diff --git a/mpp/codec/mpp_dec.cpp b/mpp/codec/mpp_dec.cpp
index d57e8ca7..8cb3b2d8 100644
--- a/mpp/codec/mpp_dec.cpp
+++ b/mpp/codec/mpp_dec.cpp
@@ -566,7 +566,7 @@ void *mpp_dec_parser_thread(void *data)
             continue;
 
     }
-
+    mpp_log("mpp_dec_parser_thread exit");
     if (NULL != task.hnd && task_dec->valid) {
         mpp_buf_slot_set_flag(packet_slots, task_dec->input, SLOT_CODEC_READY);
         mpp_buf_slot_set_flag(packet_slots, task_dec->input, SLOT_HAL_INPUT);
@@ -575,6 +575,7 @@ void *mpp_dec_parser_thread(void *data)
             mpp_buffer_put(task.hal_pkt_buf_in);
     }
     mpp_buffer_group_clear(mpp->mPacketGroup);
+    mpp_log("mpp_dec_parser_thread exit ok");
     return NULL;
 }
 
@@ -695,6 +696,7 @@ void *mpp_dec_hal_thread(void *data)
         }
     }
 
+    mpp_log("mpp_dec_hal_thread exit ok");
     return NULL;
 }
 
diff --git a/mpp/mpp.cpp b/mpp/mpp.cpp
index a205722b..0fff03c5 100644
--- a/mpp/mpp.cpp
+++ b/mpp/mpp.cpp
@@ -85,7 +85,9 @@ MPP_RET Mpp::init(MppCtxType type, MppCodingType coding)
         mpp_dec_init(mDec, coding);
 
         mThreadCodec = new MppThread(mpp_dec_parser_thread, this);
+        mpp_log("mThreadCodec = %p",mThreadCodec);
         mThreadHal  = new MppThread(mpp_dec_hal_thread, this);
+        mpp_log("mThreadHal = %p",mThreadHal);
 
         mpp_buffer_group_get_internal(&mInternalGroup, MPP_BUFFER_TYPE_ION);
         mpp_buffer_group_get_internal(&mPacketGroup, MPP_BUFFER_TYPE_ION);
diff --git a/osal/mpp_thread.cpp b/osal/mpp_thread.cpp
index 64b2c9eb..481c7f26 100644
--- a/osal/mpp_thread.cpp
+++ b/osal/mpp_thread.cpp
@@ -64,6 +64,7 @@ void MppThread::stop()
     if (MPP_THREAD_UNINITED != mStatus) {
         lock();
         mStatus = MPP_THREAD_STOPPING;
+        mpp_log("MPP_THREAD_STOPPING status set mThread %p",this);
         signal();
         unlock();
         void *dummy;