cellVariable.min() broken in parallel

[wd15]

The following breaks on bunter in parallel

from fipy import Grid2D, CellVariable
mesh = Grid2D(nx=5, ny=5)
v = CellVariable(mesh=mesh)
print v.min()

with

 (trunk)bunter[wd15]: mpirun -np 2 python tmp.py --trilinos
Traceback (most recent call last):
  File "tmp.py", line 7, in <module>
print v.min()
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/variable.py", line 361, in __str__
Traceback (most recent call last):
  File "tmp.py", line 7, in <module>
return str(self.value)
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/variable.py", line 538, in _getValue
print v.min()
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/variable.py", line 361, in __str__
value = self._calcValue()
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/operatorVariable.py", line 73, in _calcValue
return self._calcValue_()
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/unaryOperatorVariable.py", line 40, in _calcValue_
return str(self.value)
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/variable.py", line 538, in _getValue
return self.op(self.var[0].value)
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/meshVariable.py", line 427, in minParallel
value = self._calcValue()
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/operatorVariable.py", line 73, in _calcValue
fn=a.min, fnParallel=self.mesh.communicator.epetra_comm.MinAll)
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/meshVariable.py", line 409, in _maxminparallel_
return self._calcValue_()
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/unaryOperatorVariable.py", line 40, in _calcValue_
return fnParallel(nodeVal)
  File "/users/wd15/.virtualenvs/trunk/lib/python2.6/site-packages/PyTrilinos/Epetra.py", line 4914, in MinAll
return self.op(self.var[0].value)
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/meshVariable.py", line 427, in minParallel
fn=a.min, fnParallel=self.mesh.communicator.epetra_comm.MinAll)
  File "/users/wd15/work/matforge/fipy/trunk/fipy/variables/meshVariable.py", line 409, in _maxminparallel_
return _Epetra.Comm_MinAll(self, *args)
TypeError: Require int, long or double array, got notype array
return fnParallel(nodeVal)
  File "/users/wd15/.virtualenvs/trunk/lib/python2.6/site-packages/PyTrilinos/Epetra.py", line 4914, in MinAll
return _Epetra.Comm_MinAll(self, *args)
TypeError: Require int, long or double array, got notype array

Imported from trac ticket #421, created by wd15 on 01-13-2012 at 18:34, last modified: 01-31-2012 at 15:54

[wd15]

If this gets fixed go back and fix trunk/examples/cahnHilliard/mesh2D.py?rev=5112#L131 so it uses phi.min().

Trac comment by wd15 on 01-13-2012 at 18:36

[wd15]

Fixed on bunter with r5146.

Trac comment by wd15 on 01-31-2012 at 15:54