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https://issues.apache.org/jira/browse/HADOOP-17372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17790284#comment-17790284
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Antonio Murgia commented on HADOOP-17372:
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Provided a PR with tests + doc as HADOOP-18993
> 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
> Assignee: Steve Loughran
> Priority: Major
> Fix For: 3.3.1
>
>
> 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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