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https://issues.apache.org/jira/browse/HIVE-17008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16076630#comment-16076630
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Mohit Sabharwal commented on HIVE-17008:
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{{ListenerEvent}} has the success flag, so listener implementation can choose
to ignore failed events. But {{DbNotificationListener}} and
{{HMSMetricsListener}} are ignoring the status flag. The old
{{NotificationListener}} though is looking at the flag and only logging
successful events.
This does look like something we should make consistent, not just address the
NPE. [~sushanth], [~thejas], [~akolb], do you have any thoughts ?
> HiveMetastore.drop_database can return NPE if database does not exist
> ---------------------------------------------------------------------
>
> Key: HIVE-17008
> URL: https://issues.apache.org/jira/browse/HIVE-17008
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Reporter: Dan Burkert
> Assignee: Dan Burkert
> Attachments: HIVE-17008.0.patch
>
>
> When dropping a non-existent database, the HMS will still fire registered
> {{DROP_DATABASE}} event listeners. This results in an NPE when the listeners
> attempt to deref the {{null}} database parameter.
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