[jira] [Closed] (VELOCITY-966) RuntimeInstance.render throws null pointer exception when trying to render the same AST

     [ https://issues.apache.org/jira/browse/VELOCITY-966?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Claude Brisson closed VELOCITY-966.
-----------------------------------
    Resolution: Not A Bug

> RuntimeInstance.render throws null pointer exception when trying to render the same AST 
> ----------------------------------------------------------------------------------------
>
>                 Key: VELOCITY-966
>                 URL: https://issues.apache.org/jira/browse/VELOCITY-966
>             Project: Velocity
>          Issue Type: Bug
>    Affects Versions: 2.3
>            Reporter: Alex
>            Assignee: Claude Brisson
>            Priority: Major
>
> The objective is to use 
> *RuntimeInstance.parse* to get the parsed AST for some template and cache the AST.
> Then use *RuntimeInstance.render* multiple times to render the text.
>  
> It appears that in version 2.3 {*}RuntimeInstance.{*}{*}render{*} invokes the Node.init call and at the end of the rendering clears the parser and tokens. On the next attempt to render init fails with the NullPointerException because tokens have been cleared.{*}{*}
>  
> So you can not call *RuntimeInstance.render* on the same AST several times
> which seems to be the intent of this method...



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