerTaskExecutor.execute(CompletableFuture.java:405)
	at java.util.concurrent.CompletableFuture.asyncRunStage(CompletableFuture.java:1632)
	at java.util.concurrent.CompletableFuture.runAsync(CompletableFuture.java:1850)
	at com.mojang.datafixers.DataFixerBuilder.build(DataFixerBuilder.java:70)
	at xz.b(SourceFile:140)
	at xz.<clinit>(SourceFile:135)
	at aev$a.a(SourceFile:445)
	at aev.a(SourceFile:131)
	at aev.<clinit>(SourceFile:137)
	at pf.c(SourceFile:470)
	at cft.<init>(SourceFile:370)
	at net.minecraft.client.main.Main.main(SourceFile:144)
  <log4j:Event logger="com.mojang.datafixers.DataFixerBuilder" timestamp="1539977987406" level="ERROR" thread="Thread-571">
    <log4j:Message><![CDATA[Unable to build datafixers]]></log4j:Message>
    <log4j:Throwable><![CDATA[java.util.concurrent.CompletionException: java.lang.BootstrapMethodError: call site initialization exception
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1621)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.BootstrapMethodError: call site initialization exception
	at java.lang.invoke.CallSite.makeSite(CallSite.java:341)
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:307)
	at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297)
	at aap.makeRule(SourceFile:31)
	at com.mojang.datafixers.DataFix.getRule(DataFix.java:97)
	at com.mojang.datafixers.DataFixerUpper.lambda$getRule$6(DataFixerUpper.java:136)
	at com.mojang.datafixers.DataFixerUpper$$Lambda$394/5578326.apply(Unknown Source)
	at java.util.Map.computeIfAbsent(Map.java:957)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMap.computeIfAbsent(Long2ObjectMap.java:606)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:530)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:295)
	at com.mojang.datafixers.DataFixerUpper.getRule(DataFixerUpper.java:131)
	at com.mojang.datafixers.DataFixerBuilder.lambda$build$1(DataFixerBuilder.java:72)
	at com.mojang.datafixers.DataFixerBuilder$$Lambda$382/2455707.run(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1618)
	... 1 more
Caused by: java.lang.OutOfMemoryError: Metaspace
]]></log4j:Throwable>
  </log4j:Event>
13:39:47	monitor	expected <
16:39:43	com.mojang.datafixers.DataFixerBuilder	Unable to build datafixers
java.util.concurrent.CompletionException: java.lang.BootstrapMethodError: call site initialization exception
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1621)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.BootstrapMethodError: call site initialization exception
	at java.lang.invoke.CallSite.makeSite(CallSite.java:341)
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:307)
	at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297)
	at aap.makeRule(SourceFile:31)
	at com.mojang.datafixers.DataFix.getRule(DataFix.java:97)
	at com.mojang.datafixers.DataFixerUpper.lambda$getRule$6(DataFixerUpper.java:136)
	at com.mojang.datafixers.DataFixerUpper$$Lambda$394/5578326.apply(Unknown Source)
	at java.util.Map.computeIfAbsent(Map.java:957)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMap.computeIfAbsent(Long2ObjectMap.java:606)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:530)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:295)
	at com.mojang.datafixers.DataFixerUpper.getRule(DataFixerUpper.java:131)
	at com.mojang.datafixers.DataFixerBuilder.lambda$build$1(DataFixerBuilder.java:72)
	at com.mojang.datafixers.DataFixerBuilder$$Lambda$382/2455707.run(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1618)
	... 1 more
Caused by: java.lang.OutOfMemoryError: Metaspace
	at sun.misc.Unsafe.defineAnonymousClass(Native Method)
	at java.lang.invoke.InnerClassLambdaMetafactory.spinInnerClass(InnerClassLambdaMetafactory.java:324)
	at java.lang.invoke.InnerClassLambdaMetafactory.buildCallSite(InnerClassLambdaMetafactory.java:194)
	at java.lang.invoke.LambdaMetafactory.metafactory(LambdaMetafactory.java:304)
