diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index 9407ce5efc..f47f895897 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -614,7 +614,6 @@ typedef struct {
 typedef struct {
   int32_t vgId;
   int8_t  role;
-  int8_t  align[3];
   int64_t totalStorage;
   int64_t compStorage;
   int64_t pointsWritten;
@@ -622,27 +621,22 @@ typedef struct {
 } SVnodeLoad;
 
 typedef struct {
-  int32_t    num;
-  SVnodeLoad data[];
-} SVnodeLoads;
-
-typedef struct {
-  int32_t     sver;
+  int32_t     mver;  // msg version
+  int32_t     sver;  // software version
+  int64_t     dver;  // dnode table version in sdb
   int32_t     dnodeId;
   int64_t     clusterId;
-  int64_t     dver;
   int64_t     rebootTime;
   int64_t     updateTime;
   int32_t     numOfCores;
   int32_t     numOfSupportVnodes;
   char        dnodeEp[TSDB_EP_LEN];
   SClusterCfg clusterCfg;
-  SVnodeLoads vnodeLoads;
+  SArray*     pVloads;  // array of SVnodeLoad
 } SStatusReq;
 
-typedef struct {
-  int32_t reserved;
-} STransReq;
+int32_t tSerializeSStatusReq(void** buf, SStatusReq* pReq);
+void*   tDeserializeSStatusReq(void* buf, SStatusReq* pReq);
 
 typedef struct {
   int32_t dnodeId;
@@ -652,21 +646,23 @@ typedef struct {
 typedef struct {
   int32_t  id;
   int8_t   isMnode;
-  int8_t   align;
   SEp      ep;
 } SDnodeEp;
 
 typedef struct {
-  int32_t  num;
-  SDnodeEp eps[];
-} SDnodeEps;
-
-typedef struct {
+  int32_t   mver;
   int64_t   dver;
   SDnodeCfg dnodeCfg;
-  SDnodeEps dnodeEps;
+  SArray*   pDnodeEps;  // Array of SDnodeEp
 } SStatusRsp;
 
+int32_t tSerializeSStatusRsp(void** buf, SStatusRsp* pRsp);
+void*   tDeserializeSStatusRsp(void* buf, SStatusRsp* pRsp);
+
+typedef struct {
+  int32_t mver;
+} STransReq;
+
 typedef struct {
   int32_t  id;
   uint16_t port;                 // node sync Port
@@ -1207,8 +1203,6 @@ typedef struct {
 
 int32_t tSerializeSVCreateTbReq(void** buf, SVCreateTbReq* pReq);
 void*   tDeserializeSVCreateTbReq(void* buf, SVCreateTbReq* pReq);
-int32_t tSerializeSVCreateTbRsp(void** buf, SVCreateTbRsp* pRsp);
-void*   tDeserializeSVCreateTbRsp(void* buf, SVCreateTbRsp* pRsp);
 
 typedef struct {
   uint64_t ver;  // use a general definition
@@ -1220,8 +1214,6 @@ typedef struct {
 
 int32_t tSerializeSVCreateTbBatchReq(void** buf, SVCreateTbBatchReq* pReq);
 void*   tDeserializeSVCreateTbBatchReq(void* buf, SVCreateTbBatchReq* pReq);
-int32_t tSerializeSVCreateTbBatchRsp(void** buf, SVCreateTbBatchRsp* pRsp);
-void*   tDeserializeSVCreateTbBatchRsp(void* buf, SVCreateTbBatchRsp* pRsp);
 
 typedef struct {
   uint64_t ver;
@@ -1235,8 +1227,6 @@ typedef struct {
 
 int32_t tSerializeSVDropTbReq(void** buf, SVDropTbReq* pReq);
 void*   tDeserializeSVDropTbReq(void* buf, SVDropTbReq* pReq);
-int32_t tSerializeSVDropTbRsp(void** buf, SVDropTbRsp* pRsp);
-void*   tDeserializeSVDropTbRsp(void* buf, SVDropTbRsp* pRsp);
 
 typedef struct {
   SMsgHead head;
diff --git a/source/common/src/tmsg.c b/source/common/src/tmsg.c
index e4e9c62137..d9d3cca862 100644
--- a/source/common/src/tmsg.c
+++ b/source/common/src/tmsg.c
@@ -459,3 +459,145 @@ void *tDeserializeSMAlterStbReq(void *buf, SMAltertbReq *pReq) {
 
