[
https://issues.apache.org/jira/browse/HIVE-25615?focusedWorklogId=698154&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-698154
]
ASF GitHub Bot logged work on HIVE-25615:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Dec/21 00:03
Start Date: 18/Dec/21 00:03
Worklog Time Spent: 10m
Work Description: Jack1007 commented on pull request #2723:
URL: https://github.com/apache/hive/pull/2723#issuecomment-997099398
@abstractdog Could you please review this PR ?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
Issue Time Tracking
-------------------
Worklog Id: (was: 698154)
Time Spent: 20m (was: 10m)
> Hive on tez will generate at least one MapContainer per 0 length file
> ---------------------------------------------------------------------
>
> Key: HIVE-25615
> URL: https://issues.apache.org/jira/browse/HIVE-25615
> Project: Hive
> Issue Type: Bug
> Components: Query Planning, Query Processor, Tez
> Affects Versions: 3.1.2
> Environment: hive-3.1.2
> tez-0.10.1
> Reporter: JackYan
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> When tez read a table with many partitions and those partitions contain 0
> length file only, ColumnarSplitSizeEstimator will return Integer.MAX_VALUE
> bytes length for every 0 length file.Then,TezSplitGrouper will treat those
> files as big files,and generate at least one MapContainer per 0 file to
> handle it.This is incorrect and even wasteful.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
