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Can high CPU on secondary replica effect the primary replica in synchronous Always on AG?

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Hi All,

I got the following error on my primary replica when the CPU on the secondary server went 100% and no connections were allowed on secondary replica(only DAC was allowed)

"The connection to the primary replica is not active.  The command cannot be processed."

I also got huge no of blockings on primary replica(Node1) due to which almost all of our applications went down.

Could this be due to the huge CPU on Node2 which subsequently delayed the acknowledgement process? or it could be for any other reason?

Windows server 2016 

Node1 -> Node2 (synchronous always on AG)



Regards, Ashif Shaikh





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