On Mon, 11 Aug 2008, Jim Weirich wrote:
On Aug 11, 2008, at 9:35 AM, Ittay Dror wrote:
Note that the current use of threads, in either MultiTask, or the JobTask I
sent earlier is faulty. Imagine tasks A, B, C, D where A => [B, C],
B=>[D], C=>[D]. Now if B and C are invoked in parallel, C invokes D which
fails. C promptly fails. B continues to run and to it D seems to have been
already invoked, so it does its actions assuming D's actions were executed
which isn't true.
Do we need some kind of error state, eg. invoked, but failed?
I've wished for a means of saying task w depends on any of [t,u,v]
succeeding, but I don't care which, but if one works, don't do the
others. I can't remember the application now.
Also, it might be interesting to poke about in the fault tolerant
shell for inspiration.
http://www.cse.nd.edu/~ccl/software/ftsh/
Hugh
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