Custom MCPC+ Server Crashing

[Amaxter]

I run a custom modpack server on MCPC+. Recently, I've begun to notice it's been crashing periodically, not because of any player events, but periodically every two hours or so. Can anyone make sense of this error? Would be greatly appreciated.

>java(79659,0x11ddc0000) malloc: *** error for object 0x111ddaf1a0: pointer being freed was not allocated

*** set a breakpoint in malloc_error_break to debug

Abort trap: 6

logout

 

[Process completed]

[planetguy]

What mods are in the pack? Do clients crash with the same error playing on singleplayer?

[Amaxter]

Lots of mods, pack link below, clients don't crash, just get kicked. Error doesn't seem to show up on singleplayer.

http://www.technicpack.net/modpack/details/maxtech.171156

[planetguy]

The crash looks like an error inside the JVM, not in Java code like Minecraft or a mod. My one guess as to what it would be is some mod uses a weird native library that is crashing.

You could try a different MCPC+ build, but I doubt it would help much. You could try reinstalling Java or using the default JVM arguments, since it looks a bit like some debug argument passed to the JVM leads to a breakpoint being triggered.

[Amaxter]

The crash looks like an error inside the JVM, not in Java code like Minecraft or a mod. My one guess as to what it would be is some mod uses a weird native library that is crashing.

You could try a different MCPC+ build, but I doubt it would help much. You could try reinstalling Java or using the default JVM arguments, since it looks a bit like some debug argument passed to the JVM leads to a breakpoint being triggered.

Well I'm using Java 7 on a mac (which I know is not a good combo in general) and my we are running custom arguments, my startup script looks like this:

#!/bin/bash

cd "$(dirname "$0")"

ulimit -c unlimited

exec java -server -Xmx4G -Xms4G -XX:MaxPermSize=256m -XX:UseSSE=4 -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:+UseParNewGC -XX:+DisableExplicitGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=2 -XX:+AggressiveOpts -jar Spigot.jar 

[planetguy]

Would using the default garbage collection setup cause problems? The error mentions trying to free a pointer that isn't allocated, and that would be a GC bug. If I had to guess, it would be a result of concurrent garbage collection (switched on by +UseConcMarkSweepGC) interfering with object creation, so you might have better luck doing without it.

[Amaxter]

Would using the default garbage collection setup cause problems? The error mentions trying to free a pointer that isn't allocated, and that would be a GC bug. If I had to guess, it would be a result of concurrent garbage collection (switched on by +UseConcMarkSweepGC) interfering with object creation, so you might have better luck doing without it.

So remove the +UseConcMarkSweepGC argument?

[planetguy]

Yes, it's worth trying in my opinion.

[Amaxter]

Still happens:

>java(511,0x11d2cb000) malloc: *** error for object 0x11d2ba950: pointer being freed was not allocated

*** set a breakpoint in malloc_error_break to debug

Abort trap: 6

logout

 

[Process completed]

Should I try removing Java 7 and downgrading to 6 (Reason i haven't done it yet is because it's a pain in the ass on Mac)

[planetguy]

It might help.