ORA-25219: enqueue failed, sequence deviation not allowed for queue string.string
Cause: An attempt was made to enqueue to a non-persistent queue with sequence deviation specified.
Action: Do not specify sequence deviation.
ORA-25219 is an Oracle Database error that indicates that the enqueue operation has failed because the sequence deviation is not allowed for the specified queue.
This error occurs when attempting to enqueue a message to a queue which has a sequence “deviation”. A sequence deviation indicates that the messages in the queue are not in the order they were intended.
The official explanation of ORA-25219 can be found in the Oracle Database Error Messages document.
An example of this error is when attempting to enqueue a message to a queue which has a sequence deviation. For instance, if the queue already contains some messages which were originally 3, 4, and 5 and an attempt is made to enqueue a message with the value “2”, an ORA-25219 error will be returned. Additionally, if the message with the value “2” is enqueued before any of the messages in the queue, then this will cause a sequence deviation.
The correct way to handle ORA-25219 is to ensure that messages in the queue are enqueued in order. If the sequence deviations cannot be avoided, then the enqueue process should be modified so that the messages can be enqueued without causing a sequence deviation.
Steps to resolve ORA-25219 include:
1. Ensure that no sequence deviations occur when attempting to enqueue a message to a queue.
2. Modify the enqueue process, if necessary, so that the messages can be enqueued without causing a sequence deviation.
3. Ensure that all necessary messages are in the queue before attempting to enqueue any other messages.