When you ride a mob and kill it, the entire server crashes, and this last time it happened I had to reboot the entire server the crash was so bad.

No errors occur though, or if they do they don't show up. I know it is MobRider because it ONLY happens when someone rides a mob and kills it.

Did you try the dev build I linked to in your other bug report? You will need that for bukkit 1.1-R1. You can find it here: http://ci.milkbowl.net/view/mung3r/job/MobRider/

That is the one I downloaded and used.

The log should show this version if you are using the dev build:

11:47:31 [INFO] [MobRider] 0.44-b26 enabled.

Did you remove the old MobRider.jar before installing the dev build? Note that the dev build is named MobRider-0.0.1-SNAPSHOT.jar when you download it. Check that you don't have two of them installed.

Oh sorry, was looking at the wrong part of the log. This is the version I am actually using:

2012-01-20 19:07:53 [INFO] [MobRider] 0.44-b25 enabled.

I wasn't able to recreate this bug in these scenarios:

1. Riding a mob and kill said mob myself
2. Riding a mob and another player kill my ride

Do either of these scenarios match? Also, what version of bukkit and MobRider you are using? The version info can be fetched from the server.log.

I need more information in order to take this any further.

This server is running Craftbukkit version git-Bukkit-1.0.1-R1-76-gbd52691-b1770jnks (MC: 1.1) (Implementing API version 1.1-R1-SNAPSHOT)

2012-01-20 15:58:46 [INFO] [MobRider] 0.44 enabled.

java version "1.6.0_17"
OpenJDK Runtime Environment (IcedTea6 1.7.9) (rhel-1.36.b17.el6_0-x86_64)
OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)

Plugins: WorldEdit, mcbans, WhoMode, SimpleHat, PermissionsEx, SimpleCarts, OpenInv, WELog, ChatManager, OWHPoweredNetherack, Questioner, LagMeter, Vault, SignColours, Vanilla, Deadbolt, TreasureHunt, pvparena, LogOres, iConomy, BlocksOnGlass, LogBlockQuestioner, Superpickaxe, MobDisguise, WorldGuard, Essentials, NoCheat, NoLagg, Permissions, EssentialsSpawn, Register, DeathControl, LogBlock, ChestShop, Towny, TownyChat, Jobs, dynmap, mcMMO, Citizens

CentOS 6 (x64) with Xeon E3-1230 Quad Core CPU and 8GB RAM.

I was on a Creeper, and killed it with a Bow and Arrow when everything crashed. The most recent crash, I cannot figure out who killed it, or what they did yet, but I know for a fact that when I killed the creeper I crashed the server.

I just rode a creeper, killed it and my server survived. At this point, my best guess is that there is an incompatibility with another plugin in the mix.

I would setup a local test server and add MobRider first, then add the rest of the plugins a few at a time to isolate which combination is causing the crash.

I get the feeling that mob Disguise is Part of the issue, I know it throws errors if you mount a player in it, or mount someone who is disguised.

Would it be possible to make it so you can't kill whatever you are riding just as a temporary work around?

I downloaded all of the plugin and tried it on my local server, no crash. Im clueless as to what it could be.

Did you also fetch the plugin configurations? I'm thinking that may be important in trying to duplicate the crash on your local test server.

Yes, I mirrored my server exactly, and nothing happened. Im quite baffled.

This is fixed in the latest build. Working fine now.

Not sure what changed, but it works :)

Yay!

Well, java is now

java version "1.6.0_22"
OpenJDK Runtime Environment (IcedTea6 1.10.4) (rhel-1.42.1.10.4.el6_2-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)

Who knows what was going on, just glad it is fixed!