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July 17, 2012 / doganay

ORA-00230: operation disallowed – snapshot control file enqueue unavailable

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Problem:

INF - RMAN-00571: ===========================================================
INF - RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
INF - RMAN-00571: ===========================================================
INF - RMAN-03009: failure of backup command on ch00 channel at 07/17/2012 09:53:58
INF - ORA-00230: operation disallowed: snapshot control file enqueue unavailable
INF - Recovery Manager complete.
INF - End of Recovery Manager output.
INF - End Oracle Recovery Manager.


Solution:

1) Kill this session:

SELECT s.sid, username AS "User", program, module, action, logon_time "Logon", l.*
FROM v$session s, v$enqueue_lock l
WHERE l.sid = s.sid and l.type = 'CF' AND l.id1 = 0 and l.id2 = 2;

2) Retry backup.

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