diff --git a/src/sql/dtl/ob_dtl_basic_channel.cpp b/src/sql/dtl/ob_dtl_basic_channel.cpp
index 811e680100..063b167867 100644
--- a/src/sql/dtl/ob_dtl_basic_channel.cpp
+++ b/src/sql/dtl/ob_dtl_basic_channel.cpp
@@ -392,7 +392,8 @@ int ObDtlBasicChannel::mock_eof_buffer(int64_t timeout_ts)
   return ret;
 }
 
-int ObDtlBasicChannel::attach(ObDtlLinkedBuffer *&linked_buffer, bool is_first_buffer_cached)
+int ObDtlBasicChannel::attach(ObDtlLinkedBuffer *&linked_buffer, bool is_first_buffer_cached,
+                              bool inc_recv_buf_cnt)
 {
   int ret = OB_SUCCESS;
   ObDtlMsgHeader header;
@@ -405,7 +406,9 @@ int ObDtlBasicChannel::attach(ObDtlLinkedBuffer *&linked_buffer, bool is_first_b
     LOG_WARN("failed to deserialize msg header", K(ret));
   } else if (header.is_drain()) {
     alloc_buffer_count();
-    inc_recv_buffer_cnt();
+    if (inc_recv_buf_cnt) {
+      inc_recv_buffer_cnt();
+    }
     dfc_->set_drain(this);
     LOG_TRACE("transmit receive drain cmd", KP(linked_buffer), K(this), KP(id_), KP(peer_id_),
         K(recv_list_.is_empty()));
@@ -424,7 +427,9 @@ int ObDtlBasicChannel::attach(ObDtlLinkedBuffer *&linked_buffer, bool is_first_b
     linked_buffer = nullptr;
     // 将attach收到的是自己申请的，因为释放权交给了当前channel，所以认为这次申请也是自己，与free保持一致，方便统计
     alloc_buffer_count();
-    inc_recv_buffer_cnt();
+    if (inc_recv_buf_cnt) {
+      inc_recv_buffer_cnt();
+    }
     if (is_data_msg) {
       metric_.mark_first_in();
       if (is_eof) {
diff --git a/src/sql/dtl/ob_dtl_basic_channel.h b/src/sql/dtl/ob_dtl_basic_channel.h
index e861817273..e84fbd606c 100644
--- a/src/sql/dtl/ob_dtl_basic_channel.h
+++ b/src/sql/dtl/ob_dtl_basic_channel.h
@@ -357,7 +357,8 @@ public:
   virtual int send(const ObDtlMsg &msg, int64_t timeout_ts,
       ObEvalCtx *eval_ctx = nullptr, bool is_eof = false) override;
   virtual int feedup(ObDtlLinkedBuffer *&buffer) override;
-  virtual int attach(ObDtlLinkedBuffer *&linked_buffer, bool is_first_buffer_cached = false);
+  virtual int attach(ObDtlLinkedBuffer *&linked_buffer, bool is_first_buffer_cached = false,
+                     bool inc_recv_buf_cnt = true);
   // don't call send&flush in different threads.
   virtual int flush(bool wait=true, bool wait_response = true) override;
 
diff --git a/src/sql/dtl/ob_dtl_channel.h b/src/sql/dtl/ob_dtl_channel.h
index 61df85cb27..4c1418c83a 100644
--- a/src/sql/dtl/ob_dtl_channel.h
+++ b/src/sql/dtl/ob_dtl_channel.h
@@ -108,7 +108,8 @@ public:
   virtual int send(const ObDtlMsg &msg, int64_t timeout_ts,
       ObEvalCtx *eval_ctx = nullptr, bool is_eof = false) = 0;
   virtual int feedup(ObDtlLinkedBuffer *&buffer) = 0;
-  virtual int attach(ObDtlLinkedBuffer *&linked_buffer, bool is_firt_buffer_cached = false) = 0;
+  virtual int attach(ObDtlLinkedBuffer *&linked_buffer, bool is_firt_buffer_cached = false,
+                     bool inc_recv_buf_cnt = true) = 0;
   virtual int flush(bool wait=true, bool wait_response = true) = 0;
 
   virtual bool is_empty() const = 0;
diff --git a/src/sql/dtl/ob_dtl_rpc_channel.cpp b/src/sql/dtl/ob_dtl_rpc_channel.cpp
index 25052903af..ba0fe9fcdf 100644
--- a/src/sql/dtl/ob_dtl_rpc_channel.cpp
+++ b/src/sql/dtl/ob_dtl_rpc_channel.cpp
@@ -176,7 +176,7 @@ ObDtlRpcChannel::ObDtlRpcChannel(
     const uint64_t tenant_id,
     const uint64_t id,
     const ObAddr &peer)
-    : ObDtlBasicChannel(tenant_id, id, peer), recv_mock_eof_cnt_(0)
+    : ObDtlBasicChannel(tenant_id, id, peer)
 {}
 
