Each request opens a new bidirectional stream, and the peer limits how many can
be opened (e.g., with QUIC MAX_STREAMS). A single FETCH can generate several
upstream FETCHes, each needing its own stream (see Section 3.2.3). A
relay that lacks stream credit to forward a request can fail it immediately with
UNAVAILABLE, or wait for credit and fail it with TIMEOUT if none arrives.
Either response can include a Retry Interval. Other requests from the same peer
can still succeed, since they might be served from cache or by a different
upstream.
§7.4
Request Stream Credit
This is one section of the MoQT specification, rendered per-section for quick reference and citation. The authoritative text is draft-ietf-moq-transport-23 at the IETF.