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Strange null exception on Tomcat 6.0.18

Slawek Ch
Greenhorn

Joined: Oct 16, 2008
Posts: 2
I have a big problem with removing attributes by Tomcat 6.0.18. This happens after migrating from Tomcat 5.5.23 (on this version there wasn't such error). Exception occur occasionally and for now I don't know how to resolve it. Below there is a stack trace from error:



Anyone know how to resolve it, please?
William Brogden
Author and all-around good cowpoke
Rancher

Joined: Mar 22, 2000
Posts: 12769
    
    5
Looking at the source code around line 1354 for Tomcat 6.0.18 we find:


Looks like if context is null you get an NPE

Around line 500 there are setContext and getContext methods - this is the normal javax.servlet.ServletContext we are talking about.

To further track this down, you might try calling the request getContext method to see if it is null before calling the removeAtribute method.

Bill
Slawek Ch
Greenhorn

Joined: Oct 16, 2008
Posts: 2
Now I'm using Tomcat 6.0.9 problem doesn't occur. It happens only from version 6.0.10 or higher. Maybe it is Tomcat new bug.

Anyway thanks for suggestion.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: Strange null exception on Tomcat 6.0.18