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PostHeaderIcon When WebLogic always routes on the same node of the cluster…

Case

Since a couple of days I have met the following issue on my WebLogic server: one application is deployed on a cluster, which references two nodes. Load-balancing (in Round-Robin) is activated for JMS dispatching.

  • Yet, all JMS messages are received only by one node (let’s say “the first”), none is received by the other (let’s say “the second”).
  • When the 1st node falls, the 2nd receives the messages.
  • When the 1st node is started up again, the 2nd keeps on receving the messages.
  • When the 2nd node falls, the 1st receives the messages
  • and so on

Fix

In WebLogic console go to JMS Modules. In the table of resources, select the connection factory. Then go to the tab Configuration and Load Balance. Uncheck “Server Affinity Enabled“.

Now it should work.

Many thanks to Jeffrey A. West for his help via Twitter.

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