[egbertjan]

Recently I've started getting random server crashes on multiple servers.
I don't really get much information in the console when the server crashes only the following:

---- Host_Changelevel ----
SoundEmitter:  removing map sound overrides [5172 to remove, 1354 to restore]

qhull precision error: Only 4 facets remain.  Can not merge another
pair.  The convexity constraints may be too strong.  Reduce the
magnitude of 'Cn' or increase the magnitude of 'An'.  For example,
try 'C-0.001' instead of 'C-0.1' or 'A-0.999' instead of 'A-0.9'.

qhull precision error: Only 4 facets remain.  Can not merge another
pair.  The convexity constraints may be too strong.  Reduce the
magnitude of 'Cn' or increase the magnitude of 'An'.  For example,
try 'C-0.001' instead of 'C-0.1' or 'A-0.999' instead of 'A-0.9'.
ConVarRef room_type doesn't point to an existing ConVar
Executing dedicated server config file server.cfg
Item Whitelist file 'item_whitelist.txt' could not be found. All items will be allowed.
Set motd from file 'cfg/motd_default.txt'.  ('cfg/motd.txt' was not found.)
Set motd_text from file 'cfg/motd_text_default.txt'.  ('cfg/motd_text.txt' was not found.)

I'm using the latest snapshots of metamod and sourcemod.


Please help me out, I'm getting annoyed to keep restarting my servers when they get stuck (they don't restart by themselves because it's not a full crash).

[Potato Uno]

Install Accelerator to get the full stack trace (assuming it reports anything). I don't know if that will be helpful, but you can try installing that and see if it prints anything.

On another note: Are you running a custom map? If it's a particular map causing the problem, then it's a map error, not a server error.

[egbertjan]

I have installed the accelerator on one of my servers. Lets see if this will report anything.
Also I am only running maps made by valve for MvM. Nothing custom.

[Potato Uno]

I'm also running MvM servers (both Valve and custom maps), and I never encountered that error before. I'd say your next bet is to disable sourcemod and metamod; it might be some weird plugin or extension causing it. (Do you use stripper by some chance?)

[egbertjan]

It has only been happening recently. Maybe it's an update from valve?
Also I haven't been using the stripper plugin.

[Potato Uno]

We just did mvm_hillside_v7 (workshop map) and mvm_sewer_invasion_event_b7, with the latest SM and MM snapshots installed, and the server is working perfectly fine. I'm running my server on windows 7. If you're on linux then it's possible that it's a bug on the linux build that Valve introduced. Run your server completely vanilla and try again.

You can also try the brute force approach and download a totally new server from steamcmd and run that, and see if the problem persists. (If it does persist, then it's a confirmed Valve bug. Otherwise it's something on your end.)

[Phaiz]

Originally Posted by egbertjan Recently I've started getting random server crashes on multiple servers. I don't really get much information in the console when the server crashes only the following: ---- Host_Changelevel ---- SoundEmitter: removing map sound overrides [5172 to remove, 1354 to restore] qhull precision error: Only 4 facets remain. Can not merge another pair. The convexity constraints may be too strong. Reduce the magnitude of 'Cn' or increase the magnitude of 'An'. For example, try 'C-0.001' instead of 'C-0.1' or 'A-0.999' instead of 'A-0.9'. qhull precision error: Only 4 facets remain. Can not merge another pair. The convexity constraints may be too strong. Reduce the magnitude of 'Cn' or increase the magnitude of 'An'. For example, try 'C-0.001' instead of 'C-0.1' or 'A-0.999' instead of 'A-0.9'. ConVarRef room_type doesn't point to an existing ConVar Executing dedicated server config file server.cfg Item Whitelist file 'item_whitelist.txt' could not be found. All items will be allowed. Set motd from file 'cfg/motd_default.txt'. ('cfg/motd.txt' was not found.) Set motd_text from file 'cfg/motd_text_default.txt'. ('cfg/motd_text.txt' was not found.) I'm using the latest snapshots of metamod and sourcemod. Please help me out, I'm getting annoyed to keep restarting my servers when they get stuck (they don't restart by themselves because it's not a full crash).

Those 'qhull precision' errors are map errors and (afaik) will have nothing to do with SM/MM. I only know this because I've seen it before with maps I've made for TF2. Are you certain that you aren't running some custom mvm maps? If you are, then the map likely has too much physics. The map maker could have used too many power 4 displacements, or there could be some really weird geometry going on with a displacement somewhere (it may even be outside of the visible map). I'm fairly certain that buggy vertexes can cause problems as well

[egbertjan]

I'm running on Linux 14.04 LTS. My mapcycle contains the following maps:

mvm_decoy
mvm_bigrock
mvm_coaltown
mvm_ghost_town
mvm_mannhattan
mvm_mannworks
mvm_rottenburg

Maybe because of the new updates of SM / MM something is glitching a bit. Since last night there haven't been many servers crashing, but just one. I will use the accelerator plugin to monitor and place data in here in case I will get useful information from them.

