Jobs (both dbms_scheduler and dbms_jobs jobs) are failing with ORA-01426: Numeric overflow.
Alert log shows job queue secondary (J00x) reporting the following messages:
ORA-12012: error on auto execute of job 4294967294
ORA-01426: numeric overflow
ORA-01426: numeric overflow
ORA-01426: numeric overflow
The job number reported is 4294967294 yet the current job sequence number (JOBSEQ from dba_sequences) is 21310.
Events '1426 trace name errorstack level 3' or '10046 trace name context forever, level 4' shows the following SQL statement failing with ORA-1426 error.