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https://issues.apache.org/jira/browse/ATLAS-1889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashutosh Mestry closed ATLAS-1889.
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> 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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