Major Description
For the sample code below:
public class TestKrb { public static void main(String[] args) throws IOException { String user = args[0], path = args[1]; UserGroupInformation ugi = UserGroupInformation.loginUserFromKeytabAndReturnUGI(user, path); System.out.println("Login successfully"); } }
When I use IBM JDK and pass a relative path for the Kerberos keytab, it will throw error messages. According to the debug log, it always tries to read the keytab from the root path. See the debug logs below:
In above log, the useKeytab=<value> entry is showing a <value> prefaced by a leading "//". It appears that HADOOP is adjusting the user supplied keytab file and most likely prefacing it with something like "FILE://", which would cause the resulting IBM normalized value to then be prefaced by "//" before the user supplied keytab file. This is the cause for why relative paths used with HADOOP are not working with IBM JVM's.