Getting delayed responses that is not specified in the VSI response think time spec

Products

• CA Application Test
• Service Virtualization

Issue/Introduction

Getting inconsistent responses from VSM even when running single transactions.

Environment

All Supported DevTest Releases.

Cause

Check if a think time value is specified in one of the VSM steps.

Not all the steps inside a VSM will honor the think time.

In a HTTP VSM, the following steps honor the think time:

Virtual Service Router,  VS Image Response Selection, Virtual HTTPS Live Invocation, Virtual Service Tracking, Live System Failure

The steps that do not honor the think time: 

Virtual HTTPS Listener and Virtual HTTPS Responder

The think time specified in each VSM step will be summed up to the response time.

If the VSM executes two steps with 5 seconds think time each, it will send the response after 10 seconds.

If the total think time specified in the VSM is higher than the think time specified in the VSI response, the VSI response think time spec won't be added to the response time.

If the total think time specified in the VSM is lower than the think time specified in the VSI response, the response time will be what is specified in the VSI response only. The VSM step think time won't be added to the response time.

The think scale applies to the think time specified in the VSM steps as well.

Resolution

If no think time is needed in the VS then remove the think time value specified in the VSM steps.

Additional Information

Monitor Virtual Services - Think Scale

Change the Think Time of a VSI Response