Thanks for the help and suggestions so far! Appreciated.

[Potato Uno]

Out of curiosity, how long does it work before the server just randomly shits the bed? (or in other words, it causes that hang up?)

It is possible that the server isn't properly cleaning up itself on map change. I would just do a mandatory 24 hour server restart every day just for that only, assuming that it only hangs up after a couple of days.

As a last resort, run the cache integrity check (app_update 232250 validate) on the server and see if it downloads anything. I'm really out of ideas at this point, especially since I'm not facing these issues.

Here are the stuff I'm running on my server as a point of reference. In particular, compare the SM, MM, and TF2Items versions to yours.

Sourcemod:

PHP Code:

 SourceMod Version Information:
    SourceMod Version: 1.7.3-dev+5216
    SourcePawn Engine: SourcePawn 1.7, jit-x86 (build 1.7.3-dev+5216)
    SourcePawn API: v1 = 4, v2 = 6
    Compiled on: Jun 26 2015 08:13:45
    Built from: https://github.com/alliedmodders/sourcemod/commit/4296245
    Build ID: 5216:4296245
    http://www.sourcemod.net/ 


Metamod:

PHP Code:

Metamod:Source version 1.10.6-dev
Built from: https://github.com/alliedmodders/metamod-source/commit/e14b479
Build ID: 940:e14b479
Loaded As: Valve Server Plugin
Compiled on: May 10 2015
Plugin interface version: 15:14
SourceHook version: 5:5
http://www.metamodsource.net/ 


Metamod extensions:

PHP Code:

Listing 6 plugins:
  [01] SourceMod (1.7.3-dev+5216) by AlliedModders LLC
  [02] Stripper (1.2.2) by BAILOPAN
  [03] TF2Items (1.6.2) by Asherkin & AzuiSleet & Damizean
  [04] TF2 Tools (1.7.3-dev+5216) by AlliedModders LLC
  [05] SDK Hooks (1.7.3-dev+5216) by AlliedModders LLC
  [06] SDK Tools (1.7.3-dev+5216) by AlliedModders LLC 


Sourcemod Plugins (not important, but in case you want to see them, here you go):

PHP Code:

[SM] Listing 25 plugins:
  01 "Admin File Reader" (1.7.3-dev+5216) by AlliedModders LLC
  02 "AdminCheats" (0.2) by devicenull
  03 "Admin Help" (1.7.3-dev+5216) by AlliedModders LLC
  04 "Admin Menu" (1.7.3-dev+5216) by AlliedModders LLC
  05 "Anti-Flood" (1.7.3-dev+5216) by AlliedModders LLC
  06 "Basic Ban Commands" (1.7.3-dev+5216) by AlliedModders LLC
  07 "Basic Chat" (1.7.3-dev+5216) by AlliedModders LLC
  08 "Basic Comm Control" (1.7.3-dev+5216) by AlliedModders LLC
  09 "Basic Commands" (1.7.3-dev+5216) by AlliedModders LLC
  10 "Basic Info Triggers" (1.7.3-dev+5216) by AlliedModders LLC
  11 "Basic Votes" (1.7.3-dev+5216) by AlliedModders LLC
  12 "Client Preferences" (1.7.3-dev+5216) by AlliedModders LLC
  13 "entitytest.smx"
  14 "Fun Commands" (1.7.3-dev+5216) by AlliedModders LLC
  15 "MvM Administration Tools" by Hydrogen/Potato Uno
  16 "MvM Natives" by Potato Uno (Hydrogen)
  17 "Nextmap" (1.7.3-dev+5216) by AlliedModders LLC
  18 "Player Commands" (1.7.3-dev+5216) by AlliedModders LLC
  19 "Reserved Slots" (1.7.3-dev+5216) by AlliedModders LLC
  20 "Observer Point" (1.0.100) by <eVa>Dog
  21 "Sound Commands" (1.7.3-dev+5216) by AlliedModders LLC
  22 "test.smx"
  23 "[TF2] TF2Attributes" (1.2.1) by FlaminSarge
  24 "[TF2] Taunt 'em" (1.0.0.3) by FlaminSarge edited by Xven
  25 "Themes" (0.8) by J-Factor 


[Phaiz]

You should really do daily restarts regardless of if problems exist or not. Maps start to get glitchy, especially the walls, after about 20 hours