Troubleshooting SpnegoHelloClient.java

No LoginModules configured for...

Open your login.conf file and your SpnegoHelloClient.java file and confirm that you have provided the correct login module name.

Client not found in Kerberos database (6)

Open your SpnegoHelloClient.java file and confirm that you have provided the correct username

Pre-authentication information was invalid (24)

Open your SpnegoHelloClient.java file and confirm that you have provided the correct password

Server not found in Kerberos database (7)

Open your SpnegoHelloClient.java file and confirm that you have the correct path/url to the web service

Also, confirm that all is working as expected by running the hello_spnego.jsp example

Links:
pre-flight checklist
install guide - tomcat
install guide - jboss
install guide - glassfish
install guide - spring boot 2.x
install guide - spring boot 3.x
enable authZ with LDAP
get user group info from LDAP
reference docs
api docs
download

Troubleshooting:
HelloKDC.java
hello_spnego.jsp
HelloKeytab.java
hello_delegate.jsp
SpnegoHelloClient.java
ExampleSpnegoAuthenticatorValve.java

Examples:
create keytab for client
create keytab for app server
credential delegation
protected SOAP Web Service
tomcat authenticator valve
jboss authenticator valve
authZ for standalone apps
protecting edit button on page

Licensing:
GNU LGPL