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AE2 system freeze, UnknownFormatConversion error in logs #3911

Ricket opened this issue Jan 21, 2019 · 0 comments

AE2 system freeze, UnknownFormatConversion error in logs #3911

Ricket opened this issue Jan 21, 2019 · 0 comments


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@Ricket Ricket commented Jan 21, 2019

Describe the bug
Suddenly can't withdraw or deposit items from my AE2 system. Other AE2 systems in the server working fine.

To Reproduce
Not sure. I have storage drawers with a storage bus. Been playing for many hours without hitting this error so it seems to be a rare case.

Expected behavior
system should work fine

Additional context
This error showed up in the server logs around the time that my system became non functional:

[19:20:00] [Server thread/FATAL] [minecraft/MinecraftServer]: Error executing task
java.util.concurrent.ExecutionException: java.util.UnknownFormatConversionException: Conversion = '1'
        at ~[?:1.8.0_191]
        at java.util.concurrent.FutureTask.get( ~[?:1.8.0_191]
        at net.minecraft.util.Util.func_181617_a(SourceFile:47) [h.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q( [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q( [nz.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p( [MinecraftServer.class:?]
        at [MinecraftServer.class:?]
        at [?:1.8.0_191]
Caused by: java.util.UnknownFormatConversionException: Conversion = '1'
        at java.util.Formatter.checkText( ~[?:1.8.0_191]
        at java.util.Formatter.parse( ~[?:1.8.0_191]
        at java.util.Formatter.format( ~[?:1.8.0_191]
        at java.util.Formatter.format( ~[?:1.8.0_191]
        at java.lang.String.format( ~[?:1.8.0_191]
        at appeng.core.AELog.log( ~[AELog.class:?]
        at appeng.core.AELog.warn( ~[AELog.class:?]
        at ~[ItemHandlerAdapter.class:?]
        at ~[ItemHandlerAdapter.class:?]
        at ~[MEPassThrough.class:?]
        at ~[MEInventoryHandler.class:?]
        at ~[NetworkInventoryHandler.class:?]
        at ~[NetworkMonitor.class:?]
        at appeng.util.Platform.poweredExtraction( ~[Platform.class:?]
        at appeng.util.Platform.poweredExtraction( ~[Platform.class:?]
        at appeng.container.AEBaseContainer.doAction( ~[AEBaseContainer.class:?]
        at appeng.core.sync.packets.PacketInventoryAction.serverPacketData( ~[PacketInventoryAction.class:?]
        at$ ~[AppEngServerPacketHandler$1.class:?]
        at appeng.core.sync.AppEngPacket.func_148833_a( ~[AppEngPacket.class:?]
        at$ ~[hv$1.class:?]
        at java.util.concurrent.Executors$ ~[?:1.8.0_191]
        at ~[?:1.8.0_191]
        at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?]
        ... 5 more

It looks like this warning line is bad, should probably have %s or %d instead of %1, according that exception text.


  • Minecraft Version: 1.12.2
  • AE2 Version: appliedenergistics2-rv6-stable-6.jar
  • Forge Version:
@yueh yueh closed this in 8a4c9b5 Apr 21, 2019
@github-actions github-actions bot locked as resolved and limited conversation to collaborators Apr 21, 2020
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