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Re: Corrupt chunk, again

Posted: Mon Sep 13, 2010 7:07 pm
by rbos
I didn't find it, but I rolled back about 15 minutes. Hopefully the chunk was generated in the intervening time.

Re: Corrupt chunk, again

Posted: Tue Sep 14, 2010 11:07 am
by rbos
It looks like the bad chunks are gone, for now.

There'll probably be more coming down the pike, but with backups every 8 hours, we should be okay.

I've gotten pretty good at finding them.

Step 1: Fire up the world, note who logs in, wait for it to crash.
Step 2: Download all the user dat files from world/players to the local machine.
Step 3: Get the current xpos/zpos of all those users.
Step 4: Run the world on an alternate port.
Step 5: Set /home to the first user's location, /reload, /home.
Step 6: Repeat 5) for all users until it crashes. Then you know the approximate location.
Step 7a) If I want to be lazy, roll that coordinate+/- 100 back to the most recent backup.
Step 7b) If I'm industrious, start sectioning off that coordinate, rolling back different areas to narrow down which chunk it is. This is difficult and takes a long time.

Re: Corrupt chunk, again

Posted: Wed Sep 15, 2010 2:15 pm
by Tiel424
rbos wrote:It looks like the bad chunks are gone, for now.

There'll probably be more coming down the pike, but with backups every 8 hours, we should be okay.

I've gotten pretty good at finding them.

Step 1: Fire up the world, note who logs in, wait for it to crash.
Step 2: Download all the user dat files from world/players to the local machine.
Step 3: Get the current xpos/zpos of all those users.
Step 4: Run the world on an alternate port.
Step 5: Set /home to the first user's location, /reload, /home.
Step 6: Repeat 5) for all users until it crashes. Then you know the approximate location.
Step 7a) If I want to be lazy, roll that coordinate+/- 100 back to the most recent backup.
Step 7b) If I'm industrious, start sectioning off that coordinate, rolling back different areas to narrow down which chunk it is. This is difficult and takes a long time.
That's what she sai-
Never mind...

Anywho really hope that chunk is..um...deleted? Or is it "fixed"? -__-

Re: Corrupt chunk, again

Posted: Wed Sep 15, 2010 7:49 pm
by rbos
Yep, fixed it a couple of days ago.

A couple of other server admins think that minecarts and rails cause bad chunks, so I've disabled that, hopefully it prevents future crashes.

Re: Corrupt chunk, again

Posted: Wed Sep 15, 2010 8:41 pm
by Spire
Yeah I've seen some weird issues with minecarts lately, not to mention that they are unusable anyway. Definitely keep them disabled for now.