dispersion = 0 for single job

diff --git a/org.glite.lb.server/src/stats.c b/org.glite.lb.server/src/stats.c
index 45b45ac..78b9717 100644 (file)
--- a/org.glite.lb.server/src/stats.c
+++ b/org.glite.lb.server/src/stats.c
@@ -789,7 +789,10 @@ static int stateDurationFromToRequest(
         *duration /= match;
         *dispersion /= match;
         rate /= match;
-        *dispersion = sqrtf(1/(rate-1) * ((*dispersion) - rate*(*duration)));
+       if (rate > 1)
+               *dispersion = sqrtf(1/(rate-1) * ((*dispersion) - rate*(*duration)));
+       else
+               *dispersion = 0;
 
 cleanup:
         return edg_wll_Error(ctx,NULL,NULL);