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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/03/10 09:46:00 UTC
[jira] [Updated] (HIVE-24866) FileNotFoundException during alter
table concat
[ https://issues.apache.org/jira/browse/HIVE-24866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HIVE-24866:
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Labels: pull-request-available (was: )
> FileNotFoundException during alter table concat
> -----------------------------------------------
>
> Key: HIVE-24866
> URL: https://issues.apache.org/jira/browse/HIVE-24866
> Project: Hive
> Issue Type: Bug
> Affects Versions: 2.4.0, 3.2.0, 4.0.0
> Reporter: Prasanth Jayachandran
> Assignee: Prasanth Jayachandran
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Because of the way combinefile IF groups files based on node and rack locality, there are cases where single big orc file gets spread across 2 or more combine hive split. When first task completes, as part of jobCloseOp the source orc file of concatenation is moved/renamed which can lead to FileNotFoundException in subsequent mappers that has partial split of that file.
> A simple fix would be for the mapper with start of the split to own the entire orc file for concatenation. If a mapper gets partial split which is not the start then it can skip the entire file.
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