ora-03113 End-of-file on communication channel fault handling

Occurs when the customer database is open

In the alter alarm log, prompt:

No more information is prompted in the alarm log, and I find the Oracle trace log according to process id:81228:

Tip the sequence number of the control file does not match.

After the processing process:

Start the database to the Nomount state, then use RMAN to recover the last backed up control file from the backup, then mount the database, and then execute recover. ‘

The last Open database open resetlogs. (Don't know why you can't use ALTER DATABASE open noresetlogs?)

Then make a full backup of the database.

ora-03113 End-of-file on communication channel fault handling