Weird MP bug

[barbolani 198]

Hello friends!

 

On Antistasi Tanoa I am receiving several reports on which happens the following:

 

- AI freezes totally.

- AI becomes inmune.

- Players can't login again.

- Irreproducible: Happens sometimes after hours playing.

 

And .rpt was clean clean as Bohemian glass....

 

My first thought is some script error is flooding the server and collapsing it, but first, something should be shown in .rpt, and second, CPU load stats etc. should show something, and those reports include an almost idle CPU.

 

I checked all scripts (I have a TON) related to allowDamage, handleDamage, disableAI etc.. nothing wrong and of course nothing which by accident can be applied to allUnits whatever.

 

So I beg you gurus your opinion on where to debug-check, or if there is something known engine Bug related to this which I don't know.

 

In SP all goes well.

 

Thanks in advance!!!!

 

 

[davidoss 550]

- AI freezes totally.

- AI becomes inmune.

 

This behavior is similar to "non owner" ai

The same happens when AI controlled by HC and HC is disconnected and the AIs are not assigned back to the server.

This is know as "brainless ai"

[barbolani 198]

Uh, good one. But, it's happening in non HC platforms, I made some tests and with no HC params are returning ok, I think it's hard to change ownership from the server to anything else, specially if all the HC settings are only done on server init, so HCs cannot JIP and thus having assigned AI ownership...

[dr death jm 117]

- AI becomes immune.

I've had this issue when a player joins and takes ai slot, then leaves ... ai doesn't  go back to the server. but then every so often I do get the problem without a player being involved.

damn bug misteries

[fn_Quiksilver 1633]

sounds like network issue

[barbolani 198]

Thanks guys.

 

I have server .rpts but not from clients, lets hope some client error is flooding clients... will report you!

[barbolani 198]

Hi!

 

Investigations I made so far:

 

There is no HC issue, as people without it is experiencing it.

 

The only reason I may think is there is some pesky while {true} loop which has no sleep delay and it's flooding the server or HC because the condition to exitWith is not met.

 

I am checking the ton of scripts but no success.

 

Is there any debugging technique which you may advice or another possibility?

[davidoss 550]

Well i have an idea.

Try run debug for each scripts and fsm (if any), using this code

{diag_log str _x} forEach diag_activeMissionFSMs;
{diag_log str _x} forEach diag_activeSQFScripts;
{diag_log str _x} forEach diag_activeSQSScripts;

Wait for bad behavior happen, check RPT for which script was running at that time.

[dr death jm 117]

Well i have an idea.

Try run debug for each scripts and fsm (if any), using this code

{diag_log str _x} forEach diag_activeMissionFSMs;
{diag_log str _x} forEach diag_activeSQFScripts;
{diag_log str _x} forEach diag_activeSQSScripts;

Wait for bad behavior happen, check RPT for which script was running at that time.

I've never seen it done like this. very good thanks david

[barbolani 198]

I could do, but I work with several tons of scripts, so this will leave it in a "big short list".

 

I reviewed all the while loops and found some possible unlimited loops with no sleep, it can be there.

 

And also found findEmptyPosition, which I use it a lot, with heavy radius, no matter what minimum, freezes the game for several seconds, that command should be improved as it waits to do the whole search until it returns. This + "I am not finding the space you need to, so try again" may freeze the server easily.

 

Tanoa is very tricky to find dynamic landing positions for helis. BIS_fnc_findSafePos is not bulletproofed, and sometimes, for a big heli, there is no room in several hundreds of meters for it to land.

[fn_Quiksilver 1633]

I could do, but I work with several tons of scripts, so this will leave it in a "big short list".

 

I reviewed all the while loops and found some possible unlimited loops with no sleep, it can be there.

 

And also found findEmptyPosition, which I use it a lot, with heavy radius, no matter what minimum, freezes the game for several seconds, that command should be improved as it waits to do the whole search until it returns. This + "I am not finding the space you need to, so try again" may freeze the server easily.

 

Tanoa is very tricky to find dynamic landing positions for helis. BIS_fnc_findSafePos is not bulletproofed, and sometimes, for a big heli, there is no room in several hundreds of meters for it to land.

 

yep, if using while loop always have some kind of sleep :)

 

theres no easy solution to finding positions, especially for LZ

 

put this in loop for the landing script

 

https://community.bistudio.com/wiki/landResult

 

give heli some time to find LZ, if it fails, have heli do something else or go somewhere else

[barbolani 198]

Good idea!

 

My workaround is: no land positions? Then fastrope :)