diff --git a/game-app/game-headed/src/main/java/games/strategy/triplea/ui/TripleAFrame.java b/game-app/game-headed/src/main/java/games/strategy/triplea/ui/TripleAFrame.java
index 6c33b4e9609..40eb389cda0 100644
--- a/game-app/game-headed/src/main/java/games/strategy/triplea/ui/TripleAFrame.java
+++ b/game-app/game-headed/src/main/java/games/strategy/triplea/ui/TripleAFrame.java
@@ -109,6 +109,7 @@
 import java.util.Optional;
 import java.util.Set;
 import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Supplier;
@@ -706,14 +707,7 @@ public FightBattleDetails getBattle(
   public void notifyError(final String message) {
     final String displayMessage =
         LocalizeHtml.localizeImgLinksInHtml(message, uiContext.getMapLocation());
-    messageAndDialogThreadPool.submit(
-        () ->
-            EventThreadJOptionPane.showMessageDialogWithScrollPane(
-                TripleAFrame.this,
-                displayMessage,
-                "Error",
-                JOptionPane.ERROR_MESSAGE,
-                getUiContext().getCountDownLatchHandler()));
+    showMessageDialog(displayMessage, "Error", JOptionPane.ERROR_MESSAGE);
   }
 
   /** We do NOT want to block the next player from beginning their turn. */
@@ -742,14 +736,22 @@ public void notifyMessage(final String message, final String title) {
     }
     final String displayMessage =
         LocalizeHtml.localizeImgLinksInHtml(message, uiContext.getMapLocation());
-    messageAndDialogThreadPool.submit(
-        () ->
-            EventThreadJOptionPane.showMessageDialogWithScrollPane(
-                TripleAFrame.this,
-                displayMessage,
-                title,
-                JOptionPane.INFORMATION_MESSAGE,
-                getUiContext().getCountDownLatchHandler()));
+    showMessageDialog(displayMessage, title, JOptionPane.INFORMATION_MESSAGE);
+  }
+
+  private void showMessageDialog(String displayMessage, String title, int type) {
+    try {
+      messageAndDialogThreadPool.submit(
+          () ->
+              EventThreadJOptionPane.showMessageDialogWithScrollPane(
+                  TripleAFrame.this,
+                  displayMessage,
+                  title,
+                  type,
+                  getUiContext().getCountDownLatchHandler()));
+    } catch (RejectedExecutionException e) {
+      // The thread pool may have been shutdown. Nothing to do.
+    }
   }
 
   /**