eclipse debug jspwriter output

Recently I send a lot of time debugging other people's code, and a lot of it is using obsolete servlets etc.
What bothers me the most is how can I watch the progress of filling buffer for jspwriter before it is actually flushed out?
The problem is that in those servlets not only HTML and JSP are created but JavaScript as well and quite often I have to catch where is error.
Any ideas or suggestions how should I do this?
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

It is directly mapped to socket buffer.... Use system tracing, traffic dmping and other lowlevel tools.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
KPaxAuthor Commented:
OK, I haven't done that before, but I will try. Do you have anything more to suggest?
It is abstraction of output buffer that you should not even try to control.... Just let it be.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Editors IDEs

From novice to tech pro — start learning today.