I had an idea to check /var/log for times when dumps were created. I found out that each crash has a corresponding line in the kern.log:
2021-04-25T18:57:02+03:00 DiskStation kernel: [688897.142755] Plex Media Serv[12423]: segfault at 0 ip 000000000191b40c sp 00007f39025a02d0 error 4 in Plex Media Server[a30000+f5b000]
2021-04-25T22:36:01+03:00 DiskStation kernel: [702036.101081] Plex Media Serv[11689]: segfault at 0 ip 000000000191b40c sp 00007f75276c02d0 error 4 in Plex Media Server[a30000+f5b000]
2021-04-26T16:18:30+03:00 DiskStation kernel: [63514.354013] Plex Media Serv[27817]: segfault at 0 ip 000000000191b40c sp 00007f37177342d0 error 4 in Plex Media Server[a30000+f5b000]
2021-04-28T15:35:03+03:00 DiskStation kernel: [233705.269365] Plex Media Serv[31643]: segfault at 0 ip 000000000191b40c sp 00007f3187a222d0 error 4 in Plex Media Server[a30000+f5b000]
2021-04-28T23:20:09+03:00 DiskStation kernel: [261610.109185] Plex Media Serv[21697]: segfault at 0 ip 000000000191b40c sp 00007f1b774462d0 error 4 in Plex Media Server[a30000+f5b000]
2021-04-29T05:00:26+03:00 DiskStation kernel: [282027.021927] Plex Media Serv[8842]: segfault at 0 ip 000000000191b40c sp 00007f8fa3d102d0 error 4 in Plex Media Server[a30000+f5b000]
2021-04-29T16:21:37+03:00 DiskStation kernel: [322897.805329] Plex Media Serv[26050]: segfault at 0 ip 000000000191b40c sp 00007f72794c32d0 error 4 in Plex Media Server[a30000+f5b000]
https://utcc.utoronto.ca/~cks/space/blog/linux/KernelSegfaultMessageMeaning
With a faulting address of 0 and an error code of 4, we know this particular segfault is a read of a null pointer.
Do you have more info on that? Could you relay that to the engineering team if possible?
I’ve never experienced segfault in Linux before, so I’m not sure what to do with it. Is the issue specific to some address in the Plex code, or should I also contact Synology support? Maybe I should do a memtest?
