Solved Direwolf20 1.5.2 Server keeps `Crashing`

[J3FF97]

Hello Everyone.

So i recently updated my server from the private pack version of dw20 1.5.2 to the `Official` version, and since then the server sometimes just completely shuts itself off.
It happens randomly, and without warning, not even a lag spike or something you (Or it's just me, who knows) `Normally` get before a crash.

I am running the server from my own computer, I have 4 gigs ram dedicated to it, 3.5 to the server, 512M to Permgen.
Using the recommended version of dw20 1.5.2.
It is a small server, with currently a max of 3 players, 2 on my network, the other somewhere else.
Running Windows 7 64bit, 8GB RAM.

One of the weird things is: NOTHING shows up in the logs, client side the only message is "Server Closed" and server side the only thing you can see is " stopping the server' etc, the standard things you would see when you would issue the "Stop" command.

Logs will be posted by request, but I have gone over them countless times, and i see nothing that could cause crashing.

Thanks in advance.
J3FF97

EDIT: Going through my logs from yesterday [ 11-8-2013] I have found 1 log where the upper described case is present, my 2 other logs have clear crashes in them, unfortunatly I myself get lost when reading logs, so again, if anyone needs to see them, please tell me, and i'll pastebin them and share them with you!

 

[Dingham]

Pastebin the crash from the logs and I'll happily look.

Also whats your start up command? Might highlight something.

 

[J3FF97]

My logs were too big to upload to pastebin, okay :/ So I just uploaded them here in this post, hope you dont mind ^^
the first log (server-0) describes the problem of the server just shutting off out of the blue
The other 2 logs show a crash, i think it is a Permgen crash, not sure.

java -Xms3G -Xmx3G -XX:PermSize=256M -XX:MaxPermSize=512M -jar ftbserver.jar

This is what I use as my startup Command, I used this one since last year, and whenever i need to update i just copy over the command and change the name of the .jar if necessary.

 

[Dingham]

2013-08-11 19:35:38 [INFO] [STDERR] Caused by: java.lang.OutOfMemoryError: PermGen space
2013-08-11 19:35:38 [INFO] [STDERR]     at java.lang.ClassLoader.defineClass1(Native Method)
2013-08-11 19:35:38 [INFO] [STDERR]     at java.lang.ClassLoader.defineClass(Unknown Source)
2013-08-11 19:35:38 [INFO] [STDERR]     at java.security.SecureClassLoader.defineClass(Unknown Source)
2013-08-11 19:35:38 [INFO] [STDERR]     at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:227)
2013-08-11 19:35:40 [INFO] [STDERR]     ... 8 more
2013-08-11 19:35:41 [INFO] [Minecraft-Server] Stopping server

There's your problem

 

[cjm721]

The 0 log that is odd. Nothing really to go off of. But as for the others it is a permgen issue which does not make sense with you having dedicated 512M (unless garage collector is not running correctly).

There are a few startup scripts floating around. You might want to go to the mystcraft wiki (BinaryMage) and use that startup script as it is designed for memory management.

 

[Dingham]

Maybe its to do with the way you have minimum/maximum set up. Try ...

java -Xms3G -Xmx3G -XX:PermSize=512M -jar ftbserver.jar

 

[J3FF97]

I thought it was something like that, and when taking a closer look I found out I had a lot of junk running all the time, so here is what i did:
I ran my cleaner, did a defrag, deinstalled some stuff, the basic things, I also reduced the amount of background programs running to only the bare minimum
I also allocated +/- 10 GB virtual memory on my hard disc, just for that extra space, then I turned on the server, had it running all day long, no crashes, 2 players on almost all the time.
The issue was ( in my case) Memory usage by junk programs, or at least thats the problem, If I still get crashes like this ill look up other startscripts like you said, but for now it is fixed, thanks for taking a look at the problem.