Resolution:
Description:
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In BusinessEvents 3.0.2, some questions about the sequence for restarting Cache Servers and Inference agents.


Environment:
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TIBCO BusinessEvents 3.0.2

Expalantions:
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Q). Can cache servers be restarted without restarting inference agents, as inference agents will go into a wait state?

A).  Order does not matter during initial startup since the cluster does not get ‘Activated’ until min-cache servers are up and pre-load is complete.

Q). In case of complete cache cluster failure, would just bringing up cache be enough while not worrying about inference agents?

A).  There are many use cases around it. Say, you have 10 Cache servers and 9 CS fail. In that case Inference agents will continue to run with no exceptions. Say all 10 CS go down. They will throw "StorageNotConfigured" errors. On restarting CS they will reconnect but we have not tested how preload of entities is done. Moreover, if you have large entities to load and start-up, then until the time CS are starting, the Inference agents will throw errors and will be idle.

In general we suggest to bring down Inference agents when bringing down the CS to have a clean restart of the system.