	at java.lang.invoke.LambdaForm$DMH/31016500.invokeStatic_L6_L(LambdaForm$DMH)
	at java.lang.invoke.LambdaForm$BMH/24567020.reinvoke(LambdaForm$BMH)
	at java.lang.invoke.LambdaForm$MH/11902257.invoke_MT(LambdaForm$MH)
	at java.lang.invoke.CallSite.makeSite(CallSite.java:302)
	... 15 more
16:39:44	com.mojang.datafixers.DataFixerBuilder	Unable to build datafixers
java.util.concurrent.CompletionException: java.lang.BootstrapMethodError: call site initialization exception
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1621)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.BootstrapMethodError: call site initialization exception
	at java.lang.invoke.CallSite.makeSite(CallSite.java:341)
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:307)
	at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297)
	at aap.makeRule(SourceFile:31)
	at com.mojang.datafixers.DataFix.getRule(DataFix.java:97)
	at com.mojang.datafixers.DataFixerUpper.lambda$getRule$6(DataFixerUpper.java:136)
	at com.mojang.datafixers.DataFixerUpper$$Lambda$394/5578326.apply(Unknown Source)
	at java.util.Map.computeIfAbsent(Map.java:957)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMap.computeIfAbsent(Long2ObjectMap.java:606)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:530)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:295)
	at com.mojang.datafixers.DataFixerUpper.getRule(DataFixerUpper.java:131)
	at com.mojang.datafixers.DataFixerBuilder.lambda$build$1(DataFixerBuilder.java:72)
	at com.mojang.datafixers.DataFixerBuilder$$Lambda$382/2455707.run(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1618)
	... 1 more
Caused by: java.lang.OutOfMemoryError: Metaspace
	at sun.misc.Unsafe.defineAnonymousClass(Native Method)
	at java.lang.invoke.InnerClassLambdaMetafactory.spinInnerClass(InnerClassLambdaMetafactory.java:324)
	at java.lang.invoke.InnerClassLambdaMetafactory.buildCallSite(InnerClassLambdaMetafactory.java:194)
	at java.lang.invoke.LambdaMetafactory.metafactory(LambdaMetafactory.java:304)
	at java.lang.invoke.LambdaForm$DMH/31016500.invokeStatic_L6_L(LambdaForm$DMH)
	at java.lang.invoke.LambdaForm$BMH/24567020.reinvoke(LambdaForm$BMH)
	at java.lang.invoke.LambdaForm$MH/11902257.invoke_MT(LambdaForm$MH)
	at java.lang.invoke.CallSite.makeSite(CallSite.java:302)
	... 15 more
16:39:44	com.mojang.datafixers.DataFixerBuilder	Unable to build datafixers
java.util.concurrent.CompletionException: java.lang.BootstrapMethodError: call site initialization exception
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1621)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.BootstrapMethodError: call site initialization exception
	at java.lang.invoke.CallSite.makeSite(CallSite.java:341)
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:307)
	at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297)
	at aap.makeRule(SourceFile:31)
	at com.mojang.datafixers.DataFix.getRule(DataFix.java:97)
	at com.mojang.datafixers.DataFixerUpper.lambda$getRule$6(DataFixerUpper.java:136)
	at com.mojang.datafixers.DataFixerUpper$$Lambda$394/5578326.apply(Unknown Source)
	at java.util.Map.computeIfAbsent(Map.java:957)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMap.computeIfAbsent(Long2ObjectMap.java:606)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:530)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:295)
	at com.mojang.datafixers.DataFixerUpper.getRule(DataFixerUpper.java:131)
	at com.mojang.datafixers.DataFixerBuilder.lambda$build$1(DataFixerBuilder.java:72)
	at com.mojang.datafixers.DataFixerBuilder$$Lambda$382/2455707.run(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1618)
	... 1 more
Caused by: java.lang.OutOfMemoryError: Metaspace
	at sun.misc.Unsafe.defineAnonymousClass(Native Method)
	at java.lang.invoke.InnerClassLambdaMetafactory.spinInnerClass(InnerClassLambdaMetafactory.java:324)
	at java.lang.invoke.InnerClassLambdaMetafactory.buildCallSite(InnerClassLambdaMetafactory.java:194)
