I got this issue resolved with help of one of community member... reolution in like we have to add
Map<String, Object> outputMap = new HashMap<String, Object>();
In our WI handler class......
The above approach is working fine when i am running the process from IED(read as eclipse) but when i put same code in Guvnor and do a deployment the process is not able to execute the step.
Can anyone give some pointer what could be the reason of this. In my WI handler i am also using an external jar and i am using this jar also as pert of deployment package