Hi Dinesh,
I believe that there was something in the amq folder located in lisatmp that might be causing the WARN messages.
Stop DevTest components and try deleting lisatmp_x.x.x (where x.x.x is the version of DevTest you are running) folder and items in DevTest_Home/locks folder. Then start DevTest components and verify the WARN messages appear in logs or not.
If you still see the WARN messages, please open a support case.
Thanks,
Prema