spring security - How to use cached ticket with KerberosRestTemplate? -

i want implement integration test spring security kerberos authentication. there kerberosresttemplate (reference) purpose. kerberosresttemplate has got default constructor description "leave keytablocation , userprincipal empty if want use cached ticket".

for research wrote trivial class:

   public static void main(string[] args) {         kerberosresttemplate krt = new kerberosresttemplate();         string result = krt.getforobject("http://testserver.testad.local:8080/", string.class);         system.out.println(result);     } 

when run it, exception has thrown:

exception in thread "main" org.springframework.web.client.restclientexception: error running rest call; nested exception java.lang.illegalargumentexception: null name not allowed         @ org.springframework.security.kerberos.client.kerberosresttemplate.doexecute(kerberosrestt emplate.java:196)         @ org.springframework.web.client.resttemplate.execute(resttemplate.java:530)         @ org.springframework.web.client.resttemplate.getforobject(resttemplate.java:237)         @ edu.mezlogo.application.main(application.java:9) caused by: java.lang.illegalargumentexception: null name not allowed         @ sun.security.krb5.principalname.<init>(unknown source)         @ sun.security.krb5.principalname.<init>(unknown source)         @ javax.security.auth.kerberos.kerberosprincipal.<init>(unknown source)         @ javax.security.auth.kerberos.kerberosprincipal.<init>(unknown source)         @ org.springframework.security.kerberos.client.kerberosresttemplate.doexecute(kerberosrestt emplate.java:182)         ... 3 more 

my klist contain correct cached ticket, service.

#2>     client: deniz @ testad.local         server: http/testserver.testad.local @ testad.local         kerbticket encryption type: rsadsi rc4-hmac(nt)         ticket flags 0x40a10000 -> forwardable renewable pre_authent name_canonicalize         start time: 2/5/2016 6:17:39 (local)         end time:   2/5/2016 16:16:32 (local)         renew time: 2/12/2016 6:16:32 (local)         session key type: rsadsi rc4-hmac(nt) 

and browser (firefox) has successful authenticated kerberos sso.

i use windows server 2012. , windows 7 client.

how use cached ticket? (and ktpass can generate client keytab?)

p.s. sorry english.

you checking windows credentials cache - while java maintaining it's separate. in order view java's credentials cache should execute klist command jre/bin folder