When Kerberizing the cluster with MIT KDC, all tickets are generated as 
non-renewable by default (renewable flag is not set). Without the renewal, new 
tickets are re-generated upon expiration, but renewal is important because some 
long running jobs might actually take advantage of renewing the ticket so they 
can continue running.

How are you dealing with the fact that the tickets are issued as non-renewable? 
Is anyone aware of a way to make all tickets generated as renewable by default? 
The only way I am aware of is by using "kadmin" as
    modprinc -maxrenewlife "1 week" +allow_renewable 
hive/[email protected]
but this needs to be done for each principal/host.

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