Skip coadding sub-region early if there is no valid data.

lsst · Dec 4, 2018 · b7b596a · b7b596a
1 parent defe6db
commit b7b596a
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/python/lsst/pipe/tasks/dcrAssembleCoadd.py b/python/lsst/pipe/tasks/dcrAssembleCoadd.py
@@ -401,6 +401,10 @@ def run(self, skyInfo, tempExpRefList, imageScalerList, weightList,
                                                                   imageScalerList, weightList,
                                                                   spanSetMaskList,
                                                                   stats.ctrl)
+                    if convergenceMetric == 0:
+                        self.log.warn("Coadd %s had convergence metric of 0.0 which is most likely"
+                                      " due to there being no valid data in the region.", subBBox)
+                        break
                     convergenceCheck = (convergenceList[-1] - convergenceMetric)/convergenceMetric
                     if convergenceCheck < 0:
                         self.log.warn("Coadd %s diverged before reaching maximum iterations or"