Hadoop - Modern Data Architecture with Hadoop
You tried migrating a Hadoop job to AWS EMR but got an error:
AccessDeniedException. What is the most likely cause?You tried migrating a Hadoop job to AWS EMR but got an error: AccessDeniedException. What is the most likely cause?
medium📝 Debug Q14 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze the error type AccessDeniedException
This error usually means permission issues, especially with AWS IAM roles.Step 2: Identify common permission problems in EMR migration
AccessDeniedException often occurs if the EMR cluster's IAM role cannot read the S3 bucket containing job files.Final Answer:
The IAM role lacks permissions to access S3 bucket -> Option BQuick Check:
AccessDenied = permission issue [OK]
Quick Trick: AccessDenied usually means permission problem [OK]
Common Mistakes:
- Blaming corrupted jar without checking permissions
- Assuming cluster state causes access errors
- Ignoring IAM role permissions
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