   return buf;
 }
+
+int32_t tSerializeSStatusReq(void **buf, SStatusReq *pReq) {
+  int32_t tlen = 0;
+
+  // status
+  tlen += taosEncodeFixedI32(buf, pReq->mver);
+  tlen += taosEncodeFixedI32(buf, pReq->sver);
+  tlen += taosEncodeFixedI64(buf, pReq->dver);
+  tlen += taosEncodeFixedI32(buf, pReq->dnodeId);
+  tlen += taosEncodeFixedI64(buf, pReq->clusterId);
+  tlen += taosEncodeFixedI64(buf, pReq->rebootTime);
+  tlen += taosEncodeFixedI64(buf, pReq->updateTime);
+  tlen += taosEncodeFixedI32(buf, pReq->numOfCores);
+  tlen += taosEncodeFixedI32(buf, pReq->numOfSupportVnodes);
+  tlen += taosEncodeString(buf, pReq->dnodeEp);
+
+  // cluster cfg
+  tlen += taosEncodeFixedI32(buf, pReq->clusterCfg.statusInterval);
+  tlen += taosEncodeFixedI64(buf, pReq->clusterCfg.checkTime);
+  tlen += taosEncodeString(buf, pReq->clusterCfg.timezone);
+  tlen += taosEncodeString(buf, pReq->clusterCfg.locale);
+  tlen += taosEncodeString(buf, pReq->clusterCfg.charset);
+
+  // vnode loads
+  int32_t vlen = (int32_t)taosArrayGetSize(pReq->pVloads);
+  tlen += taosEncodeFixedI32(buf, vlen);
+  for (int32_t i = 0; i < vlen; ++i) {
+    SVnodeLoad *pload = taosArrayGet(pReq->pVloads, i);
+    tlen += taosEncodeFixedI32(buf, pload->vgId);
+    tlen += taosEncodeFixedI8(buf, pload->role);
+    tlen += taosEncodeFixedI64(buf, pload->totalStorage);
+    tlen += taosEncodeFixedI64(buf, pload->compStorage);
+    tlen += taosEncodeFixedI64(buf, pload->pointsWritten);
+    tlen += taosEncodeFixedI64(buf, pload->tablesNum);
+  }
+
+  return tlen;
+}
+
+void *tDeserializeSStatusReq(void *buf, SStatusReq *pReq) {
+  // status
+  buf = taosDecodeFixedI32(buf, &pReq->mver);
+  buf = taosDecodeFixedI32(buf, &pReq->sver);
+  buf = taosDecodeFixedI64(buf, &pReq->dver);
+  buf = taosDecodeFixedI32(buf, &pReq->dnodeId);
+  buf = taosDecodeFixedI64(buf, &pReq->clusterId);
+  buf = taosDecodeFixedI64(buf, &pReq->rebootTime);
+  buf = taosDecodeFixedI64(buf, &pReq->updateTime);
+  buf = taosDecodeFixedI32(buf, &pReq->numOfCores);
+  buf = taosDecodeFixedI32(buf, &pReq->numOfSupportVnodes);
+  buf = taosDecodeStringTo(buf, pReq->dnodeEp);
+
+  // cluster cfg
+  buf = taosDecodeFixedI32(buf, &pReq->clusterCfg.statusInterval);
+  buf = taosDecodeFixedI64(buf, &pReq->clusterCfg.checkTime);
+  buf = taosDecodeStringTo(buf, pReq->clusterCfg.timezone);
+  buf = taosDecodeStringTo(buf, pReq->clusterCfg.locale);
+  buf = taosDecodeStringTo(buf, pReq->clusterCfg.charset);
+
+  // vnode loads
+  int32_t vlen = 0;
+  buf = taosDecodeFixedI32(buf, &vlen);
+  pReq->pVloads = taosArrayInit(vlen, sizeof(SVnodeLoad));
+  if (pReq->pVloads == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return NULL;
+  }
+
+  for (int32_t i = 0; i < vlen; ++i) {
+    SVnodeLoad vload = {0};
+    buf = taosDecodeFixedI32(buf, &vload.vgId);
+    buf = taosDecodeFixedI8(buf, &vload.role);
+    buf = taosDecodeFixedI64(buf, &vload.totalStorage);
+    buf = taosDecodeFixedI64(buf, &vload.compStorage);
+    buf = taosDecodeFixedI64(buf, &vload.pointsWritten);
+    buf = taosDecodeFixedI64(buf, &vload.tablesNum);
+    if (taosArrayPush(pReq->pVloads, &vload) == NULL) {
+      terrno = TSDB_CODE_OUT_OF_MEMORY;
+      return NULL;
+    }
+  }
+
+  return buf;
+}
+
+int32_t tSerializeSStatusRsp(void **buf, SStatusRsp *pRsp) {
+  int32_t tlen = 0;
+
+  // status
+  tlen += taosEncodeFixedI32(buf, pRsp->mver);
+  tlen += taosEncodeFixedI64(buf, pRsp->dver);
+
+  // dnode cfg
+  tlen += taosEncodeFixedI32(buf, pRsp->dnodeCfg.dnodeId);
+  tlen += taosEncodeFixedI64(buf, pRsp->dnodeCfg.clusterId);
+
+  // dnode eps
+  int32_t dlen = (int32_t)taosArrayGetSize(pRsp->pDnodeEps);
+  tlen += taosEncodeFixedI32(buf, dlen);
+  for (int32_t i = 0; i < dlen; ++i) {
+    SDnodeEp *pDnodeEp = taosArrayGet(pRsp->pDnodeEps, i);
+    tlen += taosEncodeFixedI32(buf, pDnodeEp->id);
+    tlen += taosEncodeFixedI8(buf, pDnodeEp->isMnode);
+    tlen += taosEncodeString(buf, pDnodeEp->ep.fqdn);
+    tlen += taosEncodeFixedU16(buf, pDnodeEp->ep.port);
+  }
+
+  return tlen;
+}
+
+void *tDeserializeSStatusRsp(void *buf, SStatusRsp *pRsp) {
+  // status
+  buf = taosDecodeFixedI32(buf, &pRsp->mver);
+  buf = taosDecodeFixedI64(buf, &pRsp->dver);
+
+  // cluster cfg
+  buf = taosDecodeFixedI32(buf, &pRsp->dnodeCfg.dnodeId);
+  buf = taosDecodeFixedI64(buf, &pRsp->dnodeCfg.clusterId);
+
+  // dnode eps
+  int32_t dlen = 0;
+  buf = taosDecodeFixedI32(buf, &dlen);
+  pRsp->pDnodeEps = taosArrayInit(dlen, sizeof(SDnodeEp));
+  if (pRsp->pDnodeEps == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    return NULL;
+  }
+
+  for (int32_t i = 0; i < dlen; ++i) {
+    SDnodeEp dnodeEp = {0};
+    buf = taosDecodeFixedI32(buf, &dnodeEp.id);
+    buf = taosDecodeFixedI8(buf, &dnodeEp.isMnode);
+    buf = taosDecodeStringTo(buf, dnodeEp.ep.fqdn);
+    buf = taosDecodeFixedU16(buf, &dnodeEp.ep.port);
+    if (taosArrayPush(pRsp->pDnodeEps, &dnodeEp) == NULL) {
+      terrno = TSDB_CODE_OUT_OF_MEMORY;
+      return NULL;
+    }
+  }
+
+  return buf;
+}
diff --git a/source/dnode/mgmt/impl/inc/dndEnv.h b/source/dnode/mgmt/impl/inc/dndEnv.h
index 4214dca11d..9eff246323 100644
--- a/source/dnode/mgmt/impl/inc/dndEnv.h
+++ b/source/dnode/mgmt/impl/inc/dndEnv.h
@@ -55,7 +55,7 @@ typedef struct {
   SEpSet       mnodeEpSet;
   char        *file;
   SHashObj    *dnodeHash;
-  SDnodeEps   *dnodeEps;
+  SArray      *pDnodeEps;
   pthread_t   *threadId;
   SRWLatch     latch;
   SDnodeWorker mgmtWorker;
diff --git a/source/dnode/mgmt/impl/inc/dndVnodes.h b/source/dnode/mgmt/impl/inc/dndVnodes.h
index f5177778ec..895e94060f 100644
--- a/source/dnode/mgmt/impl/inc/dndVnodes.h
+++ b/source/dnode/mgmt/impl/inc/dndVnodes.h
@@ -23,7 +23,7 @@ extern "C" {
 
