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https://issues.apache.org/jira/browse/HIVE-5454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13801981#comment-13801981
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Phabricator commented on HIVE-5454:
-----------------------------------
brock has commented on the revision "HIVE-5454 [jira] HCatalog runs a partition
listing with an empty filter".
+1
REVISION DETAIL
https://reviews.facebook.net/D13317
To: JIRA, QwertyManiac
Cc: brock
> HCatalog runs a partition listing with an empty filter
> ------------------------------------------------------
>
> Key: HIVE-5454
> URL: https://issues.apache.org/jira/browse/HIVE-5454
> Project: Hive
> Issue Type: Bug
> Components: HCatalog
> Affects Versions: 0.12.0
> Reporter: Harsh J
> Attachments: D13317.1.patch, D13317.2.patch, D13317.3.patch
>
>
> This is a HCATALOG-527 caused regression, wherein the HCatLoader's way of
> calling HCatInputFormat causes it to do 2x partition lookups - once without
> the filter, and then again with the filter.
> For tables with large number partitions (100000, say), the non-filter lookup
> proves fatal both to the client ("Read timed out" errors from
> ThriftMetaStoreClient cause the server doesn't respond) and to the server
> (too much data loaded into the cache, OOME, or slowdown).
> The fix would be to use a single call that also passes a partition filter
> information, as was in the case of HCatalog 0.4 sources before HCATALOG-527.
> (HCatalog-release-wise, this affects all 0.5.x users)
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