LOL
I went back though my log files and found one that was about 5GB and 38 M lines! (25Mb compressed)
If I remember correctly it hung during a crash that happened back in April when the world was loading and I let it go for about 30 minutes while getting food.
Crash started at about line 9000 @ 10:34 and I closed it @ 11:01
I think it was caused by: [Server thread/ERROR]: CHROMATICRAFT ERROR: Tried adding a particle mid-update
and from about then to line 2.29M (10:39) a mix of:
[java.lang.Throwable$WrappedPrintStream
rintln:748] ~~~~~~~~~~~~~
and
[Client thread/INFO]: CHROMATICRAFT: CME thrown updating particle type Reika.ChromatiCraft.Render.ParticleEngine$RenderKey@2cef8422!
Then the rest is the particle line.
I was wondering why the log folder was that size.