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https://issues.apache.org/jira/browse/HDFS-7067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14277442#comment-14277442
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Colin Patrick McCabe commented on HDFS-7067:
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Charles, is the TestKeyProviderFactory failure due to this patch?
> ClassCastException while using a key created by keytool to create encryption
> zone.
> -----------------------------------------------------------------------------------
>
> Key: HDFS-7067
> URL: https://issues.apache.org/jira/browse/HDFS-7067
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: encryption
> Affects Versions: 2.6.0
> Reporter: Yi Yao
> Assignee: Charles Lamb
> Priority: Minor
> Attachments: HDFS-7067.001.patch, HDFS-7067.002.patch,
> hdfs7067.keystore
>
>
> I'm using transparent encryption. If I create a key for KMS keystore via
> keytool and use the key to create an encryption zone. I get a
> ClassCastException rather than an exception with decent error message. I know
> we should use 'hadoop key create' to create a key. It's better to provide an
> decent error message to remind user to use the right way to create a KMS key.
> [LOG]
> ERROR[user=hdfs] Method:'GET' Exception:'java.lang.ClassCastException:
> javax.crypto.spec.SecretKeySpec cannot be cast to
> org.apache.hadoop.crypto.key.JavaKeyStoreProvider$KeyMetadata'
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