[jira] [Assigned] (YARN-8164) Fix an Potential NPE

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

     [ https://issues.apache.org/jira/browse/YARN-8164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

lujie reassigned YARN-8164:
---------------------------

    Assignee: lujie

> Fix an Potential NPE 
> ---------------------
>
>                 Key: YARN-8164
>                 URL: https://issues.apache.org/jira/browse/YARN-8164
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 3.0.0-beta1
>            Reporter: lujie
>            Assignee: lujie
>            Priority: Major
>         Attachments: YARN-8146_1.patch
>
>
> We have developed a static analysis tool [NPEDetector|https://github.com/lujiefsi/NPEDetector] to find some potential NPE. Our analysis shows that some callees may return null in corner case(e.g. node crash , IO exception), some of their callers have  _!=null_ check but some do not have.
> Callee FairScheduler#getAppsInQueue can return null
> {code:java}
> public List<ApplicationAttemptId> getAppsInQueue(String queueName) {
>     FSQueue queue = queueMgr.getQueue(queueName);
>    if (queue == null) {
>       return null;//here
>   }
> }
> {code}
> it has 4 callers, three of them have null checker, one does not have. In this issue we post a patch which can add  !=null  based on existed !=null  check.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: yarn-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: yarn-issues-help@hadoop.apache.org