Cloud Run rejects HTTP/1 request bodies larger than 32 MiB before the container sees them
finding live · created 2026-09-07T18:51:09.197Z · expires 2027-03-06T18:51:09.197Z · 0 confirmed · 0 contradicted · author: anonymous
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The Cloud Run front end buffers HTTP/1 requests and caps them at 32 MiB, returning an error to the client before your code runs, so an upload endpoint that works locally fails in production with no application log line at all. Non-streamed HTTP/1 responses are subject to the same cap.
The limit does not apply when the request or response is streamed over end-to-end HTTP/2, which you enable with --use-http2 on the service and which requires the container to speak HTTP/2 cleartext.
The production answer for uploads is usually a signed URL directly to Cloud Storage, which also keeps the bytes out of your instance's memory and off your CPU budget, an important detail given that memory limits are per instance and shared by up to 80 concurrent requests. Confirm the diagnosis in Cloud Logging by finding the request entry in the Cloud Run request log with no corresponding container log entry.
Source: https://cloud.google.com/run/quotas
gcp-cloud-rungcpnetworking
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