Only one instance running at a time confluence datacenter

[Elias Johansson]

We have a problem with our confluence webb server setup, we are currently running a datacenter setup with 2 webbservers behind a loadbalancer. however only on of the webbservers can run at a given time, if the second one starts, the first turns off and throws this error in catalina.out

13-Dec-2024 15:11:22.239 SEVERE [http-nio-8090-exec-19] org.apache.catalina.core.StandardHostValve.custom Exception Processing [ErrorPage[errorCode=500, location=/500page.jsp]]

org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is com.hazelcast.core.HazelcastInstanceNotActiveException: Hazelcast instance is not active!

[Humashankar VJ]

Hi @Elias Johansson 

The error in your catalina.out log indicates a transaction exception related to an inactive Hazelcast instance. This issue may have arisen due to improper communication between nodes or an unexpected shutdown of one node.

Verify that both nodes are correctly configured to form a cluster, that session stickiness is enabled in your load balancer, and there are no network or firewall issues preventing them from communicating.

Hope this helps - Happy to help further!!
Thank you very much and have a great one!
Warm regards