Duplicate request bodies with ext_proc

[Swarvanu Sengupta]

Hey Envoy folks — quick question.  We’re seeing request bodies duplicated upstream (same JSON literally twice in one POST) when ext_proc is on the path with STREAMED body mode and the usual router retry config. Matches what Envoy describes in #36119 / fix #37994.

We’re on Envoy 1.33.3 — and we believe 1.33.x upstream doesn’t carry that fix, need 1.34+. Can someone confirm which Envoy (example 1.34.x) has this fix? Want to point our upgrade at the right version.

[Yanjun Xiang]

Please check this thread:

https://envoyproxy.slack.com/archives/C78M4KW76/p1775028499070499

On Mon, Apr 13, 2026 at 3:22 PM 'Swarvanu Sengupta' via envoy-dev <envo...@googlegroups.com> wrote:

Hey Envoy folks — quick question.  We’re seeing request bodies duplicated upstream (same JSON literally twice in one POST) when ext_proc is on the path with STREAMED body mode and the usual router retry config. Matches what Envoy describes in #36119 / fix #37994.

We’re on Envoy 1.33.3 — and we believe 1.33.x upstream doesn’t carry that fix, need 1.34+. Can someone confirm which Envoy (example 1.34.x) has this fix? Want to point our upgrade at the right version.

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