Oracle backup failing with "RMAN-03009: failure of allocate command on cspfile channel at <date, time>
Data Plugin <OracleServerName> ORA-03113: end-of-file on communication channel"
This can happen if more than one backup is attempted on a database at a time.
Restarting the Oracle service or rebooting the Oracle server has resolved the issue and allowed the backups to continue.
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