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[1.7.10] Random crash error


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I ran into this sporadic random crash error forge 1291:




---- Minecraft Crash Report ----

// I bet Cylons wouldn't have this problem.


Time: 14/02/15 2.42

Description: Exception in server tick loop



at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922)

at java.util.HashMap$KeyIterator.next(HashMap.java:956)

at net.minecraft.entity.EntityTracker.updateTrackedEntities(EntityTracker.java:274)

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:715)

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:614)

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:485)

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:752)




any idea?

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look this:



The JRE System library is Java 8 Update 31, I can launch forge with my mods perfectly fine. Unless somehow, somewhere I do have java 7 on my system (Which I shouldn't because I delete the folders whenever I install an update) Then it does work with java 8.


Edit: Which eclipse are you using? I use eclipse luna which may be why, but no idea.

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Are you messing with the Entity Tracker on client side code?


This error means that the server thread is trying to access an EntityTracker object which another thread has just modified.  Probably it was you...


These errors can be a real pain to track down.  You might be able to get some clues if you put a breakpoint on ConcurrentModificationException with Pause All Threads, then see what the other threads are doing / have just done when the breakpoint triggers.





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