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https://issues.apache.org/jira/browse/HIVE-22771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17043662#comment-17043662
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Shivam commented on HIVE-22771:
-------------------------------
Thanks Naveen.
Actually the issue arises when the generated idHash is alphanumeric
(exponential representation) then the regex used to generate the final location
"\\d\\.?\\d+" does not remove alphabets, and since the idHash is generated
using Math.random() the issue won't arise even without the fix most of the
times, only when Math.random() return a number in exponential notation would we
experience the issue.
> Partition location incorrectly formed in FileOutputCommitterContainer
> ---------------------------------------------------------------------
>
> Key: HIVE-22771
> URL: https://issues.apache.org/jira/browse/HIVE-22771
> Project: Hive
> Issue Type: Bug
> Components: HCatalog
> Affects Versions: 1.2.1
> Reporter: Shivam
> Assignee: Shivam
> Priority: Critical
> Labels: pull-request-available
> Attachments: HIVE-22771.2.patch, HIVE-22771.3.patch,
> HIVE-22771.4.patch, HIVE-22771.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Class _HCatOutputFormat_ in package _org.apache.hive.hcatalog.mapreduce_ uses
> function _setOutput_ to generate _idHash_ using below statement:
> *+In file org/apache/hive/hcatalog/mapreduce/HCatOutputFormat.java+*
> *line 116: idHash = String.valueOf(Math.random());*
> The output of idHash can be similar to values like this : 7.145347157239135E-4
>
> And, in class _FileOutputCommitterContainer_ in package
> _org.apache.hive.hcatalog.mapreduce;_
> Uses below statement to compute final partition path:
> +*In org/apache/hive/hcatalog/mapreduce/FileOutputCommitterContainer.java*+
> *line 366: String finalLocn = jobLocation.replaceAll(Path.SEPARATOR +
> SCRATCH_DIR_NAME + "{color:#ff0000}\\d
> .?
> d+"{color},"");*
> *line 367: partPath = new Path(finalLocn);*
>
> Regex used here is incorrect, since it will only remove integers after the
> *SCRATCH_DIR_NAME,* and hence will append 'E-4' (for the above example) in
> the final partition location.
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