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From "Rushabh S Shah (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15234) NPE when initializing KMSWebApp
Date Fri, 02 Mar 2018 22:14:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16384228#comment-16384228
] 

Rushabh S Shah commented on HADOOP-15234:
-----------------------------------------

We all can agree that {{keyProvider}} being null is a bad thing.
Instead of adding {{isExitSystem}} and deciding whether to rethrow or exit makes the code
little bit unreadable.
We can take a shortcut in this patch and skip the test.
We can just do a null check and throw {{IllegalStateException}} with the message.



> 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
>
>
> 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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