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Terminating The Instance Due To Error 443 And Startup Nomount Fails With ORA-00443 On AIX (Doc ID 2411146.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 12.1 to 18.1]
Information in this document applies to any platform.


As part of the upgrade, starting the instance from 12.2 and not able to open database from target home. Upgrade activity has not started yet.

SQL> startup upgrade
ORA-00443: background process "GEN1" did not start
SQL> startup nomount
ORA-00443: background process "GEN1" did not start

Alert log snippet is below and not much clues or traces are not generated.

MMAN started with pid=7, OS id=58130756
Starting background process GEN1
Process GEN1 died, see its trace file
USER (ospid: 65536040): terminating the instance due to error 443
Instance terminated by USER, pid = 65536040

If we start with the existing 11g home database is able to start. 




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