RunJar should provide more diags when it can't create a temp file
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Key: HADOOP-6614
URL: https://issues.apache.org/jira/browse/HADOOP-6614
Project: Hadoop Common
Issue Type: Improvement
Components: util
Affects Versions: 0.22.0
Reporter: Steve Loughran
Priority: Minor
When you see a stack trace about permissions, it is better if the trace
included the file/directory at fault:
{code}
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)
{code}
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.
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