java - web.xml invalidates my session -

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i'm trying error-code handling page in web.xml. if placed code in webxml:

<error-page>     <error-code>404</error-code>     <location>/errorpage.html</location>  </error-page>

my session invalidated after logging in. on error 404 codes since tried 403, didn't invalidate session.

can tell me what's wrong webxml or server?


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