[jira] [Assigned] (HIVE-17737) ObjectStore.getNotificationEventsCount may cause NPE

["Prasad Nagaraj Subramanya (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-17737?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Prasad Nagaraj Subramanya reassigned HIVE-17737:
------------------------------------------------

    Assignee: Prasad Nagaraj Subramanya

> ObjectStore.getNotificationEventsCount may cause NPE
> ----------------------------------------------------
>
>                 Key: HIVE-17737
>                 URL: https://issues.apache.org/jira/browse/HIVE-17737
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 2.3.0, 3.0.0
>            Reporter: Alexander Kolbasov
>            Assignee: Prasad Nagaraj Subramanya
>
> In ObjectStore.getNotificationEventsCount():
> {code}
>  public NotificationEventsCountResponse getNotificationEventsCount(NotificationEventsCountRequest rqst) {
>     Long result = 0L;
>     try {
>       openTransaction();
>       long fromEventId = rqst.getFromEventId();
>       String inputDbName = rqst.getDbName();
>       String queryStr = "select count(eventId) from " + MNotificationLog.class.getName()
>                 + " where eventId > fromEventId && dbName == inputDbName";
>       query = pm.newQuery(queryStr);
>       query.declareParameters("java.lang.Long fromEventId, java.lang.String inputDbName");
>       result = (Long) query.execute(fromEventId, inputDbName); // <- Here
>       commited = commitTransaction();
>       return new NotificationEventsCountResponse(result.longValue());
>     }
>   }
> {code}
> It is possible that query.execute will return null in which case rsult.longValue() may throw NPE.



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