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fix(passthrough): log upstream 4xx/5xx error bodies and carry them into the failure hook - #42695

Merged

yucheng-berri merged 15 commits into

mainfrom

litellm_passthrough_upstream_error_body_logging

Sep 24, 2026

Commits on Sep 23, 2026

test(integration): reproduce passthrough upstream error body missing from logs and spend row

yucheng-berri
and
devin-ai-integration[bot]
committed
4f401a8
fix(passthrough): log upstream 4xx/5xx error bodies and carry them into the failure hook

yucheng-berri
and
devin-ai-integration[bot]
committed
e0c70f1
fix(error_normalization): let the passthrough prefix win over upstream body text

yucheng-berri
and
devin-ai-integration[bot]
committed
566060a
fix(passthrough): honor message redaction for upstream error bodies

yucheng-berri
and
devin-ai-integration[bot]
committed
2ab1a2e
fix(passthrough): bound the upstream error body read and sanitize it before logging

yucheng-berri
and
devin-ai-integration[bot]
committed
23c8a9c
refactor(passthrough): use the Sequence import directly in the allowed-routes cast

yucheng-berri
and
devin-ai-integration[bot]
committed
4b44ff4
fix(passthrough): rechunk the upstream error stream so the preview read stays bounded

yucheng-berri
and
devin-ai-integration[bot]
committed
a947ba7
test(integration): audit matrix for passthrough upstream error visibility

yucheng-berri
and
devin-ai-integration[bot]
committed
24c5ace
Merge remote-tracking branch 'origin/main' into litellm_passthrough_upstream_error_body_logging
yucheng-berri
committed
7723d5b
fix(passthrough): drop the restating docstring on the upstream failure logger

yucheng-berri
and
devin-ai-integration[bot]
committed
ddcef2e
merge: origin/main into litellm_passthrough_upstream_error_body_logging

yucheng-berri
and
devin-ai-integration[bot]
committed
229938c
test(integration): drop the retired covers markers from the passthrough error tests

yucheng-berri
and
devin-ai-integration[bot]
committed
23a7284
fix(passthrough): keep the upstream status when the error body peek fails

yucheng-berri
and
devin-ai-integration[bot]
committed
8618621
test(passthrough): cover the relay aclose in the mid-read failure test

yucheng-berri
and
devin-ai-integration[bot]
committed
5d57d25
fix(passthrough): relay decoded partial body on mid-read failure

yucheng-berri
and
devin-ai-integration[bot]
committed
c3c5676

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fix(passthrough): log upstream 4xx/5xx error bodies and carry them into the failure hook - #42695

fix(passthrough): log upstream 4xx/5xx error bodies and carry them into the failure hook#42695
yucheng-berri merged 15 commits into
mainfrom
litellm_passthrough_upstream_error_body_logging

Commits on Sep 23, 2026

test(integration): reproduce passthrough upstream error body missing from logs and spend row

fix(passthrough): log upstream 4xx/5xx error bodies and carry them into the failure hook

fix(error_normalization): let the passthrough prefix win over upstream body text

fix(passthrough): honor message redaction for upstream error bodies

fix(passthrough): bound the upstream error body read and sanitize it before logging

refactor(passthrough): use the Sequence import directly in the allowed-routes cast

fix(passthrough): rechunk the upstream error stream so the preview read stays bounded

test(integration): audit matrix for passthrough upstream error visibility

Merge remote-tracking branch 'origin/main' into litellm_passthrough_upstream_error_body_logging

fix(passthrough): drop the restating docstring on the upstream failure logger

merge: origin/main into litellm_passthrough_upstream_error_body_logging

test(integration): drop the retired covers markers from the passthrough error tests

fix(passthrough): keep the upstream status when the error body peek fails

test(passthrough): cover the relay aclose in the mid-read failure test

fix(passthrough): relay decoded partial body on mid-read failure