'install-curseforge' command failed on startup

[starkriedesel]

Describe the problem

While trying to install the create astral modpack using AUTO_CURSEFORGE I am getting a 'install-curseforge error. I've tried using latest as well as 2025.4.0 and 2025.3.0 versions of itzg/minecraft-server. Some other modpacks such as all-the-mods-10 do seem to work.

This is a new server with no existing files and the error occurs after downloading what seems like all the mod files.

Container definition

I'm using this kube helm chart. Here's my values.yaml

minecraftServer:
  eula: "TRUE"
  type: "AUTO_CURSEFORGE"
  autoCurseForge:
    apiKey:
      key: "...snip..."
    slug: "create-astral"

Container logs

[mc-image-helper] 18:43:34.433 ERROR : 'install-curseforge' command failed. Version is 1.41.2
reactor.core.Exceptions$RetryExhaustedException: Retries exhausted: 5/5
        at reactor.core.Exceptions.retryExhausted(Exceptions.java:308)
        Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
        *__checkpoint ⇢ downloadLauncher
        *__checkpoint ⇢ downloadResolvedLauncher
Original Stack Trace:
                at reactor.core.Exceptions.retryExhausted(Exceptions.java:308)
                at reactor.util.retry.RetryBackoffSpec.lambda$static$0(RetryBackoffSpec.java:68)
                at reactor.util.retry.RetryBackoffSpec.lambda$null$4(RetryBackoffSpec.java:608)
                at reactor.core.publisher.FluxConcatMapNoPrefetch$FluxConcatMapNoPrefetchSubscriber.onNext(FluxConcatMapNoPrefetch.java:183)
                at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onNext(FluxContextWrite.java:107)
                at reactor.core.publisher.SinkManyEmitterProcessor.drain(SinkManyEmitterProcessor.java:476)
                at reactor.core.publisher.SinkManyEmitterProcessor.tryEmitNext(SinkManyEmitterProcessor.java:273)
                at reactor.core.publisher.SinkManySerialized.tryEmitNext(SinkManySerialized.java:100)
                at reactor.core.publisher.InternalManySink.emitNext(InternalManySink.java:27)
                at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.onError(FluxRetryWhen.java:194)
                at reactor.core.publisher.MonoSubscribeOn$SubscribeOnSubscriber.onError(MonoSubscribeOn.java:152)
                at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondError(MonoFlatMap.java:241)
                at reactor.core.publisher.MonoFlatMap$FlatMapInner.onError(MonoFlatMap.java:315)
                at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onError(FluxContextWrite.java:121)
                at reactor.core.publisher.FluxDoFinally$DoFinallySubscriber.onError(FluxDoFinally.java:119)
                at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onError(FluxDefaultIfEmpty.java:156)
                at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondError(MonoFlatMap.java:241)
                at reactor.core.publisher.MonoFlatMap$FlatMapInner.onError(MonoFlatMap.java:315)
                at reactor.core.publisher.MonoTakeLastOne$TakeLastOneSubscriber.onError(MonoTakeLastOne.java:134)
                at reactor.core.publisher.MonoFlatMapMany$FlatMapManyInner.onError(MonoFlatMapMany.java:256)
                at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onError(FluxContextWrite.java:121)
                at reactor.core.publisher.FluxDoFinally$DoFinallySubscriber.onError(FluxDoFinally.java:119)
                at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onError(FluxMapFuseable.java:340)
                at reactor.core.publisher.FluxHide$SuppressFuseableSubscriber.onError(FluxHide.java:142)
                at reactor.core.publisher.MonoSubscribeOn$SubscribeOnSubscriber.onError(MonoSubscribeOn.java:152)
                at reactor.core.publisher.MonoStreamCollector$StreamCollectorSubscriber.onError(MonoStreamCollector.java:149)
                at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222)
                at reactor.core.publisher.FluxFlatMap$FlatMapMain.checkTerminated(FluxFlatMap.java:846)
                at reactor.core.publisher.FluxFlatMap$FlatMapMain.drainLoop(FluxFlatMap.java:612)
                at reactor.core.publisher.FluxFlatMap$FlatMapMain.drain(FluxFlatMap.java:592)
                at reactor.core.publisher.FluxFlatMap$FlatMapMain.onError(FluxFlatMap.java:455)
                at reactor.core.publisher.FluxHandle$HandleSubscriber.onError(FluxHandle.java:213)
                at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onError(FluxMap.java:265)
                at reactor.netty.channel.FluxReceive.terminateReceiver(FluxReceive.java:478)
                at reactor.netty.channel.FluxReceive.drainReceiver(FluxReceive.java:273)
                at reactor.netty.channel.FluxReceive.onInboundError(FluxReceive.java:466)
                at reactor.netty.channel.ChannelOperations.onInboundError(ChannelOperations.java:526)
                at reactor.netty.http.client.HttpClientOperations.onInboundClose(HttpClientOperations.java:349)
                at reactor.netty.channel.ChannelOperationsHandler.channelInactive(ChannelOperationsHandler.java:73)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:303)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:281)
                at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:274)
                at io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:81)
                at io.netty.handler.timeout.IdleStateHandler.channelInactive(IdleStateHandler.java:280)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:303)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:281)
                at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:274)
