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https://issues.apache.org/jira/browse/HIVE-1778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12968834#action_12968834
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Edward Capriolo commented on HIVE-1778:
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Joydeep,
Do you want to use SecureRandom or possibly use an internal static counter for
these ids?
> simultaneously launched queries collide on hive intermediate directories
> ------------------------------------------------------------------------
>
> Key: HIVE-1778
> URL: https://issues.apache.org/jira/browse/HIVE-1778
> Project: Hive
> Issue Type: Bug
> Reporter: Joydeep Sen Sarma
> Assignee: Edward Capriolo
>
> we saw one instance of multiple queries for the same user launched in
> parallel (from a workflow engine) use the same intermediate directories.
> which is obviously super bad but not suprising considering how we allocate
> them:
> Random rand = new Random();
> String executionId = "hive_" + format.format(new Date()) + "_" +
> Math.abs(rand.nextLong());
> Java documentation says: Two Random objects created within the same
> millisecond will have the same sequence of random numbers.
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