diff --git a/src/decoder/interface/DecoderManager.cpp b/src/decoder/interface/DecoderManager.cpp
index d900529..88361a6 100644
--- a/src/decoder/interface/DecoderManager.cpp
+++ b/src/decoder/interface/DecoderManager.cpp
@@ -224,8 +224,7 @@ void DecoderManager::closeAllDecoder()
 
 void DecoderManager::closeAllFinishedDecoder()
 {
-    std::lock_guard<std::mutex> l(m_mutex);
-
+    m_mutex.lock();
      for(auto iter = decoderMap.begin(); iter != decoderMap.end(); ){
         if (iter->second->isFinished())
         {
@@ -235,9 +234,11 @@ void DecoderManager::closeAllFinishedDecoder()
         }
         else
         {
+            LOG_INFO("task {} is running", iter->first);
             iter++ ;
         }
     }
+    m_mutex.unlock();
 }
 
 int DecoderManager::count()