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https://issues.apache.org/struts/browse/WW-2406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=42944#action_42944
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Dave Newton commented on WW-2406:
---------------------------------
(1) If it works, then it can't be a major bug.
(2) Depending on how you've set up your action and mapping, it's probable it
isn't a bug anyway, if your action is inside a tile and attempting to return
something other than JSP, which it is.
If you write to the response stream after something called getOutputStream this
is what happens.
> Error
> ------
>
> Key: WW-2406
> URL: https://issues.apache.org/struts/browse/WW-2406
> Project: Struts 2
> Issue Type: Bug
> Components: Core Actions, Integration, Plugin - Tiles
> Affects Versions: 2.0.9, 2.0.11
> Environment: Struts2 , Jboss 4.05, Windows, Java 5
> Reporter: RAUL
>
>
> this.getServletResponse().setContentType(document.getMimeType());
>
>
> this.getServletResponse().setHeader("Content-Disposition",("attachment;filename=\""
> +document.getFileName()+"\""));
> int longitud = document.getInstance().length;
>
>
> this.getServletResponse().setContentLength(longitud);
>
> OutputStream ouputStream =
> this.getServletResponse().getOutputStream();
> ouputStream.write(document.getInstance());
> ouputStream.flush();
> ouputStream.close();
> it shows the following error in the log. but if it works
> 12:15:59,546 INFO [STDOUT] 12:15:59,546 ERROR [BasicTilesContainer] Error
> rendering tile
> java.io.IOException: Error including path '/jspinclude/layout.jsp'.
> getOutputStream() has already been called for this response
> at
> org.apache.tiles.servlet.context.ServletTilesRequestContext.include(ServletTilesRequestContext.java:214)
> at
> org.apache.tiles.servlet.context.ServletTilesRequestContext.dispatch(ServletTilesRequestContext.java:183)
> at
> org.apache.tiles.context.TilesRequestContextWrapper.dispatch(TilesRequestContextWrapper.java:72)
> at
> org.apache.struts2.tiles.StrutsTilesRequestContext.dispatch(StrutsTilesRequestContext.java:86)
> at
> org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:417)
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