What to do if messages are building up on your SYSTEM.MANAGED.DURABLE queues or filling your file system

If the IBM MQ Explorer plug-in uses a durable subscription on the coordination queue manager, messages can build up on the SYSTEM.MANAGED.DURABLE queues. If we have a high-volume Managed File Transfer network, use the IBM MQ Explorer plug-in infrequently, or both, this message data can fill the local file system.

To remove the buildup of messages on the SYSTEM.MANAGED.DURABLE queues, we can perform one of the following actions:

  • Start the IBM MQ Explorer that uses the durable subscription. The Managed File Transfer plug-in for IBM MQ Explorer consumes the messages from the queue.
  • Delete the messages from the queues manually.

We can avoid the build up of messages on durable queues in one of the following ways:

  • Specify that the IBM MQ Explorer plug-in uses a non-durable subscription to the coordination queue manager. Perform the following steps in your IBM MQ Explorer:
    1. Select Window > Preferences > IBM MQ Explorer > Managed File Transfer
    2. From the Transfer Log subscription type list, choose NON_DURABLE.

  • Clear durable subscriptions from the coordination queue manager that are created by the IBM MQ Explorer MFT plugin.

    The name of the durable subscription is prefixed to show that the subscription was created by the IBM MQ Explorer MFT plug-in, the host name, and the name of the user, for example MQExplorer_MFT_Plugin_HOST_TJWatson.

Parent topic: MFT general troubleshooting


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