[TS-981]<fix>(other): new config parameter offlineInterval

src/balance/src/bnMain.c

@@ -567,7 +567,7 @@ void bnCheckStatus() {
   while (1) {
     pIter = mnodeGetNextDnode(pIter, &pDnode);
     if (pDnode == NULL) break;
-    if (tsAccessSquence - pDnode->lastAccess > 3) {
+    if (tsAccessSquence - pDnode->lastAccess > tsOfflineInterval) {
       if (pDnode->status != TAOS_DN_STATUS_DROPPING && pDnode->status != TAOS_DN_STATUS_OFFLINE) {
         pDnode->status = TAOS_DN_STATUS_OFFLINE;
         pDnode->offlineReason = TAOS_DN_OFF_STATUS_MSG_TIMEOUT;

src/common/inc/tglobal.h

@@ -119,6 +119,7 @@ extern int32_t tsdbWalFlushSize;
 extern int8_t  tsEnableBalance;
 extern int8_t  tsAlternativeRole;
 extern int32_t tsBalanceInterval;
+extern int32_t tsOfflineInterval;
 extern int32_t tsOfflineThreshold;
 extern int32_t tsMnodeEqualVnodeNum;
 extern int8_t  tsEnableFlowCtrl;

src/common/src/tglobal.c

@@ -164,6 +164,7 @@ int32_t tsdbWalFlushSize = TSDB_DEFAULT_WAL_FLUSH_SIZE;  // MB
 int8_t  tsEnableBalance = 1;
 int8_t  tsAlternativeRole = 0;
 int32_t tsBalanceInterval = 300;          // seconds
+int32_t tsOfflineInterval = 3;
 int32_t tsOfflineThreshold = 86400 * 10;  // seconds of 10 days
 int32_t tsMnodeEqualVnodeNum = 4;
 int8_t  tsEnableFlowCtrl = 1;
@@ -653,6 +654,16 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "offlineInterval";
+  cfg.ptr = &tsOfflineInterval;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = 1;
+  cfg.maxValue = 600;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   // 0-any; 1-mnode; 2-vnode
   cfg.option = "role";
   cfg.ptr = &tsAlternativeRole;

src/util/inc/tconfig.h

@@ -20,7 +20,7 @@
 extern "C" {
 #endif
 
-#define TSDB_CFG_MAX_NUM    130
+#define TSDB_CFG_MAX_NUM    131
 #define TSDB_CFG_PRINT_LEN  23
 #define TSDB_CFG_OPTION_LEN 24
 #define TSDB_CFG_VALUE_LEN  41