Read the statement by Michael Teeuw here.
Core dump causing black screen
-
Yeah I realize it is out of memory but what module is causing that? I have a core dump and I should be able to use gdb to see the stack trace to try to figure it out.
-
@mlcampbe no idea… I just caused a core dump on mine by comparing a whole structure to a string variable… (not on purpose) it didn’t tell me which module caused it
-
@mlcampbe - It definitely sounds like there is a memory leak somewhere. Personally, I blame electron. Basically out of spite, not any technical reason.
I would recommend that you add a cron job that will reboot your mirror at some absurd hour in the morning. It should reset the memory allocation and prevent OOM errors. It’s not a fix, but it should get you close enough.
-
Yeah that is a good idea and I might go that way as a last resort if I can’t identify which module is the culprit.
This morning I discovered the MMM-Logging module which prints date/time info into the logs and I am hoping that might help me match the coredump time to which module was doing something.
I also discovered a potential issue with the MMM-DailyBibleVerse module. I see that it has a getScripts function that loads the jquery-3.1.1.min.js file from its module directory. I am not sure if that is getting loaded over and over and thus eventually running out of memory but for now have removed that module for testing.
-
@mlcampbe getscripts is only called once per module
-
@mlcampbe see this https://www.javascriptjanuary.com/blog/nodejs-postmortem-debugging-for-fun-and-production
u need ulimit -c set to some non-0 number (number of core dumps)
0 by default
-
@sdetweil I am already getting core dumps generated so I have the file. I had see the nodejs postmortem debugging and I can get a stack trace from the core file but so far I have not been able to identify which module was active at the time from it.
Doing more research shows that this may be related to MMM-WallPaper which I am using. I found https://github.com/kolbyjack/MMM-Wallpaper/issues/3 that seems to match my symptoms exactly. I’m removing that module and will test it a few days and see what happens.
