Unable to connect to external webservice using tREST or tRESTClient

[Anonymous]

Hi, 

I have tried connecting to an external web service using a tREST and tRESTClient component but every time I run the job it uses a different port and about 1 in 10 times it will successfully connect and the other 9 times I get the following error. 

I can connect successfully with Postman using the same endpoint and same user, sending several requests subsequently (with ~1s gap) with no issues and get a full response every time. 

Would anyone know if Talend is blocking something or how I would go about fixing the error. 

Many thanks in advance 

[Jesperrekuh]

Session / Cookies. tREST starts a new session each time (im not 100% sure)
Postmen probably stores the session.