[ET Trac] [Einstein Toolkit] #534: Checkpointing fails on LoneStar

[Einstein Toolkit]

#534: Checkpointing fails on LoneStar
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  Reporter:  hinder  |       Owner:  eschnett    
      Type:  defect  |      Status:  new         
  Priority:  major   |   Milestone:              
 Component:  Carpet  |     Version:              
Resolution:          |    Keywords:  CarpetIOHDF5
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Comment (by eschnett):

 There are two reasons why Carpet calls MPI during output. The first is for
 testing that the value of DISTRIB=constant grid arrays is the same on all
 processes; if not, a warning is output. This is probably what you are
 seeing here. The second is to ensure that all MPI processes have
 successfully finished closing the output files before the previous
 checkpoint files are deleted.

 It seems that Lonestar cannot handle a simple MPI_Bcast operation. This
 would indicate a problem with the MPI setup there. You could either look
 at Lonestar's documentation and compare it to the option list and run
 script you are using, or contact their help desk and ask for advice.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/534#comment:1>
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