[ https://issues.apache.org/jira/browse/DRILL-4990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Pritesh Maker updated DRILL-4990: --------------------------------- Fix Version/s: (was: 1.9.0) > Use new HDFS API access instead of listStatus to check if users have > permissions to access workspace. > ----------------------------------------------------------------------------------------------------- > > Key: DRILL-4990 > URL: https://issues.apache.org/jira/browse/DRILL-4990 > Project: Apache Drill > Issue Type: Bug > Components: Query Planning & Optimization > Affects Versions: 1.8.0 > Reporter: Padma Penumarthy > Assignee: Padma Penumarthy > > For every query, we build the schema tree > (runSQL->getPlan->getNewDefaultSchema->getRootSchema). All workspaces in all > storage plugins are checked and are added to the schema tree if they are > accessible by the user who initiated the query. For file system plugin, > listStatus API is used to check if the workspace is accessible or not > (WorkspaceSchemaFactory.accessible) by the user. The idea seem to be if the > user does not have access to file(s) in the workspace, listStatus will > generate an exception and we return false. But, listStatus (which lists all > the entries of a directory) is an expensive operation when there are large > number of files in the directory. A new API is added in Hadoop 2.6 called > access (HDFS-6570) which provides the ability to check if the user has > permissions on a file/directory. Use this new API instead of listStatus. -- This message was sent by Atlassian JIRA (v6.4.14#64029)