Micro Focus Expert
Micro Focus Expert

Support Tip: New Message Storm detection, suppression with OA >=11.12

Message storm occurs when an unusually high number of new messages arrive on the HPOM management server within a short time interval and flood the active message browser.

This phenomenon can lead to management server outages.


HP Operations agent can detect and suppress the message storm on a managed node.


Existing solution using ECS (prior to OA <11.12) - Message storm can be detected using ECS circuits on the OM server or agent node


•Special expertise is required to configure ECS circuits

•Message storm detection is only based on the policy source



New easy to implement message storm detection mechanism has been implemented in OA >=11.12 version.


Advantages of the new solution

•No ECS circuits are required

•Message storm is identified at the source

•Storm detection logic is implemented within the message agent (opcmsga)

•Very easy to configure (via XPL configuration parameters)

•Can be configured for various message attributes


Agent can be configured to detect a message storm based on parameters under [eaagt.msgstorm] namespace in XPL config

Configuration parameters:



•OPC_MSG_STORM_RATE=<Threshold:Duration:Reset> *





(* Mandatory parameters)



Check OA 11.12 User Guide:


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