I just upgraded one of three servers from RHEL 9.2. to 9.3. I have a clone of our three servers, on which all three have been upgraded to 9.3.

All of the servers run a cron job

/sbin/ipa-backup --online --data > /usr/local/scripts/ipa-backup.log 2>&1

The LDAP server hung (needed kill -9) at about the time that job ran, on the production server but not the testing copy. Obviously I can't prove that the backup caused the hang, but it's suspicious. I've commented out the cron job, since the backup isn't actually all the useful. If we have to restore we'd use a snapshot of the VM.

The backup completed successfully on the clone. On the production server it failed. Here is the log:

Preparing backup on krb4.cs.rutgers.edu

Local roles match globally used roles, proceeding.

Backing up userRoot in CS-RUTGERS-EDU to LDIF

Waiting for LDIF to finish

Backing up CS-RUTGERS-EDU

Waiting for BAK to finish

cannot connect to 'ldapi://%2Frun%2Fslapd-CS-RUTGERS-EDU.socket':

The ipa-backup command failed. See /var/log/ipabackup.log for more information

I'm wondering whether there's a bug that only happens under load.

We're been doing this in production for years with no trouble up to RHEL 9.2.