ORA-7445 Followed By ORA-1000 "MAXIMUM OPEN CURSORS EXCEEDED" Error [ID 1138647.1]
Applies to:Oracle Server - Enterprise Edition - Version: 220.127.116.11 to 18.104.22.168 - Release: 9.2 to 11.2
Information in this document applies to any platform.
You are experiencing ORA-7445 core dump errors which are accompanied by ORA-1000 errors, e.g.:
ORA-07445: exception encountered: core dump  [SIGILL] [Illegal opcode] [0x000000000]  
ORA-00604: error occurred at recursive SQL level 1
ORA-01000: maximum open cursors exceeded
You may have already noticed that OPEN_CURSORS was set to a low value and corrected it by setting it higher and still encounter the errors.
CauseAs the errors suggest, this is due to the session running out of open cursor slots. This can often be traced back to a coding issue in the application where the code is opening many cursors and not explicitly closing them.
Reslove the ORA-1000 error by increasing the OPEN_CURSORS parameter value which will also stop the related ORA-7445 errors.