	at java.lang.invoke.LambdaMetafactory.metafactory(LambdaMetafactory.java:304)
	at java.lang.invoke.LambdaForm$DMH/31016500.invokeStatic_L6_L(LambdaForm$DMH)
	at java.lang.invoke.LambdaForm$BMH/24567020.reinvoke(LambdaForm$BMH)
	at java.lang.invoke.LambdaForm$MH/11902257.invoke_MT(LambdaForm$MH)
	at java.lang.invoke.CallSite.makeSite(CallSite.java:302)
	... 15 more
16:39:43	com.mojang.datafixers.DataFixerBuilder	Unable to build datafixers
java.util.concurrent.CompletionException: java.lang.BootstrapMethodError: call site initialization exception
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1621)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.BootstrapMethodError: call site initialization exception
	at java.lang.invoke.CallSite.makeSite(CallSite.java:341)
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:307)
	at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297)
	at aap.makeRule(SourceFile:31)
	at com.mojang.datafixers.DataFix.getRule(DataFix.java:97)
	at com.mojang.datafixers.DataFixerUpper.lambda$getRule$6(DataFixerUpper.java:136)
	at com.mojang.datafixers.DataFixerUpper$$Lambda$394/5578326.apply(Unknown Source)
	at java.util.Map.computeIfAbsent(Map.java:957)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMap.computeIfAbsent(Long2ObjectMap.java:606)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:530)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:295)
	at com.mojang.datafixers.DataFixerUpper.getRule(DataFixerUpper.java:131)
	at com.mojang.datafixers.DataFixerBuilder.lambda$build$1(DataFixerBuilder.java:72)
	at com.mojang.datafixers.DataFixerBuilder$$Lambda$382/2455707.run(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1618)
	... 1 more
Caused by: java.lang.OutOfMemoryError: Metaspace
	at sun.misc.Unsafe.defineAnonymousClass(Native Method)
	at java.lang.invoke.InnerClassLambdaMetafactory.spinInnerClass(InnerClassLambdaMetafactory.java:324)
	at java.lang.invoke.InnerClassLambdaMetafactory.buildCallSite(InnerClassLambdaMetafactory.java:194)
	at java.lang.invoke.LambdaMetafactory.metafactory(LambdaMetafactory.java:304)
	at java.lang.invoke.LambdaForm$DMH/31016500.invokeStatic_L6_L(LambdaForm$DMH)
	at java.lang.invoke.LambdaForm$BMH/24567020.reinvoke(LambdaForm$BMH)
	at java.lang.invoke.LambdaForm$MH/11902257.invoke_MT(LambdaForm$MH)
	at java.lang.invoke.CallSite.makeSite(CallSite.java:302)
	... 15 more
16:39:46	com.mojang.datafixers.DataFixerBuilder	Unable to build datafixers
java.util.concurrent.CompletionException: java.lang.BootstrapMethodError: call site initialization exception
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273)
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1621)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.BootstrapMethodError: call site initialization exception
	at java.lang.invoke.CallSite.makeSite(CallSite.java:341)
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:307)
	at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297)
	at aap.makeRule(SourceFile:31)
	at com.mojang.datafixers.DataFix.getRule(DataFix.java:97)
	at com.mojang.datafixers.DataFixerUpper.lambda$getRule$6(DataFixerUpper.java:136)
	at com.mojang.datafixers.DataFixerUpper$$Lambda$394/5578326.apply(Unknown Source)
	at java.util.Map.computeIfAbsent(Map.java:957)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMap.computeIfAbsent(Long2ObjectMap.java:606)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:530)
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:295)
	at com.mojang.datafixers.DataFixerUpper.getRule(DataFixerUpper.java:131)
	at com.mojang.datafixers.DataFixerBuilder.lambda$build$1(DataFixerBuilder.java:72)
	at com.mojang.datafixers.DataFixerBuilder$$Lambda$382/2455707.run(Unknown Source)
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1618)
	... 1 more
Caused by: java.lang.OutOfMemoryError: Metaspace

