When creating routes, the EMS Admin tool displays, "Error: Implicit route to 'XYZ' already exists".
Article ID: KB0093371
Updated On:
| Products | Versions |
|---|---|
| TIBCO Enterprise Message Service | - |
| Not Applicable | - |
Description
For an instance, an environment contains three instances of the EMS Server A, B and C. There exists routes between A - B and A -C for destination (queue/topic routing). There is a requirement wherein the topic in server A and B needs to forward messages to server C. When the TIBCO EMS Administrator tries to create a route between B and C, the error, "Implicit route to <server_name> already exists" is generated.
Issue/Introduction
Resolution
If A, B and C are going to form a circle (A-B-C-A), the only way it will work is that:
1). Routes among A-B-C-A are use the same zone name.
2). Routes among A-B-C-A are all one hop.
Otherwise, potentially a message sent from A can be routed to B by two routes (A-B, A-C-B). This violates the requirement of "Unique Routing Path".
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Error: Implicit route to 'XYZ' already exists.
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This error message indicates that there is a loop in multiple zones. It is illegal to have a cycle in multiple zones. Refer to the TIBCO Enterprise Message Service User’s Guide -> Chapter 20 Working With Routes -> Zone, and examine Figure 36 > Zones: overlap. If you create a route from TK3 to NY1, it will generate a loop and you will get the error. You should avoid a loop when using routes across multiple zones. Note, if you configure all routes to be in the same zone, it will work fine. If it is not a requirement to use different zones, you could try using the same zone_name.
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