DeadLock Occurs between a propagation receiver and job_queue_process when Two Advanced Queues with matching object_ids are propagating to each other Concurrently (Doc ID 1450501.1)

Last updated on SEPTEMBER 02, 2015

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 11.2.0.3 [Release 10.2 to 11.2]
Information in this document applies to any platform.

Symptoms

AQ bi-directional propagation between two databases intermittently hangs.

There are 2 queues in each of the databases SYNCH_IN_QUEUE and SYNCH_OUT_QUEUE. DB1's synch_out_queue propagates messages to DB2's synch_in_queue. DB2's synch_out_queue propagates messages to DB1's synch_in_queue.

Intermittently a hang arises between a propagation receiver process and a job_queue_process related to DML being performed on sys.aq$_propagation_status.

Cause

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