diff --git a/deps/oblib/src/rpc/obrpc/ob_poc_rpc_proxy.cpp b/deps/oblib/src/rpc/obrpc/ob_poc_rpc_proxy.cpp
index 05370bdf55..1913d2823c 100644
--- a/deps/oblib/src/rpc/obrpc/ob_poc_rpc_proxy.cpp
+++ b/deps/oblib/src/rpc/obrpc/ob_poc_rpc_proxy.cpp
@@ -80,19 +80,24 @@ ObAsyncRespCallback* ObAsyncRespCallback::create(ObRpcMemPool& pool, UAsyncCB* u
   UAsyncCB* cb = NULL;
   ObAsyncRespCallback* pcb = NULL;
   if (NULL == (pcb = (ObAsyncRespCallback*)pool.alloc(sizeof(ObAsyncRespCallback)))) {
+    ret = OB_ALLOCATE_MEMORY_FAILED;
     RPC_LOG(WARN, "alloc resp callback fail", K(ret));
   } else {
     if (NULL != ucb) {
       if (NULL == (cb = ucb->clone(sp_alloc))) {
+        ret = OB_ALLOCATE_MEMORY_FAILED;
+        pcb = NULL;
         RPC_LOG(WARN, "ucb.clone fail", K(ret));
       } else {
         cb->low_level_cb_ = pcb;
         if (cb != ucb) {
           cb->set_cloned(true);
         }
+        new(pcb)ObAsyncRespCallback(pool, cb);
       }
+    } else {
+      new(pcb)ObAsyncRespCallback(pool, NULL);
     }
-    new(pcb)ObAsyncRespCallback(pool, cb);
   }
   return pcb;
 }