[Swift-devel] hanging without allocating a host

[Ben Clifford]

In the last couple of runs that mike kubal has made, with a large number 
of file transfer failures, the workflow eventually hangs with no karajan 
tasks in progress, and (according to a debug line I just added) 
apparently waiting for a host to be allocated - this will, I guess, never 
happen as nothing is happening to change the host scores. bleugh.

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