Linked issues

is duplicated by 43

MC-137590 Process crashed with exit code 1 Resolved

MC-175872 Exit code 1 Resolved

MC-137416 Minecraft crashes before it loads Resolved

MC-137435 Minecraft does not start in version 1.13.2 Resolved

MC-137436 An unexpected issue occurred after update to version 1.13 Resolved

38 more links

relates to 2

MC-138093 Intermittent Exit code -1073741819 while using 2 core cpus on 1.13.2 and above, runs fine on 1.13.1 Resolved

MC-137430 Crash: Unable to build datafixers Resolved

Attachments

Game Outpot.txt

Comments 57

[Mod] Asteraoth 2018-10-19T19:59:05Z

Are you using the official launcher from https://minecraft.net/en-us/download?

Kairo Martins 2018-10-20T00:30:25Z

Yes Official Laucher

David 2018-10-20T19:54:16Z

Same is happening here. Seems to be a 32-bit problem, as it looks like the error I got when 1.13 snapshots were being released.

[Mod] Neko 2018-10-20T19:56:46Z

Does this happen in 1.13.1?

David 2018-10-20T20:09:31Z

Issue fixed. I just added "-Xss320k" to the JVM Arguments and I was able to play it. Maybe the game was trying to use the 1M stack size by default?

47 more comments

Daniel PRO 2018-10-22T05:46:06Z

Yes, i think is OutOfMemoryError bug. is 32 bit problem. Please fix it.

harry s thompson 2018-10-22T13:38:02Z

Where abouts do I add the "-Xss320k" in the JVM arguments as mine has "-Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M" in allready

Daniel PRO 2018-10-22T13:49:32Z

Confirmed in 1.13.2.

Uriel Salischiker 2018-10-22T21:12:12Z

-Xmx2G also fixes it

David 2018-10-22T22:07:26Z

harry, erase everything in the JVM Arguments and then add -Xss320k

Kairo Martins 2018-10-23T15:52:15Z

the arguments none is working I'm already panicking already the argument -Xss320k worked first time when loading closed is no longer opened nen stable version being the other does not open

David 2018-10-23T21:53:10Z

They need to fix it as fast as possible, seems like it happens with every 32-bit users. I wonder why this is happening, its the same thing that happened in 1.13 snapshots.

Daniel PRO 2018-10-24T11:47:30Z

Confirmed for 18w43a.

Kairo Martins 2018-10-24T12:30:42Z

yes this affects versions 1.13.2 forward

Daniel PRO 2018-10-24T16:13:41Z

Affects for 18w43b.

Aarón 2018-10-24T18:28:59Z

The arguments didn't work. Confirmed for 1.13.2, 18w43a & 18w43b, hope this get fixed soon...

thkg00fy 2018-10-25T03:38:02Z

My ticket (MC-137634) got marked as duplicate, but I'm not st sure about it. None of the workarounds did work; and it's a 64bit server (running 64bit Java), so I don't think it's 32bit related...

Daniel PRO 2018-10-26T11:47:30Z

I keep didn't start at 18w43c, Confirmed for 18w43c.

Magne 2018-10-27T01:46:27Z

The JVM argument -Xss320k allowed the 13.2 update to load instead of instantly crash with an out of memory error (-Xmx2G didn't work). However, the lag is complete (fps 0) and the game freezes and unfreezes constantly and is unplayable. Now, I am warned that I cannot go back to 13.1 since the game's lagging was saved in 13.2. I did save my game before trying the workaround so I am back playing in 13.1.

Kairo Martins 2018-10-31T13:26:44Z

there was a small update on 1.13.2 because the argument -Xssx320 voted to work more remains unsustainable can not play

Daniel PRO 2018-10-31T15:58:45Z

stop for the outofmemoryerror in the didn't start, 32 bit. Confirmed for 18w44a

ABRACRAFT_FIRE 2018-11-01T00:03:20Z

I am from Venezuela, I no have the resource for a new Computer or memory 😞 I use 1 GB RAM for my Minecraft

Andrey 2018-11-01T10:31:29Z

Game not run in 1gb of RAM in 32 bit?

