WebSphere serviceability gem for servlet request issues

 
http://publib.boulder.ibm.com/infocenter/wasinfo/v7r0/topic/com.ibm.websphere.express.doc/info/exp/ae/rweb_custom_props.html

There is a WebContainer custom property you can set that will try to detect and report misuse of the request object:
com.ibm.ws.webcontainer.checkrequestobjectuse

To specify Web container custom properties:

1. In the administrative console click Servers > Application Servers > server_name > Web Container settings > Web Container
2. Under Additional Properties select Custom Properties.
3. On the Custom Properties page, click New.
4. On the settings page, enter the name of the custom property that you want to configure in the Name field and the value that you want to set it to in the Value field.
5. Click Apply or OK.
6. Click Save on the console task bar to save your configuration changes.
7. Restart the server.