Handling Data correlation errors in IBM Rational Performance Tester (RPT)
Soumya Y Shanthimohan 270004GAQS Visits (3350)
A scenario where a web application was recorded using Rational Performance Tester (RPT).
After playback, data correlation errors were noticed in spite of manually creating the references. Upon analyzing the server responses, it was noted that some of the responses were sent in binary format.
Data correlation cannot be done on the response content if the data is in binary. The response should be in readable format to implement data correlation.
The below steps were followed and the script was re-recorded:
Open RPT Workbench -> Select 'Window' -> 'Preferences' -> Select 'Test' -> 'Test Generation' -> Select all the check boxes and record again.
The server responses after the above settings looked fine, however, the correlation errors still remained. Upon further investigation, it was noticed that the users ran into trouble at the "Home - Portal" page.
Instead of getting redirected to http
It was also noticed that the initial URL was rather odd, it had a jsessionid incorporated in it:
Usually the initial URL is rather generic, something like
The concern here is, Incorporating the jessesion (8AF54....) value in the URL for all the virtual users, the playback sessions for the multi-user playback are not fully differentiated by the server.
The issue was resolved by using a different URL without specific information like above.