Are you getting the exact same exception?  Your original exception cause 
shows a null value for a key in that config:

Caused by: java.io.IOException: Configuration Error:
Line 6: expected [option key], found [null]
at com.sun.security.auth.login.**ConfigFile.match(ConfigFile.**java:577)
at
com.sun.security.auth.login.**ConfigFile.parseLoginEntry(**ry(**