Restriction to the number of forwards in one request?

is it true, that the number of forwards you can do in one request is restricted?
someone told me, that ther is a restriction of 2 or 3 forwards since the servlet spec 2.2.
he told me further, that only the servlet engines, which follow the spec strictly, have problems with more forwards.
i have already tried to find any statement in the spec, but without success.
has anybody out there watched this problem?
thank you for helping me!

ok, i have found somehting in the spec:
"The forward method of the RequestDispatcher interface may only be called by the calling servlet if no output has been committed to the client... If the response has been committed, an IllegalServletException must be thrown."
But I see there no limitation in the number of forwards, as long as I do not make a response.
Is that right?

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