Sync from PBS to PBS failed: too many open files

[ednt]

On friday I created a sync job to copy files from PBS-02 to PBS-01
PBS-02 has different datastores and PBS-01 uses the 'new' namespace feature.

Both PBS are running the latest no-subscription version 2.2.5
Updated 29.07.2022 and both rebootet,

On PBS-01 (target) I get:

2022-07-31T18:00:00+02:00: Starting datastore sync job 'pk-pbs-02:backup-61:pk-pbs-01:backup-61:s-25c4e946-498b'
2022-07-31T18:00:00+02:00: task triggered by schedule '18:00'
2022-07-31T18:00:00+02:00: sync datastore 'pk-pbs-01' from 'pk-pbs-02/backup-61'
2022-07-31T18:00:00+02:00: ----
2022-07-31T18:00:00+02:00: Syncing datastore 'backup-61', root namespace into datastore 'pk-pbs-01', namespace 'backup-61'
2022-07-31T18:00:00+02:00: Encountered errors while syncing namespace  - Failed to retrieve backup groups from remote - EMFILE: Too many open files
2022-07-31T18:00:00+02:00: TASK ERROR: sync failed with some errors.

On PBS-02 (source) I get:
nothing, since I had to reboot it this morning, cause of the well known 'iLO bug and the interrupt'.

It worked once on 28.07.2022:

2022-07-28T18:00:00+02:00: Starting datastore sync job 'pk-pbs-02:backup-61:pk-pbs-01:backup-61:s-25c4e946-498b'
2022-07-28T18:00:00+02:00: task triggered by schedule '18:00'
2022-07-28T18:00:00+02:00: sync datastore 'pk-pbs-01' from 'pk-pbs-02/backup-61'
2022-07-28T18:00:00+02:00: ----
2022-07-28T18:00:00+02:00: Syncing datastore 'backup-61', root namespace into datastore 'pk-pbs-01', namespace 'backup-61'
2022-07-28T18:00:03+02:00: found 23 groups to sync
...

Nothing changed in the configurations.


Any ideas?

Btw. the normal backups are starting at 11pm.