feature(udf):start udfd can be disabled

include/common/tglobal.h

@@ -121,6 +121,9 @@ extern char     tsCompressor[];
 extern int32_t  tsDiskCfgNum;
 extern SDiskCfg tsDiskCfg[];
 
+// udf
+extern bool  tsStartUdfd;
+
 // internal
 extern int32_t tsTransPullupInterval;
 extern int32_t tsMqRebalanceInterval;

source/common/src/tglobal.c

@@ -169,6 +169,9 @@ uint32_t tsMaxRange = 500;                      // max range
 uint32_t tsCurRange = 100;                      // range
 char     tsCompressor[32] = "ZSTD_COMPRESSOR";  // ZSTD_COMPRESSOR or GZIP_COMPRESSOR
 
+// udf
+bool     tsStartUdfd = true;
+
 // internal
 int32_t tsTransPullupInterval = 6;
 int32_t tsMqRebalanceInterval = 2;
@@ -441,6 +444,7 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
   if (cfgAddInt32(pCfg, "transPullupInterval", tsTransPullupInterval, 1, 10000, 1) != 0) return -1;
   if (cfgAddInt32(pCfg, "mqRebalanceInterval", tsMqRebalanceInterval, 1, 10000, 1) != 0) return -1;
 
+  if (cfgAddBool(pCfg, "startUdfd", tsStartUdfd, 0) != 0) return -1;
   return 0;
 }
 
@@ -581,6 +585,8 @@ static int32_t taosSetServerCfg(SConfig *pCfg) {
   tsTransPullupInterval = cfgGetItem(pCfg, "transPullupInterval")->i32;
   tsMqRebalanceInterval = cfgGetItem(pCfg, "mqRebalanceInterval")->i32;
 
+  tsStartUdfd = cfgGetItem(pCfg, "startUdfd")->bval;
+
   if (tsQueryBufferSize >= 0) {
     tsQueryBufferSizeBytes = tsQueryBufferSize * 1048576UL;
   }

source/libs/function/src/tudf.c

@@ -18,6 +18,7 @@
 #include "tudf.h"
 #include "tudfInt.h"
 #include "tarray.h"
+#include "tglobal.h"
 #include "tdatablock.h"
 #include "querynodes.h"
 #include "builtinsimpl.h"
@@ -138,6 +139,9 @@ static void udfWatchUdfd(void *args) {
 }
 
 int32_t udfStartUdfd(int32_t startDnodeId) {
+  if (!tsStartUdfd) {
+    fnInfo("start udfd is disabled.")
+  }
   SUdfdData *pData = &udfdGlobal;
   if (pData->startCalled) {
     fnInfo("dnode-mgmt start udfd already called");