#2201: temperedlb: fix bug where some ranks don't participate if they…

… don't have user-defined blocks

src/vt/vrt/collection/balance/temperedlb/temperedlb.cc

@@ -571,7 +571,6 @@ void TemperedLB::readClustersMemoryData() {
           obj, shared_id, shared_bytes
         );
 
-        has_memory_data_ = true;
         obj_shared_block_[obj] = shared_id;
         obj_working_bytes_[obj] = working_bytes;
         shared_block_size_[shared_id] = shared_bytes;
@@ -647,6 +646,10 @@ void TemperedLB::doLBStages(LoadType start_imb) {
   // Read in memory information if it's available before be do any trials
   readClustersMemoryData();
 
+  if (transfer_type_ == TransferTypeEnum::SwapClusters) {
+    has_memory_data_ = true;
+  }
+
   for (trial_ = 0; trial_ < num_trials_; ++trial_) {
     // Clear out data structures
     selected_.clear();