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https://issues.apache.org/jira/browse/HADOOP-13461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15412575#comment-15412575
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Lei (Eddy) Xu commented on HADOOP-13461:
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[~xiaochen] Done.
> NPE in KeyProvider.rollNewVersion
> ---------------------------------
>
> Key: HADOOP-13461
> URL: https://issues.apache.org/jira/browse/HADOOP-13461
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.7.2
> Reporter: Colm O hEigeartaigh
> Priority: Minor
> Fix For: 2.8.0, 2.7.3, 2.6.5, 3.0.0-alpha1
>
> Attachments: HADOOP-13461.patch
>
>
> When KeyProvider.rollNewVersion(String name) is called, it first gets the
> metadata for the given name. The javadoc states that the getMetadata(String
> name) method can return null if the key doesn't exist. However rollNewVersion
> throws a NPE if the returned metadata is null.
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