[HADOOP-6614] RunJar should provide more diags when it can't create a temp file

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.22.0
• Fix Version/s: 0.23.1
• Component/s: util
• Hadoop Flags: Reviewed
• Assignee: Jonathan Hsieh
• Reporter: Steve Loughran
• Created: 04/Mar/10 17:02
• Updated: 05/Mar/12 02:48
• Resolved: 21/Nov/11 08:02

Description

When you see a stack trace about permissions, it is better if the trace included the file/directory at fault:

Exception in thread "main" java.io.IOException: Permission denied
	at java.io.UnixFileSystem.createFileExclusively(Native Method)
	at java.io.File.checkAndCreate(File.java:1704)
	at java.io.File.createTempFile(File.java:1792)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:147)

As it is, you need to go into the code, discover that it's ${hadoop.tmp.dir}/hadoop-unjar, but you need to know the value of hadoop.tmp.dir to really find out what the problem is.

Issue Links

• is related to: HADOOP-7843 compilation failing because workDir not initialized in RunJar.java