add protection for rare infinite loop in ecal multifit

cms-sw · Sep 9, 2015 · ef9303b · ef9303b
1 parent f545ad8
commit ef9303b
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/RecoLocalCalo/EcalRecAlgos/src/PulseChiSqSNNLS.cc b/RecoLocalCalo/EcalRecAlgos/src/PulseChiSqSNNLS.cc
@@ -300,7 +300,7 @@ bool PulseChiSqSNNLS::NNLS() {
   aTbvec = invcovp.transpose()*_covdecomp.matrixL().solve(_sampvec);  
 
   int iter = 0;
-  Index idxwmax;
+  Index idxwmax = 0;
   double wmax = 0.0;
   //work = PulseVector::zeros();
   while (true) {    
@@ -311,10 +311,12 @@ bool PulseChiSqSNNLS::NNLS() {
       const unsigned int nActive = npulse - _nP;
 
       updatework = aTbvec - aTamat*_ampvec;      
+      Index idxwmaxprev = idxwmax;
+      double wmaxprev = wmax;
       wmax = updatework.tail(nActive).maxCoeff(&idxwmax);
 
       //convergence
-      if (wmax<1e-11) break;
+      if (wmax<1e-11 || (idxwmax==idxwmaxprev && wmax==wmaxprev)) break;
 
       //unconstrain parameter
       Index idxp = _nP + idxwmax;