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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-15964) LLAP: Llap IO codepath not getting invoked due to file column id mismatch
Date Thu, 23 Feb 2017 08:48:44 GMT

    [ https://issues.apache.org/jira/browse/HIVE-15964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15880125#comment-15880125
] 

Prasanth Jayachandran commented on HIVE-15964:
----------------------------------------------

One minor suggestion. These counters can be flaky when the test gets batched together with
other tests (hash aggregation, cache eviction etc.). To reduce the flakiness, 2 suggestions
1) set hive.map.aggr=false 
2) set the post hook only for the SELECT queries. Setting the hook at the top of the qtest
will print counters for all queries including INSERT queries which we are not really interested

otherwise looks good, +1

> LLAP: Llap IO codepath not getting invoked due to file column id mismatch
> -------------------------------------------------------------------------
>
>                 Key: HIVE-15964
>                 URL: https://issues.apache.org/jira/browse/HIVE-15964
>             Project: Hive
>          Issue Type: Bug
>          Components: llap
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Minor
>         Attachments: HIVE-15964.1.patch, HIVE-15964.2.patch, HIVE-15964.3.patch
>
>
> LLAP IO codepath is not getting invoked in certain cases when schema evolution checks
are done. Though "int --> long" (fileType to readerType) conversions are allowed, the file
type columns are not matched correctly when such conversions need to happen. 



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