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From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-9699) org.apache.hadoop.fs.FileUtil#canRead and canWrite should return false on SecurityExceptions.
Date Wed, 03 Jul 2013 17:34:20 GMT
Mark Miller created HADOOP-9699:
-----------------------------------

             Summary: org.apache.hadoop.fs.FileUtil#canRead and canWrite should return false
on SecurityExceptions.
                 Key: HADOOP-9699
                 URL: https://issues.apache.org/jira/browse/HADOOP-9699
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Mark Miller
            Priority: Minor


Currently, if a security manager denies access on these calls, a SecurityException is thrown
rather than returning false.

This causes ugly behavior in MiniDFSCluster#createPermissionsDiagnosisString for example.
If you are running with a security manager, that method can hide root exceptions on you because
when it tries to create the permissions string, canRead and canWrite can throw security exceptions
- the original exception is lost, and the problem may not be permissions related at all (it
wasn't in the case that I ran into this).

Rather than hardening createPermissionsDiagnosisString, it seems like these methods should
just treat SecurityExceptions as lack of access.

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