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2 Errors on AS/400

Michael Rosenthal
Greenhorn

Joined: Nov 17, 2003
Posts: 27
All,

I have built a website that has been implemented on AS/400 running on WebSphere 5.0. In the SystemOut.log I am continually seeing the following 2 errors. Does anyone know what these are and how I can fix them so that they stop showing up in the logs.



Sun Certified Java2 Programmer - 1.4 - SCJP<br />Sun Certified Web Component Developer for J2EE Platform - SCWCD
Warren Dew
blacksmith
Ranch Hand

Joined: Mar 04, 2004
Posts: 1332
    
    2
Hm ... all IBM and Sun code there. Have you reported it to them?
Michael Rosenthal
Greenhorn

Joined: Nov 17, 2003
Posts: 27
I have not yet reported these problems to either Sun or IBM. I wanted to see if anyone had run into anything similar first. Since it is not any of our custom application code it has been difficult to debug.
Warren Dew
blacksmith
Ranch Hand

Joined: Mar 04, 2004
Posts: 1332
    
    2
A little googling identified that the PROPFIND method referred to in the first exception is a nonstandard extension to HTTP that started being used for a worm/trojan starting around 2002. My guess is someone is trying to insert a trojan into your system by exploiting a buffer overflow bug in Microsoft IIS - but fortunately you're not running IIS, so you're not vulnerable. (They're probably not attacking your machine specifically, but rather just scanning the net and attacking any vulnerable machines.)

I don't know why WebSphere is throwing an exception instead of just logging the bad request. That might be worth asking IBM.

The second exception is a NullPointerException, so a null pointer was probably created in your code and then passed around for a while before it caused the exception. That's likely to be painful to track down - the best way is probably to put in a few score asserts to catch null pointers early and run the code with them for a while.
Jim Hicks
Greenhorn

Joined: Jun 23, 2004
Posts: 11
The PRPOFIND method is used in WEBDAV. I would say you are trying to call a webdav method in an environment that does not support it.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: 2 Errors on AS/400
 
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