[MYFACES-1740] NullPointer exception in ErrorPageWriter

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.1.6
• Fix Version/s: 1.1.6
• Environment: Oracle Application Server 10.1.3.1; Myfaces 1.1.6 + Tomahawk + Ajax4JSF (also happens without the AJAX library); Java 5; In a Suse 9 Box
• Assignee: Leonardo Uribe
• Reporter: Ricardo Ramírez
• Created: 06/Oct/07 17:32
• Updated: 12/Aug/08 21:03
• Resolved: 03/Jul/08 21:54

Description

Since I updated to 1.1.6, my error log has a lot of these:

java.lang.NullPointerException:
javax.faces.webapp._ErrorPageWriter.isText(_ErrorPageWriter.java:344)
javax.faces.webapp._ErrorPageWriter.writeComponent(_ErrorPageWriter.java:220)
javax.faces.webapp._ErrorPageWriter.debugHtml(_ErrorPageWriter.java:143)
javax.faces.webapp._ErrorPageWriter.handleException(_ErrorPageWriter.java:359)
javax.faces.webapp.FacesServlet.handleLifecycleException(FacesServlet.java:182)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:145)
com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:64)

I'm sorry, I've tried reproduced the problem, but I can't. In my single-machine installation, it works fine. Once I load it in the productions servers, with 100+ concurrent users, I start getting this issue. The application itself works fine, and the users haven't reported an unavailable service, but i get like 20 or so of this exceptions daily.

Any chance that at line 344 of ErrorPageWriter:

return (c.getClass().getName().startsWith("com.sun.facelets.compiler"));

would be changed to:

return c != null && (c.getClass().getName().startsWith("com.sun.facelets.compiler"));