jojochuang commented on issue #1681: HADOOP-16672 : adding null check for ticket.doAs() while setting up I… URL: https://github.com/apache/hadoop/pull/1681#issuecomment-548942409 Do you know when the ticket is null? Can you post a stack trace so that it's easier to tell why. Looking at a few callers, the ticket is usually obtained via UGI#getCurrentUser() which never returns null. To me the client should raise and exception and abort if the ticket is null when SASL is on. In any case the connection will fail (because of lack of SASL negotiation) so why not fail early.
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