use while loop to re-try to solve

src/core/optimization_container.jl

@@ -671,23 +671,34 @@ function solve_impl!(container::OptimizationContainer, system::PSY.System)
     optimizer_stats = get_optimizer_stats(container)
 
     jump_model = get_jump_model(container)
-    _,
-    optimizer_stats.timed_solve_time,
-    optimizer_stats.solve_bytes_alloc,
-    optimizer_stats.sec_in_gc = @timed JuMP.optimize!(jump_model)
-    model_status = JuMP.primal_status(jump_model)
-    if model_status != MOI.FEASIBLE_POINT::MOI.ResultStatusCode
-        @error "Optimizer returned $model_status trying again"
-        JuMP.optimize!(jump_model)
+
+    model_status = MOI.NO_SOLUTION::MOI.ResultStatusCode
+    conflict_status = MOI.COMPUTE_CONFLICT_NOT_CALLED
+
+    MAX_TRIES = 2
+    try_count = 0
+    while model_status != MOI.FEASIBLE_POINT::MOI.ResultStatusCode
+        _,
+        optimizer_stats.timed_solve_time,
+        optimizer_stats.solve_bytes_alloc,
+        optimizer_stats.sec_in_gc = @timed JuMP.optimize!(jump_model)
         model_status = JuMP.primal_status(jump_model)
-    end
 
-    if model_status != MOI.FEASIBLE_POINT::MOI.ResultStatusCode
-        @error "Optimizer returned $model_status getting conflict"
         if get_calculate_conflict(get_settings(container))
-            compute_conflict!(container)
+            @error "Optimizer returned $model_status computing conflict"
+            conflict_status = compute_conflict!(container)
+            if conflict_status == MOI.CONFLICT_FOUND
+                return RunStatus.FAILED
+            end
+        else
+            @error "Optimizer returned $model_status trying again"
+        end
+
+        try_count += 1
+        if try_count > MAX_TRIES
+            @error "Optimizer returned $model_status after $try_count solve tries"
+            return RunStatus.FAILED
         end
-        return RunStatus.FAILED
     end
 
     status = RunStatus.SUCCESSFUL
@@ -712,8 +723,7 @@ function compute_conflict!(container::OptimizationContainer)
         JuMP.compute_conflict!(jump_model)
         if MOI.get(jump_model, MOI.ConflictStatus()) != MOI.CONFLICT_FOUND
             @error "No conflict could be found for the model. $(MOI.get(jump_model, MOI.ConflictStatus()))"
-
-            return
+            return MOI.get(jump_model, MOI.ConflictStatus())
         end
 
         for (key, field_container) in get_constraints(container)
@@ -726,6 +736,8 @@ function compute_conflict!(container::OptimizationContainer)
             end
         end
         @error "$(conflict)"
+
+        return MOI.get(jump_model, MOI.ConflictStatus())
     catch e
         jump_model.is_model_dirty = true
         if isa(e, MethodError)
@@ -735,7 +747,7 @@ function compute_conflict!(container::OptimizationContainer)
         end
     end
 
-    return
+    return MOI.NO_CONFLICT_EXISTS
 end
 
 function write_optimizer_stats!(container::OptimizationContainer)