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From Łukasz Hanusiak (JIRA) <j...@apache.org>
Subject [jira] [Commented] (PIVOT-927) Unexpected NPE
Date Wed, 30 Oct 2013 05:49:26 GMT

    [ https://issues.apache.org/jira/browse/PIVOT-927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13808776#comment-13808776
] 

Łukasz Hanusiak commented on PIVOT-927:
---------------------------------------

Roger I will be glad to help. If you can provide me with compiled version of changes that
you made I will deploy it into my local Artifactory and test it against my application.

> Unexpected NPE
> --------------
>
>                 Key: PIVOT-927
>                 URL: https://issues.apache.org/jira/browse/PIVOT-927
>             Project: Pivot
>          Issue Type: Question
>    Affects Versions: 2.0.3
>            Reporter: Łukasz Hanusiak
>            Assignee: Roger Whitcomb
>             Fix For: 2.0.4, 2.1
>
>
> After upgrading to pivot 2.0.3 my application randomly becomes unresponsive after throwing
NPE with following trace:
>  java.lang.NullPointerException
>      at org.apache.pivot.wtk.ApplicationContext$DisplayHost.processMouseMotionEvent(ApplicationContext.java:1132)

>      at java.awt.Component.processEvent(Unknown Source)
>      at org.apache.pivot.wtk.ApplicationContext$DisplayHost.processEvent(ApplicationContext.java:793)

>      at java.awt.Component.dispatchEventImpl(Unknown Source)
>      at java.awt.Component.dispatchEvent(Unknown Source)
>      at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
>      at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
>      at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
>      at java.awt.Container.dispatchEventImpl(Unknown Source)
>      at java.awt.Window.dispatchEventImpl(Unknown Source)
>      at java.awt.Component.dispatchEvent(Unknown Source)
>      at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
>      at java.awt.EventQueue.access$400(Unknown Source)
>      at java.awt.EventQueue$2.run(Unknown Source)
>      at java.awt.EventQueue$2.run(Unknown Source)
>      at java.security.AccessController.doPrivileged(Native Method)
>      at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
>      at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
>      at java.awt.EventQueue$3.run(Unknown Source)
>      at java.awt.EventQueue$3.run(Unknown Source)
>      at java.security.AccessController.doPrivileged(Native Method)
>      at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
>      at java.awt.EventQueue.dispatchEvent(Unknown Source)
>      at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
>      at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
>      at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
>      at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>      at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
>      at java.awt.EventDispatchThread.run(Unknown Source)
> After mentioned exception occurs user is unable to use any element of UI. Only application
restart helps solve this problem. Even more confusing is fact that problem sometimes occurs
after few minutes and sometimes after few hours or even days. 
> Can anybody give me some pointers how to workaround / fix this situation?



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