Ashley 2018-11-03T02:28:31Z

The "-Xmx2G" workaround does not work what so ever and "-Xss320k" JVM argument should not be counted as a workaround... The max fps I can get with Xss320k adds up to a Grand total of 10 and it chugs like a mf every other second. Is there anything else we could do to fix this besides buying a new computer or buying/installing more memory? It seems that Windows 7 (x32) users are being left in the dust as they physically cannot install more than 4 GB of RAM. How 1.13.2 differs so much from 1.13.1 is kinda beyond me but nothing to be done about it. Please help us enjoy your game... Sincerely, People-With-No-Money

Knobel Max 2018-11-03T11:10:09Z

The same for Windows Vista (x32) users!

Uriel Salischiker 2018-11-03T11:15:59Z

1.13.2 updates datafixerupper, which now uses more threads.
The OS runs out of native threads while running on a 32 bit system, thus triggering the Out of memory error

thkg00fy 2018-11-03T13:22:47Z

@Urielsalis: that's weird. In my case it's a 64bit server (See MC-137634). How many "more threads" are there??

Uriel Salischiker 2018-11-03T13:27:01Z

with only 2 cores? And there are thousands of more threads

thkg00fy 2018-11-03T13:29:59Z

Yeah... only 2 cores. That's what one gets when using a "cheap" vServer to save some money. 😉

Uriel Salischiker 2018-11-03T13:48:49Z

sounds like MC-138093 then

thkg00fy 2018-11-03T14:27:32Z

not really... it's still only a server, it has no graphics card and it runs Ubuntu Linux. However, all the components are a little out of date, since this VM host didn't upgrade in the last 5 years. :-/

Uriel Salischiker 2018-11-04T00:23:51Z

From @marcono1234

It is not documented, but `commonPool()` has available processors -1 (http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/478a4add975b/src/share/classes/java/util/concurrent/ForkJoinPool.java#l3435)

And https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html says
> All async methods without an explicit Executor argument are performed using the ForkJoinPool.commonPool() (unless it does not support a parallelism level of at least two, in which case, a new Thread is created to run each task)
And also https://bugs.openjdk.java.net/browse/JDK-8213114, so explicit usage of the `commonPool()` can cause use of thread per task as well

DataFixerUpper uses number of cores - 1, so in 2 core processors the parallelism ends up being 1, so a thread is created for each thread

This makes the OS run out of native threads while running in 32 bits(this bug), and cause a weird crash in 64 bit(MC-138093)

Daniel PRO 2018-11-07T15:06:58Z

Confirmed for 18w45a.

Daniel PRO 2018-11-15T14:24:24Z

Confirmed for 18w46a

Daniel PRO 2018-11-21T19:44:02Z

Confirmed for 18w47a.

Daniel PRO 2018-11-23T18:53:52Z

Confirmed for 18w47b. Fix this weekend?

[Mod] violine1101 2018-11-23T19:23:59Z

Don't get your hopes up. The developers don't work on weekends. Weekends are weekends, after all.

thkg00fy 2018-11-23T19:41:59Z

Yeah, you just took my words out of my brain, Violine!

Try keep in mind that this place is for BUG REPORTS and not for status requests. Keep calm and wait until it might get fixed. At least the bug is CONFIRMED .. and that might mean it is or will be worked on. 🙂

If I understand it correctly, the reason for the reported behaviour is already found. It's not limited to Windows or 32bit OS, since it can also affect a non-GUI 64bit Linux multiplayer server.

Another thing: yeah, not everybody can afford a new PC to play Minecraft, but sadly this is the way of all things. It's called evolution. :-/

Kairo Martins 2018-11-24T13:10:39Z

not all people have money to buy a new pc really if it is called undeveloped countries there is no money this is not your reality you must have conditions for a new pc think of people yes in fact the best way is to buy a powerful pc more not to our reality.

Kairo Martins 2018-11-24T15:25:22Z

the latest snapshots a and 1.13.2 will work on my pc and you?

Daniel PRO 2018-11-29T17:49:52Z

Confirmed for 18w48a.

Willard Miles Percival 2018-12-06T19:08:33Z

Confirmed for 18w49a.

