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https://issues.apache.org/jira/browse/HADOOP-15234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16395431#comment-16395431
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Xiaoyu Yao commented on HADOOP-15234:
-------------------------------------
{quote}IMO it is too much spoon feeding to administrators. We just have 3-4
schemes and it shouldn't be too difficult to figure out the right scheme.
{quote}
[~shahrs87] , good point. I'm OK with the current approach.
[~zhenyi] , can you add a simple test case with an invalid KMS URI like the
empty one mentioned in the description and verify the exception is thrown and
no NPE.
> NPE when initializing KMSWebApp
> -------------------------------
>
> Key: HADOOP-15234
> URL: https://issues.apache.org/jira/browse/HADOOP-15234
> Project: Hadoop Common
> Issue Type: Bug
> Components: kms
> Reporter: Xiao Chen
> Assignee: fang zhenyi
> Priority: Major
> Attachments: HADOOP-15234.001.patch, HADOOP-15234.002.patch,
> HADOOP-15234.003.patch, HADOOP-15234.004.patch
>
>
> During KMS startup, if the {{keyProvider}} is null, it will NPE inside
> KeyProviderExtension.
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.hadoop.crypto.key.KeyProviderExtension.<init>(KeyProviderExtension.java:43)
> at
> org.apache.hadoop.crypto.key.CachingKeyProvider.<init>(CachingKeyProvider.java:93)
> at
> org.apache.hadoop.crypto.key.kms.server.KMSWebApp.contextInitialized(KMSWebApp.java:170)
> {noformat}
> We're investigating the exact scenario that could lead to this, but the NPE
> and log around it can be improved.
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