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From "Sushanth Sowmyan (JIRA)" <>
Subject [jira] [Commented] (HIVE-13966) DbNotificationListener: can loose DDL operation notifications
Date Mon, 01 Aug 2016 17:59:20 GMT


Sushanth Sowmyan commented on HIVE-13966:

Sorry for the late response, I've been tied on a bunch of other issues off late. I will look
at this and review in the next couple of days. This is an issue that is important to fix,
and I'm glad you have a patch up for it. :)

> DbNotificationListener: can loose DDL operation notifications
> -------------------------------------------------------------
>                 Key: HIVE-13966
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>          Components: HCatalog
>            Reporter: Nachiket Vaidya
>            Assignee: Rahul Sharma
>            Priority: Critical
>         Attachments: HIVE-13966.1.patch, HIVE-13966.2.patch
> The code for each API in 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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