diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/task/SchedulerExecutorService.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/task/SchedulerExecutorService.java
index 047be1069..fb6ab5351 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/task/SchedulerExecutorService.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/task/SchedulerExecutorService.java
@@ -36,7 +36,10 @@ class SchedulerExecutorService extends Scheduler {
 
     @Override
     public Future<?> schedule(ExceptionalRunnable<?> block) {
-        return executorService.submit(block.toCallable());
+        if (executorService.isShutdown() || executorService.isTerminated())
+            return Schedulers.NONE.schedule(block);
+        else
+            return executorService.submit(block.toCallable());
     }
 
 }
diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/task/Schedulers.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/task/Schedulers.java
index 793ed8575..7ba61c2b9 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/task/Schedulers.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/task/Schedulers.java
@@ -17,6 +17,8 @@
  */
 package org.jackhuang.hmcl.task;
 
+import org.jackhuang.hmcl.util.Constants;
+
 import java.util.concurrent.*;
 
 /**
@@ -112,6 +114,8 @@ public final class Schedulers {
         return newThread();
     }
 
+    static final Scheduler NONE = new SchedulerImpl(Constants.emptyConsumer());
+
     public static synchronized void shutdown() {
         if (CACHED_EXECUTOR != null)
             CACHED_EXECUTOR.shutdown();