Cause: The file header for the redo log contains a checksum that does not match the value calculated from the file header as read from disk. This means the file header is corrupted Action: Find the correct file and try again.
Cause: An attempt to switch to a new online log for the redo thread failed because no reusable log could be found. This log is being cleared and will be useable when the clearing completes. The command that began the clearing may have terminated without completing the clearing. Action: If the clear command is still…
Cause: Attempt to open thread failed because it is necessary to switch redo generation to another online log, but all the other logs are being cleared or need to be archived before they can be used. Action: If the ALTER DATABASE CLEAR LOGFILE command is still active then wait for it to complete. Otherwise reissue…
Cause: The network specified in the SQL*Net connect string is reserved for use by the dispatchers. Action: Specify other network protocols in the connection string.
Cause: The file header for the redo log contains a checksum that does not match the value calculated from the file header as read from disk. This means the file header is corrupted Action: Find and install correct version of log or reset logs.
Cause: A request to drop a logfile member was denied because it would remove data required to form a complete logfile. Action: If desired, delete the entire log (after archiving if required), by using DROP LOGFILE;
Cause: An add logfile member or drop logfile request specified a logfile group number that does not exist. Action: Check the configuration of the log files and reissue the command.
Cause: The log given to recovery is a backup of the online version from the time it was the current log. The archived version of the log would not be marked as end of thread. This error can also be caused by failing to list the current log of an enabled thread in a CREATE…
Cause: An add logfile or add logfile member command would result in a log with too many members. The number of members is set when the database is created. Action: Use fewer log file members.
Cause: An attempt has been made to remove the last member of a log file group. Action: If desired, delete the entire log, by using DROP LOGFILE.