[HADOOP-15382] Log kinit output in credential renewal thread

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.2.0
• Component/s: security
• Assignee: Gabor Bota
• Reporter: Wei-Chiu Chuang
• Created: 12/Apr/18 05:56
• Updated: 02/Oct/19 17:15
• Resolved: 03/May/18 18:46

Description

We currently run kinit command in a thread to renew kerberos credentials periodically. 

            Shell.execCommand(cmd, "-R");
            if (LOG.isDebugEnabled()) {
              LOG.debug("renewed ticket");
            }

It seems useful to log the output of the kinit too.