Are you using response.encodeURL()
? If so, try to remove it or disable "URL Rewriting" and check the URL.
See also:
Apache Tomcat Configuration Reference
Additional information:
response.encodeURL(URL)
adds ;jsessionid=xxxx...
to URL. To disable this(="URL Rewriting"),
Tomcat 7.0 or later:
<session-config>
<tracking-mode>COOKIE</tracking-mode>
</session-config>
Tomcat 6.0:
<Context disableURLRewriting="true" ...