Thanks for the response.
Yes, the agent is assigned.
this is not the new pipeline it was working from last 2 years and suddenly start behaving like this.
i have found some batch scripts at agent installation folder like agent,start agent agent,stop agent etc... i have tried running these.
and Now i have started seeing the error below, dont it is because of that
has invalid cookie; nested exception is com.thoughtworks.go.server.service.AgentWithDuplicateUUIDException:
Please help on this.