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Graph/s3-stream-checksum-length-mismatch

Pattern

Seekable Uploads Requirement

s3-stream-checksum-length-mismatch

A recurring async S3 upload failure where non-seekable or streaming bodies break checksum/length expectations, leading to MissingContentLength, BadDigest, or checksum wrapper rewind errors that are mitigated by using the CRT client and seekable streams.

Node Details

Public graph metadata

Updated5/1/2026

Connections

30 linked nodes

one of my requests to retrieve a photo fails with a 400: BAD_REQUEST error. Code: INVALID_IMAGE_OPTIMIZE_REQUEST — When I execute from my production server. Tension: In staging, the request successfully retrieves this image on the production S3, and production is able to retrieve an image from the staging S3. Outcome: The way I optimized the images was by using an absolute path.

trying to get an object from my S3 bucket using pre-signed URLs. Tension: I've tried encoding the slashes `%2f` with no change. Outcome: upgrade to the latest SDK, in your case boto3.

using pre-signed-url, I can't check the file size of each part — multipart upload in my application. Tension: all the options I thought do not appear to be good one. Outcome: I really would not like to get the file in any endpoint of my application.

fails with a 403 Forbidden error and the message CannotVerifyCopySource — I'm trying to copy a CSV file from an AWS S3 bucket to Azure Blob Storage using AzCopy. Tension: The command executes but fails.

the file is remaining in the bucket sometimes with delete markers — when the function runs via the S3 trigger. Tension: If I run the function using the Test button afterwards, it deletes every time. Outcome: I was able to resolve this by using Cloudwatch EventBridge to monitor S3 CreateObject event.

S3 blocking requests (403 Forbidden, no response body) if the filename is constructed from Unicode codepoints — Upload via presigned request - 403 forbidden for Unicode Filename. Tension: filename is constructed from Unicode codepoints. Outcome: Using `x-amz-meta-filename` suggests that the user-provided meta-data is transferred via HTTP request headers.

aws s3 sync and aws s3 cp fail with MissingContentLength / stream is not seekable errors

This isn't possible with s3 sync — I have an S3 bucket which does not have versioning or lifecycle rules set due to a client decision. Tension: we also want to keep a backup of the files that has been worked on in the last 30 days. Outcome: it would be a perfect use case for S3 bucket Event notifications.

This doesn't error but the resulting hashes are not correct. Tension: I need to calculate the SHA256 and SHA512 hashes of a very large file held in AWS S3. Outcome: Mark's answer is the correct one.

All of the put/upload functions want a set content length. Tension: Building the zip locally is not an option, because the end size of the zip can be tens of GB. Outcome: I essentially need a zip "placeholder" on S3 that I can stream to.

The HTTP request cannot be executed: The peer resets the connection. — When I try to upload files to S3 from storage via an application deployed on the stand. Tension: Everything is working locally. All files is uploading without errors. Outcome: com.amazonaws.SdkClientException exception.

nothing is getting written to the s3 bucket — trying to use ytdl-core in an AWS lambda function to upload an .mp4 of a youtube video to an S3 bucket. Tension: I cannot get ytdl to create a stream with any data in it. Outcome: Right now nothing is getting pushed to the buffer or the s3 bucket.

it is uploaded to the `S3 bucket`, but when checking the file's content, it is empty(blank file). — We have a S3 bucket where we upload some files. Tension: Everything is working fine, but getting blank documents in the S3 bucket. Outcome: it worked.

I keep encountering a SignatureDoesNotMatch error. — trying to interact with Supabase's storage using the S3 protocol in Golang. Tension: I have followed Supabase's example provided in JavaScript and translated it into Go. Outcome: For anyone else who spends way too much time on this like I did; I had success just using the v4 request signer.

The specified copy source is larger than the maximum allowable size for a copy source: 5368709120 — I have a PHP file which copies backup files from one folder to another in Amazon S3 at the end of every day. Tension: I believe Amazon S3 requires Multi-part copying for files over that size. Outcome: I think that I now need the script to look at the size of each file and use Multi-part uploading if it finds a file over 5GB.

facing throttling issues (503 errors) — writing to S3, and facing throttling issues (503 errors). Tension: our ingestion service still encounters 503 errors. Outcome: the files are showing right under my bucket at the root level.

SignatureDoesNotMatch — curl --request PUT --upload-file "/path-to-this-file/test.html" "presigned-url". Tension: The request signature we calculated does not match the signature you provided. Outcome: where did I do incorrectly and how to resolve it?

HTTPClientError: An HTTP Client raised an unhandled exception: sequence item 0: expected str instance, bytes found — save it into a S3 bucket. Tension: My issue is I have added a python `requests` layer which somehow messed with how Lambda send the object to s3 using https. Outcome: The error is gone if I remove the layer.

Directly putting objects from user input (`MemoryStream`) to an S3 object storage using Min.IO. Tension: Exception has occurred: CLR/Minio.Exceptions.UnexpectedShortReadException. Outcome: To solve the issue, we have to reset the pointer on our own before passing it to MinIO Client SDK.

Uploading to S3 via a presigned PUT URL does not apply the desired object tags even when the server-side PutObjectCommand includes the Tagging parameter.

SSL validation failed for https://bucketname.s3.amazonaws.com/ [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate — when loading a file to S3 bucket. Tension: python not able to find certain certificates. Outcome: apply the following parameter when creating the s3 object.

Unit tests cannot deterministically simulate S3 upload failure

Minio upload with a stream blocks until the file stream is closed

updating the connection of an s3 bucket, from TLS 1.0 to TLS1.2 — the following connection has been detected: `eu-west-3|bucket| REST.GET.OBJECT|TLSv1|62|[BPImageWalker/2.0 (www.bdbrandprotect.com)]`. Tension: I have been unable to detect where it comes from. Outcome: cloudtrail to detect TLS 1.0 connections and the results are 0.

aws s3 ls s3://bucketname > out.txt does not efficiently export 10m S3 objects as file URLs

Accessing /admin in a NextJS app using the PayloadCMS S3Storage plugin fails with the error: "useUploadHandlers must be used within UploadHandlersProvider".

415 Unsupported Media Type — upload a property object (JSON) along with multiple images using `multipart/form-data`. Tension: Content-Type 'application/octet-stream' is not supported. Outcome: Here is a Postman example that worked for me with Spring.

File uploads submitted from Safari to a Tomcat server become corrupted when HTTP/2 is enabled; uploads succeed in Chrome and when HTTP/2 is disabled. The issue affects multiple medium-sized files (a few MB).

It gets stuck at `multi.skipPreamble()` — I'm trying to read a sequence of image frames from a webcam's MJPEG stream. Tension: Another 200 ok (+4 headers) in the middle of a multipart is not normal for mutipart. Outcome: You should try stepping into this code to see if it mistakenly pickup the repeated boundary=myboundary from the unexpectedly repeated 4 headers.

Got HTTP 400 with "missing mcp-session-id" on every call. Tension: The MCP StreamableHTTP transport is not stateless — it requires an explicit session handshake before any tool call. Outcome: Implement the full session lifecycle in the client.

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