[Wrf-users] FW: DRAFT WRF 3.2.1 Bug Report

[Kemp, Eric M. (GSFC-610.0)[NORTHROP GRUMMAN INFORMATION TECH]]

Dear wrfhelp:

I am experiencing problems running WRF3.2.1 on a case that works with WRF3.1.1.  Two grids are used:

 max_dom                             = 2,
 s_we                                = 1,     1,     1,
 e_we                                = 1200, 393, 400,
 s_sn                                = 1,     1,     1,
 e_sn                                = 800, 385, 400,
 s_vert                              = 1,     1,     1,
 e_vert                              = 35,    35,    35,
 num_metgrid_levels                  = 40
 dx                                  = 4000,  2000,  1000,
 dy                                  = 4000,  2000,  1000,

And the initial and lateral boundary conditions are provided by the NAM (00Z 10 April 2009 - 12Z 11 April 2009).

The WRF 3.1.1 runs this case without incident.  However, the WRF3.2.1 will either fail with this message:

FATAL CALLED FROM FILE:  <stdin>  LINE:   15172
 -------------- FATAL CALLED ---------------
 frame/module_domain.f: Failed to allocate grid%smois(sm31:em31,1:model_config_r
 ec%num_soil_layers,sm33:em33).

Or else 3.2.1 will *usually* run with random and immediate CFL errors if "too many" MPI processes are used (above 40).  In a handful of cases, however, the same executable will run without issue.

I've noticed that the 3.2.1 real.exe executable also experiences the memory allocation error.  Also, these problems occur regardless of whether WPS 3.1.1 or 3.2.1 is used to process the NAM data.

I'm running on a Linux distributed cluster, using 40 nodes with 2 dual-core Intel Woodcrest chips with 4 GB RAM per node.  The WRF is compiled with ifort 11.1.038 and Intel MPI 3.2.011.  I've experimented with other MPI implementations (Intel MPI 4.0.0.025 and MVAPICH2-1.4.1) and I see the same behavior.

I have sample namelist.input, wrfinput and wrfbdy files available for upload.

Thanks,

-Eric


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Eric M. Kemp                   Northrop Grumman Corporation
Meteorologist                  Information Systems
Civil Enterprise Solutions     Civil Systems Division

                               Goddard Space Flight Center
                               Mailstop 610.3
                               Greenbelt, MD 20771
                               Telephone   301-286-9768
                               Fax         301-286-1775
                               E-mail:     eric.kemp at nasa.gov
                               E-mail:     eric.kemp at ngc.com
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