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From "Ashutosh Mestry (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ATLAS-1889) Failure in simultaneous updates to an entity tag association
Date Wed, 21 Jun 2017 06:00:00 GMT

     [ https://issues.apache.org/jira/browse/ATLAS-1889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashutosh Mestry updated ATLAS-1889:
-----------------------------------
    Attachment: ATLAS-1889-Handling-multiple-entities.patch

> Failure in simultaneous updates to an entity tag association
> ------------------------------------------------------------
>
>                 Key: ATLAS-1889
>                 URL: https://issues.apache.org/jira/browse/ATLAS-1889
>             Project: Atlas
>          Issue Type: Bug
>          Components:  atlas-core
>    Affects Versions: 0.8-incubating
>            Reporter: Ashutosh Mestry
>            Assignee: Ashutosh Mestry
>             Fix For: trunk, 0.8.1-incubating
>
>         Attachments: ATLAS-1889-Handling-multiple-entities.patch
>
>
> *Background*
> When multiple requests simultaneously attempt to change the tags associated with an entity,
the current implementation might result in APIs returning fewer tags for the entity than is
actually associated.
> The problem thus causes UI not to behave correctly.
>  
> *Solution*
> Implements a synchronization mechanism.
>  
> Steps to duplicate the problem:
> * Create several tags. Eg. tag1, tag2, tag3, tag4.
> * Attach these tags to and entity say ‘testtable1’
> * Use the following CURL commands to delete the tags:
> {code}
> curl -X DELETE -u admin:admin 'http://localhost:21000/api/atlas/entities/a2d0b023-aafe-4ddd-bb90-65164af8796c/traits/tag1'
 -H 'Content-Type: application/json' &
> curl -X DELETE -u admin:admin 'http://localhost:21000/api/atlas/entities/a2d0b023-aafe-4ddd-bb90-65164af8796c/traits/tag2'
 -H 'Content-Type: application/json' &
> curl -X DELETE -u admin:admin 'http://localhost:21000/api/atlas/entities/a2d0b023-aafe-4ddd-bb90-65164af8796c/traits/tag3'
 -H 'Content-Type: application/json' &
> curl -X DELETE -u admin:admin 'http://localhost:21000/api/atlas/entities/a2d0b023-aafe-4ddd-bb90-65164af8796c/traits/tag4'
 -H 'Content-Type: application/json'
> {code}
> You will notice that entity _testtable1_ ends up with some tags not deleted.
> Additional querying with gremlin will show that the edges are deleted correctly.



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