diff --git a/include/common/tgrant.h b/include/common/tgrant.h
index bc0e5a9cca..eb27c086c4 100644
--- a/include/common/tgrant.h
+++ b/include/common/tgrant.h
@@ -31,6 +31,8 @@ extern "C" {
 #endif
 
 #define GRANT_HEART_BEAT_MIN 2
+#define GRANT_ACTIVE_CODE    "activeCode"
+#define GRANT_C_ACTIVE_CODE  "cActiveCode"
 
 typedef enum {
   TSDB_GRANT_ALL,
@@ -50,6 +52,11 @@ typedef enum {
   TSDB_GRANT_TABLE,
 } EGrantType;
 
+typedef struct {
+  int64_t grantedTime;
+  int64_t connGrantedTime;
+} SGrantedInfo;
+
 int32_t grantCheck(EGrantType grant);
 int32_t grantAlterActiveCode(int32_t did, const char* old, const char* newer, char* out, int8_t type);
 char*   grantGetMachineId();
diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index 6ab06d06a3..0256a496df 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -558,6 +558,7 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_GRANT_GEN_IVLD_KEY            TAOS_DEF_ERROR_CODE(0, 0x0812)
 #define TSDB_CODE_GRANT_GEN_APP_LIMIT           TAOS_DEF_ERROR_CODE(0, 0x0813)
 #define TSDB_CODE_GRANT_GEN_ENC_IVLD_KLEN       TAOS_DEF_ERROR_CODE(0, 0x0814)
+#define TSDB_CODE_GRANT_PAR_IVLD_DIST           TAOS_DEF_ERROR_CODE(0, 0x0815)
 
 // sync
 // #define TSDB_CODE_SYN_INVALID_CONFIG         TAOS_DEF_ERROR_CODE(0, 0x0900) // 2.x
diff --git a/source/common/src/systable.c b/source/common/src/systable.c
index 1623d9f062..0b733f7ce8 100644
--- a/source/common/src/systable.c
+++ b/source/common/src/systable.c
@@ -76,6 +76,7 @@ static const SSysDbTableSchema clusterSchema[] = {
     {.name = "create_time", .bytes = 8, .type = TSDB_DATA_TYPE_TIMESTAMP, .sysInfo = true},
     {.name = "version", .bytes = 10 + VARSTR_HEADER_SIZE, .type = TSDB_DATA_TYPE_VARCHAR, .sysInfo = true},
     {.name = "expire_time", .bytes = 8, .type = TSDB_DATA_TYPE_TIMESTAMP, .sysInfo = true},
+    {.name = "machine_ids", .bytes = 100 * (TSDB_MACHINE_ID_LEN + 3) + 2 + VARSTR_HEADER_SIZE, .type= TSDB_DATA_TYPE_VARCHAR, .sysInfo = true},
 };
 
 static const SSysDbTableSchema userDBSchema[] = {
diff --git a/source/dnode/mnode/impl/src/mndCluster.c b/source/dnode/mnode/impl/src/mndCluster.c
index 794f8724c2..5ebfdf858c 100644
--- a/source/dnode/mnode/impl/src/mndCluster.c
+++ b/source/dnode/mnode/impl/src/mndCluster.c
@@ -137,7 +137,7 @@ int64_t mndGetClusterUpTime(SMnode *pMnode) {
 static SSdbRaw *mndClusterActionEncode(SClusterObj *pCluster) {
   terrno = TSDB_CODE_OUT_OF_MEMORY;
 
