I scheduled several jobs in Enterprise Manager Cloud Control 12c (188.8.131.52 on AIX5.3) across several databases. All work fine until a certain point in time that for some databases the job fails with 'Missing credentials" status even though I did not changed anything either in EM and in databases. If I resubmit the job for that database, it works fine.
Following that error, I have to create a new job and reschedule it as the previous one. Rather annoying.
I'm wondering what can break these jobs. Anyone has ever seen this behavior, know what could be the reason and how to workaround ?