[jira] [Created] (HADOOP-10505) LinuxContainerExecutor is incompatible with Simple Security mode.

["jay vyas (JIRA)" <ji...@apache.org>]

jay vyas created HADOOP-10505:
---------------------------------

             Summary: LinuxContainerExecutor is incompatible with Simple Security mode.
                 Key: HADOOP-10505
                 URL: https://issues.apache.org/jira/browse/HADOOP-10505
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: jay vyas


As of hadoop 2.3.0, commit cc74a18c makes it so that nonsecureLocalUser replaces the user who submits a job if security is disabled: 

{noformat}
 return UserGroupInformation.isSecurityEnabled() ? user : nonsecureLocalUser;
{noformat}

However, the only way to enable security, is to NOT use SIMPLE authentication mode:

{noformat}
  public static boolean isSecurityEnabled() {
    return !isAuthenticationMethodEnabled(AuthenticationMethod.SIMPLE);
  }
{noformat}
 
Thus, the framework ENFORCES that "SIMPLE" login security --> nonSecureuser for submission of LinuxExecutorContainer.

This results in a confusing issue, wherein we submit a job as "sally" and then get an exception that user "nobody" is not whitelisted and has UID < MAX_ID.

My proposed solution is that we should be able to leverage LinuxContainerExector regardless of hadoop's view of the security settings on the cluster, i.e. decouple LinuxContainerExecutor logic from the "isSecurityEnabled" return value.



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