Steve Loughran created HADOOP-17372:
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Summary: S3A AWS Credential provider loading gets confused with
isolated classloaders
Key: HADOOP-17372
URL: https://issues.apache.org/jira/browse/HADOOP-17372
Project: Hadoop Common
Issue Type: Sub-task
Components: fs/s3
Affects Versions: 3.4.0
Reporter: Steve Loughran
Problem: exception in loading S3A credentials for an FS, "Class class
com.amazonaws.auth.EnvironmentVariableCredentialsProvider does not implement
AWSCredentialsProvider"
Location: S3A + Spark dataframes test
Hypothesised cause:
Configuration.getClasses() uses the context classloader, and with the spark
isolated CL that's different from the one the s3a FS uses, so it can't load AWS
credential providers.
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