Message Redelivery

Qualified messages will be redelivered in a failover situation.

  • Persistent

    When a failure occurs, messages with delivery mode PERSISTENT, that were not successfully acknowledged before the failure, are redelivered.

  • Synchronous Mode

    When using durable subscribers, EMS guarantees that a message with PERSISTENT delivery mode and written to a store with the property mode=sync, will not be lost during a failure.

  • Delivery Succeeded

    Any messages that have been successfully acknowledged or committed are not redelivered, in compliance with the Jakarta Messaging specification.

  • Topics

    All topic subscribers continue normal operation after a failover.