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https://issues.apache.org/jira/browse/HADOOP-15149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16306806#comment-16306806
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Steve Loughran commented on HADOOP-15149:
-----------------------------------------
Moot as the patch is in, but it'd have been cleaner for the asserts to have
been one in a assertCapability(key, StreamCapabilities subject, bool outcome)
and had it throw meaningful exceptions on a failure
> CryptoOutputStream should implement StreamCapabilities
> ------------------------------------------------------
>
> Key: HADOOP-15149
> URL: https://issues.apache.org/jira/browse/HADOOP-15149
> Project: Hadoop Common
> Issue Type: Task
> Components: fs
> Affects Versions: 3.0.0
> Reporter: Mike Drob
> Assignee: Xiao Chen
> Fix For: 3.1.0, 2.10.0, 2.9.1, 3.0.1
>
> Attachments: HADOOP-15149.01.patch
>
>
> Running some tests with HBase on HDFS with encryption, we noticed that
> CryptoOutputStream doesn't implement StreamCapabilities.
> Specifically, we have a HdfsDataOutputStream wrapping a CryptoOutputStream.
> The calls to {{hasCapability}} on the HDOS will always return false, even
> though the COS could be wrapping something that supports it, as evidenced by
> the implementation of hsync and hflush here.
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