after a few addons to the code - in totally irrelevant places - the error returns so it did not help.

Now i try to create a new upstream handler so i can use it instead of the subrequest model.

i described the model i work in the first post above. let me add this:
in my first tests of the upstream - i cannot get to the backend server at all - i just get the upstream response and nginx pass it directly to my filters and then to the client. my needs are different - after i recv the upstream response, i need it to go to the backend and then i'm going to inject some of the data i recv from the upstream - to the backend response and only then to the client.

can you tell me if creating a new upstream module (my examples are proxy/memcached) can suit my needs here ?
Tnx alot
Gad