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https://issues.apache.org/jira/browse/HIVE-13966?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15348861#comment-15348861
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Rahul Sharma edited comment on HIVE-13966 at 6/24/16 11:25 PM:
---------------------------------------------------------------
Repost: Can a listener be registered with multiple properties, for ex: can
DBNotification listener be part of
<name>hive.metastore.synchronous.event.listeners</name>(proposed above) and
<name>hive.metastore.event.listeners</name>. Should this be a check from the
code to prevent duplicated entries in the notification log or this be checked
by the user ?
was (Author: rahul9269):
Repost: Can a listener be registered with multiple properties, for ex: can
DBNotification listener be part of
<name>hive.metastore.synchronous.event.listeners</name>(proposed above) and
<name>hive.metastore.event.listeners</name>. Should this be a check from the
code to prevent duplicated entries in the notification log or this be checked
by the user/CM ?
> DbNotificationListener: can loose DDL operation notifications
> -------------------------------------------------------------
>
> Key: HIVE-13966
> URL: https://issues.apache.org/jira/browse/HIVE-13966
> Project: Hive
> Issue Type: Bug
> Components: HCatalog
> Reporter: Nachiket Vaidya
> Assignee: Rahul Sharma
> Priority: Critical
>
> The code for each API in HiveMetaStore.java is like this:
> 1. openTransaction()
> 2. -- operation--
> 3. commit() or rollback() based on result of the operation.
> 4. add entry to notification log (unconditionally)
> If the operation is failed (in step 2), we still add entry to notification
> log. Found this issue in testing.
> It is still ok as this is the case of false positive.
> If the operation is successful and adding to notification log failed, the
> user will get an MetaException. It will not rollback the operation, as it is
> already committed. We need to handle this case so that we will not have false
> negatives.
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