java.lang.SecurityException: Configuration Error: Line 2: expected [controlFlag]

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Configuration Error: Line 2: expected [controlFlag]
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Unable to locate a login configuration
java.lang.SecurityException: Configuration Error: Line 2: expected [controlFlag]
at com.sun.security.auth.login.ConfigFile.match(Unknown Source)
at com.sun.security.auth.login.ConfigFile.parseLoginEntry(Unknown Source)
at com.sun.security.auth.login.ConfigFile.readConfig(Unknown Source)
at com.sun.security.auth.login.ConfigFile.init(Unknown Source)
at com.sun.security.auth.login.ConfigFile.init(Unknown Source)
at com.sun.security.auth.login.ConfigFile.(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at javax.security.auth.login.Configuration$3.run(Unknown Source)
at javax.security.auth.login.Configuration$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.login.Configuration.getConfiguration(Unknown Source)
at javax.security.auth.login.LoginContext$1.run(Unknown Source)
at javax.security.auth.login.LoginContext$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.login.LoginContext.init(Unknown Source)
at net.sourceforge.spnego.SpnegoHttpURLConnection.(SpnegoHttpURLConnection.java:206)
at undefined.HelloKeytab.main(HelloKeytab.java:15)

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