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AQ item re-dequeued after database restart

in PL/SQL (MOSC) Question

Data version is 19.22.0.0.0 on HP-UX.

Our application has been using AQ for about a year, with about 10 million items enqeueud/dequeued daily.

No problems with this, until earlier this week we had a scheduled shutdown of the databases for server maintenance. With these we normally disable the several dequeue jobs before shutdown. After startup, the jobs are re-enabled.

What happened this week was queue items that had been dequeued 5 days ago were re-dequeued after startup. We use a single queue table for various CSV type data records, and with a separate subscriber and priority for each record type. The requeued ones were for a particular message type, and within a specific enqueued time-frame.

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