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https://issues.apache.org/jira/browse/HADOOP-12699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15127351#comment-15127351
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Wei-Chiu Chuang commented on HADOOP-12699:
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The NPE is unrelated to Hadoop at all. It's in Apache MINA.
> TestKMS#testKMSProvider intermittently fails during 'test rollover draining'
> ----------------------------------------------------------------------------
>
> Key: HADOOP-12699
> URL: https://issues.apache.org/jira/browse/HADOOP-12699
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Xiao Chen
> Assignee: Xiao Chen
> Attachments: HADOOP-12699.01.patch, HADOOP-12699.02.patch,
> HADOOP-12699.03.patch, HADOOP-12699.04.patch, HADOOP-12699.06.patch,
> HADOOP-12699.07.patch, HADOOP-12699.08.patch, HADOOP-12699.repro.2,
> HADOOP-12699.repro.patch
>
>
> I've seen several failures of testKMSProvider, all failed in the following
> snippet:
> {code}
> // test rollover draining
> KeyProviderCryptoExtension kpce = KeyProviderCryptoExtension.
> createKeyProviderCryptoExtension(kp);
> .....
> EncryptedKeyVersion ekv1 = kpce.generateEncryptedKey("k6");
> kpce.rollNewVersion("k6");
> EncryptedKeyVersion ekv2 = kpce.generateEncryptedKey("k6");
> Assert.assertNotEquals(ekv1.getEncryptionKeyVersionName(),
> ekv2.getEncryptionKeyVersionName());
> {code}
> with error message
> {quote}Values should be different. Actual: k6@0{quote}
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