return -1 if connection is already closed

src/inc/trpc.h

@@ -83,7 +83,7 @@ void  rpcSendResponse(const SRpcMsg *pMsg);
 void  rpcSendRedirectRsp(void *pConn, const SRpcIpSet *pIpSet); 
 int   rpcGetConnInfo(void *thandle, SRpcConnInfo *pInfo);
 void  rpcSendRecv(void *shandle, SRpcIpSet *pIpSet, const SRpcMsg *pReq, SRpcMsg *pRsp);
-void  rpcReportProgress(void *pConn, char *pCont, int contLen);
+int   rpcReportProgress(void *pConn, char *pCont, int contLen);
 
 #ifdef __cplusplus
 }

src/rpc/src/rpcMain.c

@@ -486,12 +486,19 @@ void rpcSendRecv(void *shandle, SRpcIpSet *pIpSet, const SRpcMsg *pMsg, SRpcMsg
 }
 
 // this API is used by server app to keep an APP context in case connection is broken
-void rpcReportProgress(void *handle, char *pCont, int contLen) {
+int rpcReportProgress(void *handle, char *pCont, int contLen) {
   SRpcConn *pConn = (SRpcConn *)handle;
 
-  // pReqMsg and reqMsgLen is re-used to store the context from app server
-  pConn->pReqMsg = pCont;     
-  pConn->reqMsgLen = contLen;
+  if (pConn->user[0]) {
+    // pReqMsg and reqMsgLen is re-used to store the context from app server
+    pConn->pReqMsg = pCont;     
+    pConn->reqMsgLen = contLen;
+    return 0;
+  } 
+
+  tTrace("%s, rpc connection is already released", pConn->info);
+  rpcFreeCont(pCont);
+  return -1;
 }
 
 static void rpcFreeMsg(void *msg) {