java.lang.NullPointerException: java.lang.String.getBytes(String.java:811)

[Greg Lewis]

On Mon, Dec 18, 2006 at 08:58:14PM -0800, Nick Johnson wrote:
> Just a guess, but there's a version of getBytes that takes a character set 
> name as an argument, which would probably throw a NullPointerException in 
> the event that the argument you passsed it was a null string.
> 
> Take a look at 
> http://java.sun.com/j2se/1.4.2/docs/api/java/lang/String.html#getBytes(java.lang.String) 
> and see if there's a chance that your HttpServletWrapper line 346 could be 
> passing null for the character set name.

Even better, look at String.java, line 811 (per the stack trace):

       if (charsetName == null) throw new NullPointerException();

Makes it pretty clear :)

>    Nick
> 
> On Mon, 18 Dec 2006, Marc G. Fournier wrote:
> 
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> > 
> > 
> > Hate to ask when I don't believe I have near enough information, but my 
> > knowledge o Java is so small that I don't even know where to begin debugging ...
> > 
> > Have a client running an application, that, when run on an older FreeBSD 4.x 
> > machine, with jdk from ports, ran great ...
> > 
> > Recently, upgraded them to FreeBSD 6.x, with Diablo, and from a 32bit server to 
> > a 64bit server, and now whenever they submit certain forms on the site, it 
> > generates the following error:
> > 
> > java.lang.NullPointerException
> > 	java.lang.String.getBytes(String.java:811)
> > 	org.dataisland.wrapper.servlet.HttpServletWrapper.streamDocument(HttpServletWrapper.java:346)
> > 	org.dataisland.wrapper.servlet.HttpServletWrapper.serveDataIsland(HttpServletWrapper.java:316)
> > 	org.dataisland.wrapper.servlet.HttpServletWrapper.service(HttpServletWrapper.java:277)
> > 	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> > 	org.opencommerce.iface.servlet.filter.Secure.doFilter(Secure.java:64)
> > 
> > The site *appears* to work fine otherwise ... its an e-commerce site, and I can 
> > add products to my shopping cart, search the database, etc ... but, for 
> > instance, if I try to update my profile, or they try and update prices, the 
> > above happens ...
> > 
> > Can someone suggest what, if anything, I can do to debug this a bit more 
> > intelligently?
> > 
> > Thanks ..
> > 
> > 
> > - ----
> > Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
> > Email . scrappy at hub.org                              MSN . scrappy at hub.org
> > Yahoo . yscrappy               Skype: hub.org        ICQ . 7615664
> > -----BEGIN PGP SIGNATURE-----
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> > CSsBMrwm9y9o4qJiIKPy+A==
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> > 
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> > 
> 
> -- 
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-- 
Greg Lewis                          Email   : glewis at eyesbeyond.com
Eyes Beyond                         Web     : http://www.eyesbeyond.com
Information Technology              FreeBSD : glewis at FreeBSD.org