Build and Deploy an Automatic Sync Solution for Amazon Bedrock Knowledge Bases

Introduction The AWS Blog post "Build and deploy an automatic sync solution for Amazon Bedrock Knowledge Bases" introduces a solution for automatically synchronizing documents with Amazon Bedrock Knowledge Bases. This AWS Blog post was published on April 27, 2026. During my validation in May 2026, I encountered two issues: S3 events routed via EventBridge were not being processed correctly, and the status was not being updated even after the Knowledge Base ingestion job completed. This article documents the fixes I applied to resolve these issues, the validation results, and operational considerations you should be aware of. References https://aws.amazon.com/blogs/machine-learning/build-and-deploy-an-automatic-sync-solution-for-amazon-bedrock-knowledge-bases/ https://docs.aws.amazon.com/AmazonS3/latest/userguide/ev-events.html https://github.com/aws-samples/sample-automatic-sync-for-bedrock-knowledge-bases https://github.com/revsystem/sample-automatic-sync-for