Unable to create a core dump

Rocky Linux Help & Support
1

Dear all,

I have a couple of boxes that have been upgrade to 9.6 and now I have a program that is crashing and trying to create a dump. The problem the creation is disabled becasue of the “Resource Limits”:

May 4 13:17:44 servername systemd[1]: Started Process Core Dump (PID 10592/UID 0).
May 4 13:17:44 servername systemd-coredump[10593]: Resource limits disable core dumping for process 10419 (ark).
May 4 13:17:44 servername systemd-coredump[10593]: Process 10419 (ark) of user 14925 dumped core.
May 4 13:17:44 servername systemd[1]: systemd-coredump@1-10592-0.service: Deactivated successfully.

According to RH docs editing /etc/systemd/system.conf and adding LimitCORE=infinity (or/and DefaultLimitCORE=infinity) should be enough for the systemd procress to create the dump. So the file look slike:

[Manager]
DefaultLimitCORE=infinity
LimitCORE=infinity

I’ve also modified the limits in limits.conf

* - core unlimited

so the user with uid 14925 is unlimited:

[14925@servername ~]$ ulimit -c
unlimited

but nothing makes it work.

So, what limits is the message refering to?

TIA

2

Check that journal is persistent, and also check.

coredumpctl --no-pager list
cat /etc/systemd/coredump.conf

3

the journal is persistent:

# grep -i storage /etc/systemd/journald.conf
Storage=persistent

the dumps are listed, but they have no file :

TIME                           PID   UID  GID SIG     COREFILE EXE                                                                                         SIZE
Thu 2026-04-30 14:37:45 UTC  25398 24207 3206 SIGABRT none     /usr/lib/rstudio-server/bin/positron-server/bundled/extensions/positron-r/resources/ark/ark    -

the content of coredump.conf now looks like:

[Coredump]
Storage=external
#Compress=yes
#ProcessSizeMax=1G
#ExternalSizeMax=1G
#JournalSizeMax=767M
#MaxUse=
#KeepFree=

thanks for your answer

4

Does your system have enough ram for this?

5

12 GB. Not sure how much memory it needs for this, TBH.

6

Ok, but it’s all commented out!

Can you try uncomment

ProcessSizeMax=1G
ExternalSizeMax=1G
7

Sorry for my late answer. Seems like this was my mistake, after commenting out those lines teh core cump is there.
thanks!