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On Saturday, November 30, 2019, 6:18 AM, Mark Thomas <> wrote:

On 29/11/2019 21:28, Karen Goh wrote:
> I have done so but it is no use. I have deleted the Tomcat and add an new 
> instance before run the server again.
> caused by java.lang.IllegalArgumentException : Filter mapping specifies an 
> unknown filter name[SessionValidator]
> Sorry I am having problem with writing here using Yahoo mail n I have to type 
> things out in iPhone so I can’t copy n paste the entire error message. Should 
> you need more info in order to help me I hope I can just write above the 
> reply message.

You seem to be missing the point. The problematic filter is named:


You need to find where that is referenced in your code and/or configuration.
I can’t find this filter at all, even though I am playing with something along 
the line of httpHeaderSecurity (JWT/JSSE etc to be precise) but my project is 
done intermittently cos most of the time I am meshing up the code from various 
sources and use it...
What do I do in this case?  Re-start a fresh project?


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