JDK-8163104 : Unexpected NPE still possible on some Kerberos ticket calls
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JDK-8147772 fixed up most NPE issues for KerberosTickets. Howerver, I think there are still some corner cases. Here's one example :
Dev engineer has suggested that methods like Krb5InitCredential::getInitLifeTime should return 0 if null pointer is encountered (ticket destroyed scenario). if code is calling this method without checking isDestroyed() first, this will convince end user that the ticket is no longer usable.
There are a few other related calls that need tightening also