Orestis 2018-12-12T15:44:08Z

Confirmed for 18w50a

J.L 2018-12-17T11:27:12Z

I have this laptop https://support.hp.com/us-en/document/c05987723 and this error is happening to me as well on 18w50a, apparently is caused by having a dual core CPU from what others on a similar thread have said, the reason is that the method MC is using to create the game threads uses the number of cores -1 which means that if you have a dual core CPU all the threads try to get shoved onto 1 core which doesn't really work obviously. 1.13 doesn't have this issue for me since I guess it doesn't use that method but everything over 1.13.1 does 🙂 So basically I guess everything after 1.13 requires a 4 core CPU at minimum, RIP my $300 I spent a couple of months ago I guess

J.L 2018-12-17T11:57:39Z

Actually, disregard that, I found what the problem was for me, I realized that I was using 32 bit Java and not 64 bit so I downloaded and installed the latest 64 bit Java (191f) and now i18w50a works 😃 Now I just need to get the newest version of forge for this version (if there is any yet) so I can use optifine to get slightly better FPS

Willard Miles Percival 2019-01-09T18:53:04Z

Confirmed for 19w02a

Willard Miles Percival 2019-01-16T17:07:39Z

And 19w03a too

Bob Idontknow 2019-01-17T07:50:55Z

A new Java update was released, from what I read it was a bug fix, after I installed it 1.13.2 is able to launch. I tried to launch 18w43s and 19w03a but was unable to do so ,

the following was when I tried to run 19w03a

Exception in thread "Client thread" java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Unknown Source)
at java.util.concurrent.CompletableFuture$ThreadPerTaskExecutor.execute(Unknown Source)
at java.util.concurrent.CompletableFuture.asyncRunStage(Unknown Source)
at java.util.concurrent.CompletableFuture.runAsync(Unknown Source)
at com.mojang.datafixers.DataFixerBuilder.build(DataFixerBuilder.java:70)
at zk.b(SourceFile:155)
at zk.<clinit>(SourceFile:150)
at ahg$a.a(SourceFile:493)
at ahg.a(SourceFile:135)
at ahg.<clinit>(SourceFile:141)
at axd.<clinit>(SourceFile:630)
at cnh.<clinit>(SourceFile:12)
at cnc.a(SourceFile:9)
at bqi.k(SourceFile:211)
at bhl.a_(SourceFile:523)
at bqi$a.<init>(SourceFile:394)
at bqi$a.<init>(SourceFile:382)
at bqi.c(SourceFile:66)
at bhm.<clinit>(SourceFile:711)
at fk.D(SourceFile:75)
at fk.a(SourceFile:109)
at java.util.LinkedHashMap$LinkedEntrySet.forEach(Unknown Source)
at fk.<clinit>(SourceFile:108)
at qf.b(SourceFile:484)
at cqe.<init>(SourceFile:381)
at net.minecraft.client.main.Main.main(SourceFile:154)

Willard Miles Percival 2019-01-21T04:49:42Z

19w03b and 19w03c the same.

Marcos Rocha de Souza 2019-01-25T16:30:35Z

19w04a and 19w04b affected too

Willard Miles Percival 2019-02-06T18:11:26Z

19w05a and 19w06a too

Daniel PRO 2019-02-14T11:33:55Z

19w07a this too!

Willard Miles Percival 2019-02-21T00:57:50Z

Let me add 19w08a

Willard Miles Percival 2019-04-09T12:56:48Z

Anyone here knows if it was really fixed? i stopped reporting the snapshots because i live in Venezuela and i have several internet problems and i cant join the 19w09a because i cant download it for that.

Willard Miles Percival 2019-04-09T13:26:00Z

Yes it did! 19w09a confirmed, idk the newest but it did!

The_Fancy_Squid 2019-06-04T17:15:55Z

I had this issue on my computer on minecraft 1.14 and 1.14.2 With a windows 7 32 bit, i dont believe -Xmx2G is possible, but when i used -Xss320k i got less than 1 fps. My solution was to add Xmx750M, and it runs just a smooth as it did before the issue occured.

[Mod] violine1101 2019-06-04T17:32:44Z

@unknown, please create a new ticket if the issue persists.