-  int32_t  nMachineIds = taosArrayGetSize(pCluster->pMachineIds);
+  int16_t  nMachineIds = taosArrayGetSize(pCluster->pMachineIds);
   int32_t  machineSize = sizeof(int16_t) + nMachineIds * sizeof(SMachineId);
   SSdbRaw *pRaw = sdbAllocRaw(SDB_CLUSTER, CLUSTER_VER_NUMBE, sizeof(SClusterObj) + machineSize + CLUSTER_RESERVE_SIZE);
   if (pRaw == NULL) goto _OVER;
@@ -149,7 +149,7 @@ static SSdbRaw *mndClusterActionEncode(SClusterObj *pCluster) {
   SDB_SET_BINARY(pRaw, dataPos, pCluster->name, TSDB_CLUSTER_ID_LEN, _OVER)
   SDB_SET_INT32(pRaw, dataPos, pCluster->upTime, _OVER)
   SDB_SET_INT16(pRaw, dataPos, nMachineIds, _OVER)
-  for (int32_t i = 0; i < nMachineIds; ++i) {
+  for (int16_t i = 0; i < nMachineIds; ++i) {
     SDB_SET_BINARY(pRaw, dataPos, ((SMachineId*)TARRAY_GET_ELEM(pCluster->pMachineIds, i))->id, TSDB_MACHINE_ID_LEN, _OVER)
   }
   SDB_SET_RESERVE(pRaw, dataPos, CLUSTER_RESERVE_SIZE, _OVER)
@@ -203,6 +203,7 @@ static SSdbRow *mndClusterActionDecode(SSdbRaw *pRaw) {
       for (int16_t i = 0; i < nMachineIds; ++i) {
         SDB_GET_BINARY(pRaw, dataPos, ((SMachineId *)TARRAY_GET_ELEM(pCluster->pMachineIds, i))->id,
                        TSDB_MACHINE_ID_LEN, _OVER)
+        ++TARRAY_SIZE(pCluster->pMachineIds);
       }
     }
   }
@@ -232,6 +233,7 @@ static int32_t mndClusterActionInsert(SSdb *pSdb, SClusterObj *pCluster) {
 
 static int32_t mndClusterActionDelete(SSdb *pSdb, SClusterObj *pCluster) {
   mTrace("cluster:%" PRId64 ", perform delete action, row:%p", pCluster->id, pCluster);
+  mndFreeClusterObj(pCluster);
   return 0;
 }
 
@@ -347,6 +349,32 @@ static int32_t mndRetrieveClusters(SRpcMsg *pMsg, SShowObj *pShow, SSDataBlock *
       colDataSetVal(pColInfo, numOfRows, (const char *)&tsExpireTime, false);
     }
 
+    pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
+    int32_t nMachidIds = taosArrayGetSize(pCluster->pMachineIds);
+    char   *pBuf =
+        taosMemoryCalloc(1, (nMachidIds > 0 ? nMachidIds * (TSDB_MACHINE_ID_LEN + 3) : 1) + 2 + VARSTR_HEADER_SIZE);
+    VarDataLenT nPos = 0;
+    if (pBuf) {
+      nPos += VARSTR_HEADER_SIZE;
+      snprintf(pBuf + nPos, 2, "[");
+      ++nPos;
+      for (int32_t i = 0; i < nMachidIds; ++i) {
+        snprintf(pBuf + nPos, TSDB_MACHINE_ID_LEN + 2, "\"%s",
+                 ((SMachineId *)TARRAY_GET_ELEM(pCluster->pMachineIds, i))->id);
+        nPos += TSDB_MACHINE_ID_LEN + 1;
+        snprintf(pBuf + nPos, 3, "\",");
+        nPos += 2;
+      }
+      if (nMachidIds > 0) --nPos;
+      snprintf(pBuf + nPos, 2, "]");
+      ++nPos;
+      *(VarDataLenT *)(pBuf) = nPos - VARSTR_HEADER_SIZE;
+      colDataSetVal(pColInfo, numOfRows, pBuf, false);
+      taosMemoryFree(pBuf);
+    } else {
+      colDataSetNULL(pColInfo, numOfRows);
+    }
+
     sdbRelease(pSdb, pCluster);
     numOfRows++;
   }
diff --git a/source/dnode/mnode/impl/src/mndDnode.c b/source/dnode/mnode/impl/src/mndDnode.c
index e224aceec2..d4f1cfcc19 100644
--- a/source/dnode/mnode/impl/src/mndDnode.c
+++ b/source/dnode/mnode/impl/src/mndDnode.c
@@ -1283,7 +1283,8 @@ static int32_t mndProcessConfigDnodeReq(SRpcMsg *pReq) {
 
