[TD-4826]<fix>: new error code 0x0406 (Dnode is exiting) for tsc

src/dnode/src/dnodeShell.c

@@ -116,7 +116,14 @@ static void dnodeProcessMsgFromShell(SRpcMsg *pMsg, SRpcEpSet *pEpSet) {
 
   if (pMsg->pCont == NULL) return;
 
-  if (dnodeGetRunStatus() != TSDB_RUN_STATUS_RUNING) {
+  SRunStatus dnodeStatus = dnodeGetRunStatus();
+  if (dnodeStatus == TSDB_RUN_STATUS_STOPPED) {
+    dError("RPC %p, shell msg:%s is ignored since dnode exiting", pMsg->handle, taosMsg[pMsg->msgType]);
+    rpcMsg.code = TSDB_CODE_DND_EXITING;
+    rpcSendResponse(&rpcMsg);
+    rpcFreeCont(pMsg->pCont);
+    return;
+  } else if (dnodeStatus != TSDB_RUN_STATUS_RUNING) {
     dError("RPC %p, shell msg:%s is ignored since dnode not running", pMsg->handle, taosMsg[pMsg->msgType]);
     rpcMsg.code = TSDB_CODE_APP_NOT_READY;
     rpcSendResponse(&rpcMsg);

src/inc/taoserror.h

@@ -198,6 +198,7 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_DND_INVALID_MSG_LEN           TAOS_DEF_ERROR_CODE(0, 0x0403)  //"Invalid message length")
 #define TSDB_CODE_DND_ACTION_IN_PROGRESS        TAOS_DEF_ERROR_CODE(0, 0x0404)  //"Action in progress")
 #define TSDB_CODE_DND_TOO_MANY_VNODES           TAOS_DEF_ERROR_CODE(0, 0x0405)  //"Too many vnode directories")
+#define TSDB_CODE_DND_EXITING                   TAOS_DEF_ERROR_CODE(0, 0x0406)  //"Dnode is exiting"
 
 // vnode
 #define TSDB_CODE_VND_ACTION_IN_PROGRESS        TAOS_DEF_ERROR_CODE(0, 0x0500)  //"Action in progress")

src/util/src/terror.c

@@ -210,6 +210,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_DND_NO_WRITE_ACCESS,          "No permission for dis
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_INVALID_MSG_LEN,          "Invalid message length")
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_ACTION_IN_PROGRESS,       "Action in progress")
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_TOO_MANY_VNODES,          "Too many vnode directories")
+TAOS_DEFINE_ERROR(TSDB_CODE_DND_EXITING,                  "Dnode is exiting")
 
 // vnode
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_ACTION_IN_PROGRESS,       "Action in progress")