ORA-00257

oerr ora 0025700257, 00000, "archiver error. Connect internal only, until freed."// *Cause: The archiver process received an error while trying to archive// a redo log. If the problem is not resolved soon, the database// will stop executing transactions. The most likely cause of this// message is the destination device is out of space to store the// redo log file.// *Action: Check archiver trace file for a detailed description// of the problem. Also verify that the// device specified in the initialization parameter// ARCHIVE_LOG_DEST is set up properly for archiving.

Check that the archive space is sufficient, and the data has the parameters db_recovery_file_dest and db_recovery_file_dest_size

db_recovery_file_dest: The location of the flashback recovery area

db_recovery_file_dest_size: size of free space in the flash recovery area

Modify two parameters online...

This restriction is not recommended for production....