AWS & Claude Engineering
Building enterprise AWS
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Writing what I learn.
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Latest posts
View all →Fix Cognito User Pool Authentication and Token Errors
Troubleshoot Cognito NotAuthorizedException errors, expired or invalid JWT tokens, app client misconfiguration, and Lambda trigger failures blocking sign-in.
Fix EFS Mount Timeout and Performance Issues
Troubleshoot Amazon EFS mount timeouts, mount target availability zone mismatches, security group errors, and throughput throttling under general purpose mode.
Fix Amazon OpenSearch Service Cluster Yellow and Red Status
Troubleshoot OpenSearch Service cluster status stuck yellow or red, unassigned shards, JVM memory pressure, and disk watermark issues blocking writes.