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https://issues.apache.org/jira/browse/KNOX-3253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18060982#comment-18060982
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ASF subversion and git services commented on KNOX-3253:
-------------------------------------------------------

Commit 5961ac2cf8406b38cc7a5ecf828cd2425283aebd in knox's branch 
refs/heads/master from hanicz
[ https://gitbox.apache.org/repos/asf?p=knox.git;h=5961ac2cf ]

KNOX-3253: Add advisory lock to the postgres table creation to avoid catalog 
race condition when multiple Knox instance start up simultaneously (#1157)



> Improve DB table creation with locks
> ------------------------------------
>
>                 Key: KNOX-3253
>                 URL: https://issues.apache.org/jira/browse/KNOX-3253
>             Project: Apache Knox
>          Issue Type: Improvement
>          Components: Server
>    Affects Versions: 2.1.0
>            Reporter: Tamás Hanicz
>            Assignee: Tamás Hanicz
>            Priority: Major
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> This is an improvement on KNOX-3252 . Database table creation should be 
> improved with DB level locks to avoid exceptions due to race conditions.



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