Issue Description:

The XP Obelisk doesn't work when putting xp into it in multiplayer. It only does it in survival.

What happens:

Nothing

What you expected to happen:

It drains the XP from the player and puts it in the obelisk

Steps to reproduce:

1. Install EnderIO on a server
2. Place an XP Obelisk
3. Try to put XP into it in survival

Affected Versions (Do not use "latest"):

• EnderIO: 5.2.66
• EnderCore: 0.5.76
• Minecraft: 1.12.2
• Forge: 14.23.5.2854
• SpongeForge? no
• Optifine? yes
• Single Player and/or Server? Server

Your most recent log file where the issue was present:

Snippet from the server i'm playing on
Snippet from a test server with only EnderIO

same problem

@HenryLoenwind will the next release be for 1.12.2?

When is the new version of the mod including this fix going to be released?

Hello, have the same problem.
How do I fix this ?
Im playing on Infinity Evolved Reloaded :)

Error executing task
java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_261]
at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_261]
at net.minecraft.util.Util.func_181617_a(SourceFile:47) [h.class:?]
at org.spongepowered.common.SpongeImplHooks.onUtilRunTask(SpongeImplHooks.java:310) [SpongeImplHooks.class:1.12.2-2838-7.3.0]
at net.minecraft.server.MinecraftServer.redirect$zjg000$onRun(MinecraftServer.java:4682) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:723) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_261]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
at crazypants.enderio.machines.machine.obelisk.xp.ContainerExperienceObelisk.doDrainXP(ContainerExperienceObelisk.java:66) ~[ContainerExperienceObelisk.class:?]
at crazypants.enderio.machines.machine.obelisk.xp.ContainerExperienceObeliskProxy$doDrainXP.lambda$apply$1(ContainerExperienceObeliskProxy$doDrainXP.java:38) ~[ContainerExperienceObeliskProxy$doDrainXP.class:?]
at crazypants.enderio.base.network.ExecPacket$Handler.onMessage(ExecPacket.java:78) ~[ExecPacket$Handler.class:?]
at crazypants.enderio.base.network.ExecPacket$Handler.onMessage(ExecPacket.java:73) ~[ExecPacket$Handler.class:?]
at com.enderio.core.common.network.ThreadedNetworkWrapper$Wrapper$Runner.run(ThreadedNetworkWrapper.java:119) ~[ThreadedNetworkWrapper$Wrapper$Runner.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_261]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_261]
at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?]
... 7 more
[08:27:13] [Server thread/FATAL] [minecraft/MinecraftServer]: Error executing task
java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_261]
at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_261]
at net.minecraft.util.Util.func_181617_a(SourceFile:47) [h.class:?]
at org.spongepowered.common.SpongeImplHooks.onUtilRunTask(SpongeImplHooks.java:310) [SpongeImplHooks.class:1.12.2-2838-7.3.0]
at net.minecraft.server.MinecraftServer.redirect$zjg000$onRun(MinecraftServer.java:4682) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:723) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_261]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
at crazypants.enderio.machines.machine.obelisk.xp.ContainerExperienceObelisk.doDrainXP(ContainerExperienceObelisk.java:66) ~[ContainerExperienceObelisk.class:?]
at crazypants.enderio.machines.machine.obelisk.xp.ContainerExperienceObeliskProxy$doDrainXP.lambda$apply$1(ContainerExperienceObeliskProxy$doDrainXP.java:38) ~[ContainerExperienceObeliskProxy$doDrainXP.class:?]
at crazypants.enderio.base.network.ExecPacket$Handler.onMessage(ExecPacket.java:78) ~[ExecPacket$Handler.class:?]
at crazypants.enderio.base.network.ExecPacket$Handler.onMessage(ExecPacket.java:73) ~[ExecPacket$Handler.class:?]
at com.enderio.core.common.network.ThreadedNetworkWrapper$Wrapper$Runner.run(ThreadedNetworkWrapper.java:119) ~[ThreadedNetworkWrapper$Wrapper$Runner.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_261]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_261]
at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?]
... 7 more
[08:27:14] [Server thread/FATAL] [minecraft/MinecraftServer]: Error executing task
java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_261]
at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_261]
at net.minecraft.util.Util.func_181617_a(SourceFile:47) [h.class:?]
at org.spongepowered.common.SpongeImplHooks.onUtilRunTask(SpongeImplHooks.java:310) [SpongeImplHooks.class:1.12.2-2838-7.3.0]
at net.minecraft.server.MinecraftServer.redirect$zjg000$onRun(MinecraftServer.java:4682) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:723) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_261]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
at crazypants.enderio.machines.machine.obelisk.xp.ContainerExperienceObelisk.doDrainXP(ContainerExperienceObelisk.java:66) ~[ContainerExperienceObelisk.class:?]
at crazypants.enderio.machines.machine.obelisk.xp.ContainerExperienceObeliskProxy$doDrainXP.lambda$apply$1(ContainerExperienceObeliskProxy$doDrainXP.java:38) ~[ContainerExperienceObeliskProxy$doDrainXP.class:?]
at crazypants.enderio.base.network.ExecPacket$Handler.onMessage(ExecPacket.java:78) ~[ExecPacket$Handler.class:?]
at crazypants.enderio.base.network.ExecPacket$Handler.onMessage(ExecPacket.java:73) ~[ExecPacket$Handler.class:?]
at com.enderio.core.common.network.ThreadedNetworkWrapper$Wrapper$Runner.run(ThreadedNetworkWrapper.java:119) ~[ThreadedNetworkWrapper$Wrapper$Runner.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_261]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_261]
at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?]
... 7 more

Same issue

I can also confirm this, reproducible with just enderio (latest) on survival, tested on a server, the only thing that happens is that the server throws an exception every time you press the button on the gui, no xp gets transferred, here's mine:

java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_191]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?: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.java:723) [MinecraftServer.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_191]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
	at crazypants.enderio.machines.machine.obelisk.xp.ContainerExperienceObelisk.doDrainXP(ContainerExperienceObelisk.java:66) ~[ContainerExperienceObelisk.class:?]
	at crazypants.enderio.machines.machine.obelisk.xp.ContainerExperienceObeliskProxy$doDrainXP.lambda$apply$1(ContainerExperienceObeliskProxy$doDrainXP.java:38) ~[ContainerExperienceObeliskProxy$doDrainXP.class:?]
	at crazypants.enderio.base.network.ExecPacket$Handler.onMessage(ExecPacket.java:78) ~[ExecPacket$Handler.class:?]
	at crazypants.enderio.base.network.ExecPacket$Handler.onMessage(ExecPacket.java:73) ~[ExecPacket$Handler.class:?]
	at com.enderio.core.common.network.ThreadedNetworkWrapper$Wrapper$Runner.run(ThreadedNetworkWrapper.java:119) ~[ThreadedNetworkWrapper$Wrapper$Runner.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_191]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_191]
	at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?]
	... 5 more```

Same problem

I just use the rod on a portable tank so i could put the liquid in the fluid transposer

same issue

As a workaround you can Shift+RMB the obelisk with an Experience Rod, it will put all your XP into the obelisk.

same issue