URL task not executing

System

URL tasks in my wf are not executing . Infact no log is getting written into the log files. I m using log4j for writing the logs. The wf gets stuck in an active state .
I have checked the server.log in ApplicationContainer , also the content_centre.log in /opt/iw-home/logs/iwui. But I do not see anything logged there too.

Kindly advice,

Mav