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https://issues.apache.org/jira/browse/HADOOP-16722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16979162#comment-16979162
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Steve Loughran commented on HADOOP-16722:
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Got a stack trace? Just so we know where to begin
> S3GuardTool to support FilterFileSystem
> ---------------------------------------
>
> Key: HADOOP-16722
> URL: https://issues.apache.org/jira/browse/HADOOP-16722
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs/s3
> Reporter: Mingliang Liu
> Priority: Major
>
> Currently S3GuardTool is operating against a S3AFileSystem implementation.
> There are cases where the {{fs.hboss.fs.s3a.impl}} is a FilterFileSystem
> wrapping another implementation. For example, [[HBASE-23314]] made
> {{HBaseObjectStoreSemantics}} a {{FilterFileSystem}} from {{FileSystem}}.
> S3GuardTool could use {{FilterFileSystem::getRawFileSystem}} method to get
> the wrapped S3AFileSystem implementation. Without this support, a simple
> S3GuardTool against HBOSS will get confusing error like "s3a://mybucket is
> not a S3A file system".
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