[petsc-dev] ParMETIS assertion with pc_gamg_repartition

[John Mousel]

I'm getting a ParMETIS assertion:

[53] ***ASSERTION failed on line 176 of file
/nics/b/home/jmousel/NumericalLibraries/petsc/intel-debug/externalpackages/parmetis-4.0.3-p1/libparmetis/comm.c:
j == nnbrs
[110] ***ASSERTION failed on line 176 of file
/nics/b/home/jmousel/NumericalLibraries/petsc/intel-debug/externalpackages/parmetis-4.0.3-p1/libparmetis/comm.c:
j == nnbrs

when I add -redistribute_pc_gamg_repartition true to my option list:

 -pres_ksp_type preonly -pres_pc_type redistribute
-pres_redistribute_ksp_type pgmres -pres_redistribute_pc_type gamg
-pres_redistribute_pc_gamg_threshold 0.05
-pres_redistribute_mg_levels_ksp_type richardson
-pres_redistribute_mg_levels_pc_type sor
-pres_redistribute_mg_coarse_ksp_type richardson
-pres_redistribute_mg_coarse_pc_type sor
-pres_redistribute_mg_coarse_pc_sor_its 3 -pres_redistribute_mg_type full
-pres_redistribute_pc_gamg_type agg -pres_redistribute_pc_gamg_agg_nsmooths
1 -pres_redistribute_pc_gamg_sym_graph true -ELAFINT_flex_comm_size 16
-vel_ksp_type ibcgs -vel_ksp_monitor -pres_redistribute_ksp_monitor
-lspaint_ksp_monitor -pres_redistribute_pc_gamg_repartition true
-pres_redistribute_pc_gamg_reuse_interpolation

There is no additional stack trace to provide. I receive the same message
for 12, 48, 60, and 120 cores. The matrix has about 12 million rows.


John
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