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Posted to issues-all@impala.apache.org by "Dinesh Garg (JIRA)" <ji...@apache.org> on 2019/06/27 05:46:00 UTC
[jira] [Updated] (IMPALA-8663) FileMetadataLoader should skip
listing files in hidden and tmp directories
[ https://issues.apache.org/jira/browse/IMPALA-8663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dinesh Garg updated IMPALA-8663:
--------------------------------
Labels: impala-acid (was: )
> FileMetadataLoader should skip listing files in hidden and tmp directories
> --------------------------------------------------------------------------
>
> Key: IMPALA-8663
> URL: https://issues.apache.org/jira/browse/IMPALA-8663
> Project: IMPALA
> Issue Type: Bug
> Reporter: Vihang Karajgaonkar
> Assignee: Vihang Karajgaonkar
> Priority: Major
> Labels: impala-acid
>
> Currently, the file metadata loader recursively lists the table and partition directories to get the fileStatuses. For each filestatus we ignore the hidden files in {{FileSystemUtil.isValidDataFile}}(). However that is not sufficient. For instance, if Hive is inserting data into a table when the refresh is called, it is possible the staging directory is present within the table directory. This staging directory is a hidden directory of the naming {{.hive-staging_*}}. It is possible that this directory has files which are not hidden (starting from a . or _). Such files should be considered temporary files and should not be considered as valid data files.
>
> Another instance where we see this happen is in transactional tables which has a {{.manifest}} which is located in a {{_tmp}} directory within the table directory. This file should also be skipped and not considered as a valid data file.
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