> On June 2, 2017, 3:18 p.m., Na Li wrote:
> > sentry-provider/sentry-provider-db/src/main/java/org/apache/sentry/provider/db/service/persistent/SentryStore.java
> > Lines 2618 (patched)
> > <https://reviews.apache.org/r/59720/diff/2/?file=1739109#file1739109line2618>
> >
> >     do you want to delete all entries whose authzImgID <= imageID? 
> >     
> >     This may handle the case better where two threads are saving full 
> > images at the same time.
> 
> Sergio Pena wrote:
>     This looks good. It will also help to clean any left images previos to 
> imageID.

The new patch accepts only one image persisted, and only that one is removed.


- Sergio


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On June 7, 2017, 9:24 p.m., Sergio Pena wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/59720/
> -----------------------------------------------------------
> 
> (Updated June 7, 2017, 9:24 p.m.)
> 
> 
> Review request for sentry, Alexander Kolbasov, kalyan kumar kalvagadda, and 
> Vamsee Yarlagadda.
> 
> 
> Bugs: SENTRY-1781
>     https://issues.apache.org/jira/browse/SENTRY-1781
> 
> 
> Repository: sentry
> 
> 
> Description
> -------
> 
> This patch only adds an extra column to the MAuthzPathsMapping table that 
> contains an image identifier that will be used to detect full snapshots. This 
> patch does not increment the identifier yet, it only uses 0 for now.
> 
> TIPS for reviewers:
> 
> - package.jdo adds a new column name AUTHZ_IMG_ID to the AUTHZ_MAPS_MAPPING 
> table used to identify the paths that are part of a new hive snapshot.
> 
> - MAuthzPathsMapping.java adds the the new column and API to handle JDO 
> requests.
> 
> - SentryStore.java modifies all methods that interact with the snapshots. It 
> makes sure that
>   when persisting a new snapshot, then the authzImgID is incremented and the 
> old one is
>   deleted. Also it makes sure that retrieve/add/delete/rename/update uses the 
> current 
>   authzImgID whenver they're called.
> 
> - TestSentryStore.java adds unit tests to verify that all SentryStore API 
> work correctly
>   when a new hive snapshot is created.
> 
> 
> Diffs
> -----
> 
>   
> sentry-provider/sentry-provider-db/src/main/java/org/apache/sentry/provider/db/service/model/MAuthzPathsMapping.java
>  f51894bb7e109c37997e7134e07a82f46c0a3c44 
>   
> sentry-provider/sentry-provider-db/src/main/java/org/apache/sentry/provider/db/service/model/MHiveMetastoreImage.java
>  PRE-CREATION 
>   
> sentry-provider/sentry-provider-db/src/main/java/org/apache/sentry/provider/db/service/model/package.jdo
>  459939b7600e05d57c7e11eefe20c2591cac0b34 
>   
> sentry-provider/sentry-provider-db/src/main/java/org/apache/sentry/provider/db/service/persistent/SentryStore.java
>  37eb0b25e10ef69057599277aa5941ca05d52290 
>   
> sentry-provider/sentry-provider-db/src/test/java/org/apache/sentry/provider/db/service/persistent/TestSentryStore.java
>  788062c12ab4e4180adf2d4b4a191e9b5c616f87 
> 
> 
> Diff: https://reviews.apache.org/r/59720/diff/5/
> 
> 
> Testing
> -------
> 
> All unit tests run locally, but there are some flaky tests on Jenkins no 
> related to this patch.
> 
> 
> Thanks,
> 
> Sergio Pena
> 
>

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