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https://issues.apache.org/jira/browse/HADOOP-17255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17201920#comment-17201920
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Akira Ajisaka commented on HADOOP-17255:
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bq. It wouldn't work if the keystore is in a HDFS encryption zone (it would end
up in a recursive loop). Storing key store in unencrypted HDFS could in theory
work, but transmitting unencrypted key store compromises security.
Yes. Thank you for your explanation.
Note:
* I understand there are very few (or no) people using Hadoop KMS and the
keystore is in unencrypted HDFS.
* Therefore it may not work even if this PR is merged.
* I'll use Ranger KMS instead because CDP/EMR recommend using it.
* Probably there are many users, so the quality of Ranger KMS is better than
that of Hadoop KMS.
> JavaKeyStoreProvider fails to create a new key if the keystore is HDFS
> ----------------------------------------------------------------------
>
> Key: HADOOP-17255
> URL: https://issues.apache.org/jira/browse/HADOOP-17255
> Project: Hadoop Common
> Issue Type: Bug
> Components: kms
> Reporter: Akira Ajisaka
> Assignee: Akira Ajisaka
> Priority: Critical
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The caller of JavaKeyStoreProvider#renameOrFail assumes that it throws
> FileNotFoundException if the src does not exist. However,
> JavaKeyStoreProvider#renameOrFail calls the old rename API. In
> DistributedFileSystem, the old API returns false if the src does not exist.
> That way JavaKeyStoreProvider fails to create a new key if the keystore is
> HDFS.
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