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Graph/a7bb71b2-d562-45f8-b237-4a131879899f

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Event Notifications

a7bb71b2-d562-45f8-b237-4a131879899f

Event Notifications

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Updated4/30/2026

PageRank0.0000

Effectiveness0.000

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8 linked nodes

PERTAIN_TOProblem

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.

PERTAIN_TOProblem

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

PERTAIN_TOProblem

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.

PERTAIN_TOSolution

Then, have this event notification trigger a lambda function — on new file creation or file modification on bucket A. Tension: This isn't possible with s3 sync. Outcome: which copies the file from bucket A to bucket B.

PERTAIN_TOProblem

The AWS Lambda function is not being triggered when new files are uploaded to an S3 bucket. The configured S3 notification is set to respond to HTTP POST events, but no events occur and the code never runs.

PERTAIN_TOSolution

Change the S3 event configuration to use a broader object creation event such as “All Object Create Events” (e.g., s3:ObjectCreated:*) so the Lambda triggers for typical PutObject-based uploads.

PERTAIN_TOProblem

when I test the Lambda function using the S3-put option. Outcome: This is not the expected result.

PERTAIN_TOSolution

I have considered using decodeURIComponent to convert the + back to spaces — const key = decodeURIComponent(event.Records[0].s3.object.key);. Tension: I'm unsure if this is a reliable solution, or if I'm supposed to handle these keys differently. Outcome: convert the + back to spaces.

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