Hi @skitbil, how often are you seeing this?  Does it occur when running specific workflow, or any workflow that connects to Unisphere for PowerMax?  Also, can you confirm that timeout was hit while Unipshere server was online?  Feel free to open a support case if you'd like related logs reviewed.

It's a custom workflow that have issues, that workflow invokes actions and workflows from the PowerMax module to achieve expansion of MetroDR volumes. Currently I get re-occurring read timeouts on the first task which is invoking the action "Get volume by WWN". The Unisphere server is online and reachable, re-running the very same workflow or something else right after the failure it works every time. 

I'll go ahead and open a case to get to the bottom with this.

Sounds good.  The escalation engineering team has a heads up about this issue and will get this resolved in your environment.  Thanks for reaching out!