Allow shutdown during LoadMempool, dump only when necessary

src/init.cpp

@@ -130,6 +130,7 @@ static const char* FEE_ESTIMATES_FILENAME="fee_estimates.dat";
 //
 
 std::atomic<bool> fRequestShutdown(false);
+std::atomic<bool> fDumpMempoolLater(false);
 
 void StartShutdown()
 {
@@ -209,7 +210,8 @@ void Shutdown()
 
     StopTorControl();
     UnregisterNodeSignals(GetNodeSignals());
-    DumpMempool();
+    if (fDumpMempoolLater)
+        DumpMempool();
 
     if (fFeeEstimatesInitialized)
     {
@@ -667,6 +669,7 @@ void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
     }
     } // End scope of CImportingNow
     LoadMempool();
+    fDumpMempoolLater = !fRequestShutdown;
 }
 
 /** Sanity checks

src/validation.cpp

@@ -4076,6 +4076,8 @@ bool LoadMempool(void)
             } else {
                 ++skipped;
             }
+            if (ShutdownRequested())
+                return false;
         }
         std::map<uint256, CAmount> mapDeltas;
         file >> mapDeltas;