I've tried almost all files from 28-feb, and it fails to recover those, e.g.:
/a/backup/labswiki-20160301.sql.gz
both in silver and in other hosts. I thought I was doing something wrong, but recovering files from other host "just works" without problem.
The error I get every time is:
29-Mar 20:39 dbstore1001.eqiad.wmnet-fd JobId 29292: Error: restore.c:780 Failed to initialize decryption context for /srv/T130892/a/backup/labswiki-20160228.sql.gz
(this is trying to recover to a different host, but same error is shown on the original host).
The files are recognized, if there were no files, the recovery is not even started.
I think there were previous errors, but at least not anymore since I upgraded ssl/restarted the bacula-fd service.