CI[pyFV3]: retry even when connection is refused (#1734)

According to @phschaad, the pyFV3 workflow occasionally fails with
connection refused errors when attempting to download the test data set
for regression testing. This PR configures `wget` to retry even in case
of fatal connection errors (like 404 (not found) or 503 (connection
refused)).

Let's see if this helps in the short term. In the long run, we should
think about leveraging caches for that data because it rarely changes
and it's kind of a wast to download it every time from scratch.

Follow-up PR from
#1731 (comment).

/cc @FlorianDeconinck FYI

Co-authored-by: Roman Cattaneo <>

.github/workflows/pyFV3-ci.yml

@@ -53,11 +53,11 @@ jobs:
           cd pyFV3
           mkdir -p test_data
           cd test_data
-          wget https://portal.nccs.nasa.gov/datashare/astg/smt/pace-regression-data/8.1.3_c12_6ranks_standard.D_SW.tar.gz
+          wget --retry-connrefused https://portal.nccs.nasa.gov/datashare/astg/smt/pace-regression-data/8.1.3_c12_6ranks_standard.D_SW.tar.gz
           tar -xzvf 8.1.3_c12_6ranks_standard.D_SW.tar.gz
-          wget https://portal.nccs.nasa.gov/datashare/astg/smt/pace-regression-data/8.1.3_c12_6ranks_standard.RiemSolver3.tar.gz
+          wget --retry-connrefused https://portal.nccs.nasa.gov/datashare/astg/smt/pace-regression-data/8.1.3_c12_6ranks_standard.RiemSolver3.tar.gz
           tar -xzvf 8.1.3_c12_6ranks_standard.RiemSolver3.tar.gz
-          wget https://portal.nccs.nasa.gov/datashare/astg/smt/pace-regression-data/8.1.3_c12_6ranks_standard.Remapping.tar.gz
+          wget --retry-connrefused https://portal.nccs.nasa.gov/datashare/astg/smt/pace-regression-data/8.1.3_c12_6ranks_standard.Remapping.tar.gz
           tar -xzvf 8.1.3_c12_6ranks_standard.Remapping.tar.gz
           cd ../..
       # Clean up caches between run for stale un-expanded SDFG to trip the build system (NDSL side issue)