 ObDtlRpcChannel::ObDtlRpcChannel(
@@ -184,7 +184,7 @@ ObDtlRpcChannel::ObDtlRpcChannel(
     const uint64_t id,
     const ObAddr &peer,
     const int64_t hash_val)
-    : ObDtlBasicChannel(tenant_id, id, peer, hash_val), recv_mock_eof_cnt_(0)
+    : ObDtlBasicChannel(tenant_id, id, peer, hash_val)
 {}
 
 ObDtlRpcChannel::~ObDtlRpcChannel()
@@ -233,11 +233,10 @@ int ObDtlRpcChannel::feedup(ObDtlLinkedBuffer *&buffer)
       LOG_TRACE("DTL feedup a new msg to msg loop", K(buffer->size()), KP(id_), K(peer_));
       ObDtlLinkedBuffer::assign(*buffer, linked_buffer);
       if (1 == linked_buffer->seq_no() && linked_buffer->is_data_msg()
-          && 0 != get_recv_buffer_cnt() &&
-          !(1 == get_recv_buffer_cnt() && 1 == recv_mock_eof_cnt_)) {
+          && 0 != get_recv_buffer_cnt()) {
         ret = OB_ERR_UNEXPECTED;
         LOG_WARN("first buffer is not first", K(ret), K(get_id()), K(get_peer_id()),
-                K(get_recv_buffer_cnt()), K(recv_mock_eof_cnt_));
+                K(get_recv_buffer_cnt()), K(linked_buffer->seq_no()));
         free_buf(linked_buffer);
         linked_buffer = nullptr;
       } else if (OB_FAIL(block_on_increase_size(linked_buffer->size()))) {
@@ -250,9 +249,6 @@ int ObDtlRpcChannel::feedup(ObDtlLinkedBuffer *&buffer)
         linked_buffer = nullptr;
       } else if (FALSE_IT(inc_recv_buffer_cnt())) {
       } else {
-        if (1 == buffer->seq_no() && buffer->is_eof() && 0 == buffer->pos()) {
-          recv_mock_eof_cnt_++;
-        }
         if (buffer->is_data_msg()) {
           metric_.mark_first_in();
           if (buffer->is_eof()) {
diff --git a/src/sql/dtl/ob_dtl_rpc_channel.h b/src/sql/dtl/ob_dtl_rpc_channel.h
index 36aad55323..1b58bdd059 100644
--- a/src/sql/dtl/ob_dtl_rpc_channel.h
+++ b/src/sql/dtl/ob_dtl_rpc_channel.h
@@ -101,8 +101,6 @@ public:
   virtual int feedup(ObDtlLinkedBuffer *&buffer) override;
   virtual int send_message(ObDtlLinkedBuffer *&buf);
 
-private:
-  int64_t recv_mock_eof_cnt_;
 };
 
 }  // dtl
diff --git a/src/sql/engine/px/ob_px_rpc_processor.cpp b/src/sql/engine/px/ob_px_rpc_processor.cpp
index a8e93966b5..d06ba69700 100644
--- a/src/sql/engine/px/ob_px_rpc_processor.cpp
+++ b/src/sql/engine/px/ob_px_rpc_processor.cpp
@@ -317,6 +317,8 @@ int ObFastInitSqcReportQCMessageCall::mock_sqc_finish_msg()
           buffer->set_data_msg(false);
           buffer->timeout_ts() = timeout_ts_;
           buffer->set_msg_type(dtl::ObDtlMsgType::FINISH_SQC_RESULT);
+          const bool is_first_buffer_cached = false;
+          const bool inc_recv_buf_cnt = false;
           if (OB_FAIL(common::serialization::encode(buf, size, pos, header))) {
             LOG_WARN("fail to encode buffer", K(ret));
           } else if (OB_FAIL(common::serialization::encode(buf, size, pos, finish_msg))) {
@@ -324,7 +326,7 @@ int ObFastInitSqcReportQCMessageCall::mock_sqc_finish_msg()
           } else if (FALSE_IT(buffer->size() = pos)) {
           } else if (FALSE_IT(pos = 0)) {
           } else if (FALSE_IT(buffer->tenant_id() = ch->get_tenant_id())) {
-          } else if (OB_FAIL(ch->attach(buffer))) {
+          } else if (OB_FAIL(ch->attach(buffer, is_first_buffer_cached, inc_recv_buf_cnt))) {
             LOG_WARN("fail to feedup buffer", K(ret));
           } else if (FALSE_IT(ch->free_buffer_count())) {
           } else {