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  'AccessDeniedException' When Rekognition Is Blocked by IAM Permission Boundary # AWS # AmazonRekognition # IAM # CloudSecurity Why  AdministratorAccess  still fails when a permission boundary caps your role’s maximum permissions Category: IAM & Permission Boundaries Problem Your application calls  DetectLabels  in  Amazon Rekognition . The IAM role shows: AdministratorAccess  attached Explicit  rekognition:*  permissions No Service Control Policy blocking the account Yet the call fails with: AccessDeniedException: User is not authorized to perform: rekognition:DetectLabels IAM looks correct. SCPs are not involved. Still denied. Clarifying the Issue An IAM  permission boundary  may be attached to the role. A permission boundary is not a normal policy. It defines the  maximum permissions  the role is allowed to receive. Even if the role has  AdministratorAccess , the boundary acts as a ceiling. If the boundary doe...

  The Secret Life of AWS: The Principle of Least Privilege (IAM Roles & Policies) # AWS # IAMRoles # LeastPrivilege # DevOps Why  AdministratorAccess  is a security vulnerability, not a bug fix. Part 40 of The Secret Life of AWS Timothy stared at the console. His Lambda function, designed to upload user profile pictures to S3, was failing. Error:   AccessDenied: Access Denied "I don't have time to debug permissions," Timothy muttered. "I just need the function to write to the bucket." He navigated to the  IAM (Identity and Access Management)  console. He found the Execution Role for his Lambda function. He clicked  Attach Policy . He searched for  AdministratorAccess . He clicked  Attach . He ran the code again. Success.  The image appeared in the bucket. "Problem solved," Timothy said. Margaret walked in. "I saw the alert. Did you just attach  AdministratorAccess  to a production Lambda function?" "It was getting permissio...

  The Secret Life of Azure: Feature Flags and Controlled Releases # Azure # AppConfiguration # FeatureFlags # DevOps Releasing features safely with Azure App Configuration and Feature Flags. Resilience & Release The library was quiet, but Timothy was staring at a specific block of code on the chalkboard. He had a look of frustration that every developer knows well. "Margaret," he said, "the deployment slot swap worked perfectly. The new code is in Production. But I have a problem. There’s a new 'v2' of the search algorithm in this deployment, and I’m not ready for every user to hit it yet. I wanted to let our internal team test it in Prod first, but the moment I swapped the slots, it went live for everyone. Do I have to redeploy the whole app just to hide a block of code?" Margaret walked over, picked up a piece of white chalk, and drew a simple  if/else  block on the board. "Timothy, you're treating the code like it's permanent once it'...

  The Secret Life of JavaScript: The Batch # JavaScript # Coding # Programming # SoftwareDevelopment Why  yield  has a cost, and how to optimize your streams. Timothy sat back, satisfied. His Async Generator was humming. On his screen, 50,000 user records were streaming in from the API. The memory usage was low. The app felt responsive. He had successfully replaced the "Bucket" with the "Hose." "It's perfect," Timothy said. Margaret leaned over his shoulder. She watched the CPU monitor. The fan on Timothy’s laptop was spinning audibly. "It is  functional ," Margaret corrected. "But it is exhausting." "Exhausting?" Timothy pointed to the code. "But I'm streaming! I'm not blocking the main thread!" "You are streaming," Margaret agreed. "But you are moving a mountain of sand with a teaspoon." The Cost of a Handshake Margaret pulled up Timothy's generator code. // Timothy's "t...

  'AccessDeniedException' When AWS Under Real Load: Cross-Region Replication (CRR) Lag Under Heavy Object Churn in Amazon S3 # AWSUnderRealLoad # AmazonS3 # CrossRegionReplication # DistributedSystems A production-grade diagnostic and prevention guide for replication backlog, consistency gaps, and failover surprises caused by heavy write and delete activity in Amazon S3. Problem A multi-region architecture using S3 Cross-Region Replication (CRR) begins experiencing: Delayed object availability in the destination region Stale reads after failover Inconsistent object counts across regions Replication metrics lagging No obvious errors in source bucket PUT and DELETE requests return success. But replicated data is minutes — or longer — behind. The system appears healthy. The regions disagree. Clarifying the Issue Cross-Region Replication is asynchronous. Under normal conditions, replication delay is minimal. Under heavy object churn — meaning high-volume PUTs, overwrites, or DELETE...