Re: [quicwg/base-drafts] NUM_PLACEHOLDERS MUST NOT be zero (#2753)

Kazuho Oku <> Fri, 24 May 2019 06:23 UTC

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From: Kazuho Oku <>
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Subject: Re: [quicwg/base-drafts] NUM_PLACEHOLDERS MUST NOT be zero (#2753)
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Maybe the alternative approach would be to:
* Remove the settings parameter, or make it a purely advisory variable like MAX_HEADER_LIST_SIZE allowing the client to exceed the advertised maximum.
* Recommend some sensible number of placeholders that a server is expected to retain (16 - the default value we had prior to merging #2038 - might make sense).

These changes would essentially bring back what we observe in HTTP/2 - server that ignore placeholders would just ignore.

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