                at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelInactive(CombinedChannelDuplexHandler.java:418)
                at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:412)
                at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:377)
                at io.netty.handler.codec.http.HttpClientCodec$Decoder.channelInactive(HttpClientCodec.java:410)
                at io.netty.channel.CombinedChannelDuplexHandler.channelInactive(CombinedChannelDuplexHandler.java:221)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:303)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:281)
                at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:274)
                at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:412)
                at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:377)
                at io.netty.handler.ssl.SslHandler.channelInactive(SslHandler.java:1192)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:303)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:281)
                at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:274)
                at io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1352)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:301)
                at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:281)
                at io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:850)
                at io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:811)
                at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
                at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
                at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
                at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:405)
                at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:998)
                at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
                at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
                at java.base/java.lang.Thread.run(Unknown Source)
        Suppressed: java.lang.Exception: #block terminated with an error
                at reactor.core.publisher.BlockingSingleSubscriber.blockingGet(BlockingSingleSubscriber.java:104)
                at reactor.core.publisher.Mono.block(Mono.java:1779)
                at me.itzg.helpers.fabric.FabricLauncherInstaller.installUsingVersions(FabricLauncherInstaller.java:71)
                at me.itzg.helpers.curseforge.CurseForgeInstaller.prepareFabric(CurseForgeInstaller.java:965)
                at me.itzg.helpers.curseforge.CurseForgeInstaller.prepareModLoader(CurseForgeInstaller.java:952)
                at me.itzg.helpers.curseforge.CurseForgeInstaller.processModpack(CurseForgeInstaller.java:582)
                at me.itzg.helpers.curseforge.CurseForgeInstaller.resolveModpackFileAndProcess(CurseForgeInstaller.java:395)
                at me.itzg.helpers.curseforge.CurseForgeInstaller.installByRetrievingModpackZip(CurseForgeInstaller.java:257)
                at me.itzg.helpers.curseforge.CurseForgeInstaller.lambda$install$3(CurseForgeInstaller.java:182)
                at me.itzg.helpers.curseforge.CurseForgeInstaller.install(CurseForgeInstaller.java:228)
                at me.itzg.helpers.curseforge.CurseForgeInstaller.install(CurseForgeInstaller.java:181)
                at me.itzg.helpers.curseforge.InstallCurseForgeCommand.call(InstallCurseForgeCommand.java:222)
                at me.itzg.helpers.curseforge.InstallCurseForgeCommand.call(InstallCurseForgeCommand.java:30)
                at picocli.CommandLine.executeUserObject(CommandLine.java:2045)
                at picocli.CommandLine.access$1500(CommandLine.java:148)
                at picocli.CommandLine$RunLast.executeUserObjectOfLastSubcommandWithSameParent(CommandLine.java:2465)
                at picocli.CommandLine$RunLast.handle(CommandLine.java:2457)
                at picocli.CommandLine$RunLast.handle(CommandLine.java:2419)
                at picocli.CommandLine$AbstractParseResultHandler.execute(CommandLine.java:2277)
                at picocli.CommandLine$RunLast.execute(CommandLine.java:2421)
                at picocli.CommandLine.execute(CommandLine.java:2174)
                at me.itzg.helpers.McImageHelper.main(McImageHelper.java:178)
Caused by: reactor.netty.http.client.PrematureCloseException: Connection prematurely closed DURING response
        Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
        *__checkpoint ⇢ Fetching file into directory
        *__checkpoint ⇢ Fetch HEAD of requested file
Original Stack Trace:
[init] [ERROR] Failed to auto-install CurseForge modpack

[itzg]

Seems to be a networking issue

Connection prematurely closed DURING response

Perhaps try it again later.

[lhvy]

I am having the same issue with using Modrinth modpack. I can reach the Modrinth site just fine on that machine via curl or ping.

[itzg]

Re-pull the latest image since I recently reverted a change that seemed to be causing similar networking symptoms.

[lhvy]

Do I need to use latest or is stable ok? I can check again later tonight, but I'm reasonably confident I had pulled the latest stable image just before testing and making that comment.

[itzg]

Either one includes the change I was thinking. Talking with other users this might be somehow an issue on Fabric's servers. Not sure yet what the pattern is though.

[starkriedesel]

After a couple days it did work for me. It seems Fabric's servers may have some intermittent instability.

[github-actions]

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