[HADOOP-6804] allow FileSystem.copyFromLocalFile() to execute under specified username

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 0.20.2
• Component/s: util
• Assignee: Unassigned
• Reporter: Ted Yu
• Created: 02/Jun/10 23:20
• Updated: 30/Jul/14 19:56
• Resolved: 30/Jul/14 19:56

Description

When the user calling FileSystem.copyFromLocalFile() doesn't have permission to write to certain hdfs path:
Thread [main] (Suspended (exception AccessControlException))
DFSClient.mkdirs(String, FsPermission) line: 905
DistributedFileSystem.mkdirs(Path, FsPermission) line: 262
DistributedFileSystem(FileSystem).mkdirs(Path) line: 1162
FileUtil.copy(FileSystem, Path, FileSystem, Path, boolean, boolean, Configuration) line: 194
DistributedFileSystem(FileSystem).copyFromLocalFile(boolean, boolean, Path, Path) line: 1231
DistributedFileSystem(FileSystem).copyFromLocalFile(boolean, Path, Path) line: 1207
DistributedFileSystem(FileSystem).copyFromLocalFile(Path, Path) line: 1179
GridM2mInstallation.copyInputFiles(FlowConfigurations$FlowConf) line: 380

Passwordless ssh has been setup for current user, tyu, on localhost and user hadoop on hdfs

FileSystem.copyFromLocalFile() should be able to execute using a different username than effective user on localhost so that AccessControlException can be avoided.