[Coin-discuss] workers segfault

[Paul Pacheco]

I finally got the parallel solver working. 

I want to thank you for such a great framework. My boss just loves sitting 
with me and watching this thing working with xpvm, and seing the parallel 
algorithm in action. He has called everybody in the office to show them how 
this thing works.





I found one last bug before I could get this to work, I attach a patch for 
that.

The symthom was that the slaves were seg faulting and dying after a few 
minutes, and the master didn't realize that, and it eventually hung waiting 
for the dead slaves.

The problem seems to happen when a upper bound is found and sent to all the 
slaves. a this point, the method BCP_lp_process_ub_message is called in the 
slaves, and it tries to access p.lp_solver which is null.

If the patch solves the problem the wrong way, please let me know.
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CONTRIBUTOR'S  STATEMENT OF ORIGIN

I, Paul Pacheco from Wavecode:

(a) represent that

I am the only author and owner of the software

described as a patch fixing process initialization in BCP, and

(b)  represent that either

   (i) this software was neither derived in any other way nor otherwise

   copied from any other software, or

   (ii) that any exception to (i) is software which was obtained under the

   CPL (Common Public License), and

(c)  hereby agree to license this software under the CPL.