[STORM-2903] Fix possible NullPointerException in AbstractAutoCreds

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0, 1.x
• Fix Version/s: 2.0.0, 1.2.0
• Labels: pull-request-available
• Assignee: Manikumar
• Reporter: Manikumar
• Created: 19/Jan/18 17:10
• Updated: 01/Feb/18 14:12
• Resolved: 21/Jan/18 23:43

Description

Observed below exception while testing Hive token mechanism.

    ```
    Caused by: java.lang.NullPointerException
            at org.apache.storm.common.AbstractAutoCreds.addTokensToUGI(AbstractAutoCreds.java:219) ~[storm-autocreds-1.2.0.3.1.0.0-526.jar:1.2.0.3.1.0.0-526]
            at org.apache.storm.common.AbstractAutoCreds.populateSubject(AbstractAutoCreds.java:118) ~[storm-autocreds-1.2.0.3.1.0.0-526.jar:1.2.0.3.1.0.0-526]
            at org.apache.storm.security.auth.AuthUtils.populateSubject(AuthUtils.java:228) ~[storm-core-1.2.0.3.1.0.0-526.jar:1.2.0.3.1.0.0-526]
            ... 10 more
    2018-01-19 16:23:26.157 o.a.s.util main [ERROR] Halting process: ("Error on initialization")
    ```

Issue Links

• links to: GitHub Pull Request #2519
• links to: GitHub Pull Request #2520
• links to: GitHub Pull Request #2523
• links to: GitHub Pull Request #2524