Unable to find LoginModule class: com.sun.security.auth.module.Krb5LoginModule When Configuring Custom Kerberos Login Module via JAAS Config File (Doc ID 2797357.1)

Last updated on JANUARY 04, 2023

Applies to:

Symptoms

Unable to use com.sun.security.auth.module.Krb5LoginModule with ojdbc8.jar when connecting to Oracle DB using Kerberos based authentication.

JDBC Thin driver 18.3 ojdbc8.jar always uses com.sun.security.auth.module.Krb5LoginModule for Kerberos connection.

It does not use the custom login module even after it has been configured:

-Djava.security.auth.login.config=/data/.java.login.config

Exception trace:

java.sql.SQLRecoverableException: IO Error: The service in process is not supported. unable to find LoginModule class: com.sun.security.auth.module.Krb5LoginModule

        at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:797)

        at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:778)

        at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)

        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:700)

        at java.sql.DriverManager.getConnection(DriverManager.java:675)

        at java.sql.DriverManager.getConnection(DriverManager.java:219)

Changes

Cause

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.