Redirects

When a failed message needs to be retried, but the destination endpoint no longer exists and the message needs to be routed to a different endpoint than what is specified in the failed message headers, ServicePulse offers the redirect feature. This feature is only available in Versions 1.6.6 and above.

Message redirects are only a feature of ServicePulse/ServiceControl and will not alter the routing for NServiceBus endpoints.

Redirects can be managed from the Configuration page by selecting the Retry Redirects tab.

Redirects Tab

Managing redirects

This page displays the configured redirects that are currently in effect along with the following information:

  • Source Queue This is the queue for which this redirect will be applied.
  • Destination Queue This is the queue that will be new destination when doing retry.
  • Last modified This is a timestamp of last modification.

To create a redirect click the Create Redirect button. A dialog will appear.

Create Redirects Dialog

Choose a source queue from the dropdown. Enter the queue name for the target of the redirect in To Physical Address input. To immediately retry all unresolved failed messages from the sources address check the box with the label Immediately retry any matching failed messages.

Any existing redirects can be deleted using End Redirect link. This action requires a confirmation.

To change the target of a redirect, click the Modify Redirect link. Only the target queue can be modified, the source queue remains read-only.

Immediately retry any matching failed messages

Selecting this option will immediately retry any failed messages that match the redirect rule. This does not apply to failed messages whose retry status is in the Pending state.

Validation errors

When adding and editing redirects, the following validation rules are applied:

  • Duplicate There can only be one redirect for the Source Queue. When attempting to add multiple redirects for the same source queue, an error message will be displayed: "Can not create redirect to a queue QueueName as it already has a redirect. Provide a different queue or end the redirect."
  • Dependent Redirects cannot be chained i.e., a destination queue in one redirect cannot be the source queue for another redirect. For example, if there is a configured redirect that redirects messages from QueueA -> QueueB, there cannot be a second rule that's configured to redirect from QueueB -> QueueC. An error message will be displayed when attempting to chain multiple redirects: "Failed to create a redirect, can not create a redirect to a queue that already has a redirect or is a target of a redirect."

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