mongodb.service keeps failing couple of minutes after each restart

blicko · 2026-05-23 00:19:01

Greetings, I noticed this problem for the first time after pacman -Syu (idk if it is related). After starting mongosh I am getting error

Current Mongosh Log ID:	6a10f11f1cf6d7dbcfe43268
Connecting to:		mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+2.3.9
MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017

I checked if mongodb service works and it shows it failed with printed stack traces:

× mongodb.service - MongoDB Database Server
     Loaded: loaded (/usr/lib/systemd/system/mongodb.service; enabled; preset: disabled)
     Active: failed (Result: core-dump) since Sat 2026-05-23 02:08:13 CEST; 6min ago
   Duration: 1min 4.163s
 Invocation: a844d9d27e7e48c389b6d6d84af22b49
       Docs: https://docs.mongodb.org/manual
    Process: 803 ExecStart=/usr/bin/mongod --config /etc/mongodb.conf (code=dumped, signal=SEGV)
   Main PID: 803 (code=dumped, signal=SEGV)
   Mem peak: 406.1M
        CPU: 1.544s

May 23 02:07:08 Archimedes systemd[1]: Started MongoDB Database Server.
May 23 02:07:09 Archimedes mongod[803]: {"t":{"$date":"2026-05-23T02:07:09.463+02:00"},"s":"I",  "c":"-",        "id":8991200, "ctx":"main","msg":"Shuffl>
May 23 02:07:09 Archimedes mongod[803]: {"t":{"$date":"2026-05-23T02:07:09.479+02:00"},"s":"I",  "c":"CONTROL",  "id":7484500, "ctx":"main","msg":"Enviro>
May 23 02:08:12 Archimedes systemd-coredump[2405]: [?] Process 803 (mongod) of user 961 dumped core.
                                                   
                                                   Stack trace of thread 1027:
                                                   #0  0x000056160b3f395a _ZN5boost3log12v2s_mt_posix13attribute_setC1Ev (/usr/bin/mongod + 0xa04c95a)
                                                   #1  0x00005616057e003b _ZN5mongo5logv29LogSourceC2EPKNS0_9LogDomain8InternalEb (/usr/bin/mongod + 0x44>
                                                   #2  0x00005616057c6c7a _ZN5mongo5logv215LogDomainGlobal6sourceEv (/usr/bin/mongod + 0x441fc7a)
                                                   #3  0x0000561605801d73 _ZN5mongo5logv26detail10_doLogImplEiRKNS0_11LogSeverityERKNS0_10LogOptionsENS_1>
                                                   #4  0x000056160565776b _ZN5mongo5logv26detail9doLogImplEiRKNS0_11LogSeverityERKNS0_10LogOptionsENS_10S>
                                                   #5  0x000056160b30f1ca _ZN5mongo12_GLOBAL__N_126writeMallocFreeStreamToLogEv (/usr/bin/mongod + 0x9f68>
                                                   #6  0x000056160b30f8d0 abruptQuitWithAddrSignal (/usr/bin/mongod + 0x9f688d0)
                                                   #7  0x00007ff4a683e8f0 n/a (libc.so.6 + 0x3e8f0)
                                                   #8  0x0000561605896696 _ZN5mongo14JournalFlusher3runEv (/usr/bin/mongod + 0x44ef696)
                                                   #9  0x000056160b18026e _ZN5mongo13BackgroundJob7jobBodyEv (/usr/bin/mongod + 0x9dd926e)
                                                   #10 0x000056160b180757 _ZNSt6thread11_State_implINS_8_InvokerISt5tupleIJZN5mongo4stdx6threadC4IZNS3_13>
                                                   #11 0x000056160b6b4514 execute_native_thread_routine (/usr/bin/mongod + 0xa30d514)
                                                   #12 0x00007ff4a68981b9 n/a (libc.so.6 + 0x981b9)
                                                   #13 0x00007ff4a691d21c n/a (libc.so.6 + 0x11d21c)

with much more threads' stack traces but it is too long to paste. After I restart it, it works fine but after couple of minutes it fails again. Could anyone guess what it is? I would be very grateful.

Last edited by blicko (2026-05-23 00:20:00)

seth · 2026-05-23 07:02:28

with much more threads' stack traces but it is too long to paste.

1st link below, make sure to not copy&paste it out of the pager (">" indicates truncated lines) - the thread in the snippet is the SEGV handling and extremely unlikely to be the cause.

blicko · 2026-05-23 11:07:16

Great, that is a very useful advice. This is the full output of

sudo systemctl status mongodb

https://paste.c-net.org/RinseUproot

seth · 2026-05-23 11:51:43

No, the crash handler is the the culpable thread - fits https://www.reddit.com/r/mongodb/commen … v_on_arch/
https://www.mongodb.com/docs/manual/release-notes/8.2/
Does it work w/ the LTS kernel?

Arch Linux

#1 2026-05-23 00:19:01

mongodb.service keeps failing couple of minutes after each restart

#2 2026-05-23 07:02:28

Re: mongodb.service keeps failing couple of minutes after each restart

#3 2026-05-23 11:07:16

Re: mongodb.service keeps failing couple of minutes after each restart

#4 2026-05-23 11:51:43

Re: mongodb.service keeps failing couple of minutes after each restart

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