Vijay Srinivasaraghavan resolved FLINK-3670.
       Resolution: Fixed
    Fix Version/s: 1.2.0

Resolved as part of FLINK-3929

> Kerberos: Improving long-running streaming jobs
> -----------------------------------------------
>                 Key: FLINK-3670
>                 URL: https://issues.apache.org/jira/browse/FLINK-3670
>             Project: Flink
>          Issue Type: Improvement
>          Components: Client, Local Runtime
>            Reporter: Maximilian Michels
>            Assignee: Vijay Srinivasaraghavan
>             Fix For: 1.2.0
> We have seen in the past, that Hadoop's delegation tokens are subject to a 
> number of subtle token renewal bugs. In addition, they have a maximum life 
> time that can be worked around but is very inconvenient for the user.
> As per [mailing list 
> discussion|http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/Kerberos-for-Streaming-amp-Kafka-td10906.html],
>  a way to work around the maximum life time of DelegationTokens would be to 
> pass the Kerberos principal and key tab upon job submission. A daemon could 
> then periodically renew the ticket. 

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