     strcpy(dcfgReq.config, "supportvnodes");
     snprintf(dcfgReq.value, TSDB_DNODE_VALUE_LEN, "%d", flag);
-  } else if (strncasecmp(cfgReq.config, "activeCode", 10) == 0 || strncasecmp(cfgReq.config, "cActiveCode", 11) == 0) {
+  } else if (strncasecmp(cfgReq.config, GRANT_ACTIVE_CODE, 10) == 0 ||
+             strncasecmp(cfgReq.config, GRANT_C_ACTIVE_CODE, 11) == 0) {
     int8_t opt = strncasecmp(cfgReq.config, "a", 1) == 0 ? DND_ACTIVE_CODE : DND_CONN_ACTIVE_CODE;
     int8_t index = opt == DND_ACTIVE_CODE ? 10 : 11;
     if (' ' != cfgReq.config[index] && 0 != cfgReq.config[index]) {
@@ -1301,7 +1302,7 @@ static int32_t mndProcessConfigDnodeReq(SRpcMsg *pReq) {
       goto _err_out;
     }
 
-    strcpy(dcfgReq.config, opt == DND_ACTIVE_CODE ? "activeCode" : "cActiveCode");
+    strcpy(dcfgReq.config, opt == DND_ACTIVE_CODE ? GRANT_ACTIVE_CODE : GRANT_C_ACTIVE_CODE);
     snprintf(dcfgReq.value, TSDB_DNODE_VALUE_LEN, "%s", cfgReq.value);
 
     if (mndConfigDnode(pMnode, pReq, &cfgReq, opt) != 0) {
diff --git a/source/dnode/mnode/sdb/src/sdbHash.c b/source/dnode/mnode/sdb/src/sdbHash.c
index df5c399da8..5f275f912d 100644
--- a/source/dnode/mnode/sdb/src/sdbHash.c
+++ b/source/dnode/mnode/sdb/src/sdbHash.c
@@ -180,7 +180,7 @@ static int32_t sdbInsertRow(SSdb *pSdb, SHashObj *hash, SSdbRaw *pRaw, SSdbRow *
     pSdb->maxId[pRow->type] = TMAX(pSdb->maxId[pRow->type], *((int32_t *)pRow->pObj));
   }
   if (pSdb->keyTypes[pRow->type] == SDB_KEY_INT64) {
-    pSdb->maxId[pRow->type] = TMAX(pSdb->maxId[pRow->type], *((int32_t *)pRow->pObj));
+    pSdb->maxId[pRow->type] = TMAX(pSdb->maxId[pRow->type], *((int64_t *)pRow->pObj));
   }
   pSdb->tableVer[pRow->type]++;
 
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index cc6647e463..8847b7d894 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -445,6 +445,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_GRANT_PAR_DEC_IVLD_KLEN,      "Invalid klen to decod
 TAOS_DEFINE_ERROR(TSDB_CODE_GRANT_GEN_IVLD_KEY,           "Invalid key to gen active code")
 TAOS_DEFINE_ERROR(TSDB_CODE_GRANT_GEN_APP_LIMIT,          "Limited app num to gen active code")
 TAOS_DEFINE_ERROR(TSDB_CODE_GRANT_GEN_ENC_IVLD_KLEN,      "Invalid klen to encode active code")
+TAOS_DEFINE_ERROR(TSDB_CODE_GRANT_PAR_IVLD_DIST,          "Invalid dist to parse active code")
 
 // sync
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_TIMEOUT,                  "Sync timeout")