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    Core dump causing black screen

    Scheduled Pinned Locked Moved Unsolved Troubleshooting
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    • S Offline
      sdetweil @mlcampbe
      last edited by

      @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

      Sam

      How to add modules

      learning how to use browser developers window for css changes

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      • bheplerB Offline
        bhepler Module Developer @mlcampbe
        last edited by

        @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.

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        • M Offline
          mlcampbe
          last edited by

          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.

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          • S Offline
            sdetweil @mlcampbe
            last edited by

            @mlcampbe getscripts is only called once per module

            Sam

            How to add modules

            learning how to use browser developers window for css changes

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            • S Offline
              sdetweil @mlcampbe
              last edited by sdetweil

              @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

              Sam

              How to add modules

              learning how to use browser developers window for css changes

              M 1 Reply Last reply Reply Quote 0
              • M Offline
                mlcampbe @sdetweil
                last edited by

                @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.

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