Java Experrts Please Look in....

[Wigwam]

Whenever I try to remotely log into a particular Java App I get the following error after I enter username and password:
"Login Failed
java.lang.NullPointerException"

How can I work out what the problem is and how do I fix it?

More details:
http://img220.imageshack.us/my...image=criserrorgw8.jpg]

[/URL]

 

[mundane]

A better stack trace.

 

[Wigwam]

I have added an image of "more details". WHat does better stack trace mean? I am a Java Noob

 

[trexpesto]

That means that the hss.cris3.jdbc.Controller class is blowing up when it performs loadsystemproperties(), which is on line 1120 of the Controller source code, which you probably can't look at. If well documented, you may try to look at the description of what it does. I couldn't see their API docs online after a quick search.

Null pointer means it is getting a Null value rather than the expected number, string, or Object, when it tries to load the system properties. Perhaps there is a system properties file you can look at? Or else call their admin, could be the problem is on the server box.

You say logging in remotely, that means remote from your own usual machine? or just over the internet?

Edit: try a different browser, just in case.

 

[mundane]

Do you have access to the source? It's showing the class and line numbers at which a null object was being accessed.

 

[Wigwam]

I am logging via my home computer to the work servers. The first time I loaded up that app it asked me for some details [workstation location, which printers I was connected to etc] and right at the end gave that error and ever since I get it as soon as I put my password in so I guess it is something I entered wrong but how can I reset it [or can't I and work have to do it?]
Tried in IE and FF and get the same error

 

[trexpesto]

Not sure what is the problem, trying to find Where it is.


Since you tried a different browser, guessing we can't just clear your cookies.


Are you sure you are supposed to be able to access it from non-LAN workstations? Need to use IP instead of computer name for your workstation? Are you on a VPN?


Can you try another computer?
You should try to find what the program expects you to input so you don't just repeat the same scenario. Manual??

Wayyy easier to ask the admin.

 

[MrChad]

Originally posted by: trexpesto
That means that the hss.cris3.jdbc.Controller class is blowing up when it performs loadsystemproperties(), which is on line 1120 of the Controller source code, which you probably can't look at. If well documented, you may try to look at the description of what it does. I couldn't see their API docs online after a quick search.

Null pointer means it is getting a Null value rather than the expected number, string, or Object, when it tries to load the system properties. Perhaps there is a system properties file you can look at? Or else call their admin, could be the problem is on the server box.

You say logging in remotely, that means remote from your own usual machine? or just over the internet?

Edit: try a different browser, just in case.

This is a good response. Based on that stack trace, I would conclude that the application has not been setup or configured properly. You'll need to work with the vendor to troubleshoot the issue, however, as there is no way for us to diagnose the problem without access to the source code or more detailed log information.