 int32_t dndInitVnodes(SDnode *pDnode);
 void    dndCleanupVnodes(SDnode *pDnode);
-void    dndGetVnodeLoads(SDnode *pDnode, SVnodeLoads *pVloads);
+void    dndGetVnodeLoads(SDnode *pDnode, SArray *pLoads);
 void    dndProcessVnodeWriteMsg(SDnode *pDnode, SRpcMsg *pMsg, SEpSet *pEpSet);
 void    dndProcessVnodeSyncMsg(SDnode *pDnode, SRpcMsg *pMsg, SEpSet *pEpSet);
 void    dndProcessVnodeQueryMsg(SDnode *pDnode, SRpcMsg *pMsg, SEpSet *pEpSet);
diff --git a/source/dnode/mgmt/impl/src/dndMgmt.c b/source/dnode/mgmt/impl/src/dndMgmt.c
index 0674d719b9..41dd54a0ff 100644
--- a/source/dnode/mgmt/impl/src/dndMgmt.c
+++ b/source/dnode/mgmt/impl/src/dndMgmt.c
@@ -113,35 +113,31 @@ static void dndUpdateMnodeEpSet(SDnode *pDnode, SEpSet *pEpSet) {
 static void dndPrintDnodes(SDnode *pDnode) {
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
 
-  dDebug("print dnode ep list, num:%d", pMgmt->dnodeEps->num);
-  for (int32_t i = 0; i < pMgmt->dnodeEps->num; i++) {
-    SDnodeEp *pEp = &pMgmt->dnodeEps->eps[i];
+  int32_t numOfEps = (int32_t)taosArrayGetSize(pMgmt->pDnodeEps);
+  dDebug("print dnode ep list, num:%d", numOfEps);
+  for (int32_t i = 0; i < numOfEps; i++) {
+    SDnodeEp *pEp = taosArrayGet(pMgmt->pDnodeEps, i);
     dDebug("dnode:%d, fqdn:%s port:%u isMnode:%d", pEp->id, pEp->ep.fqdn, pEp->ep.port, pEp->isMnode);
   }
 }
 
-static void dndResetDnodes(SDnode *pDnode, SDnodeEps *pDnodeEps) {
+static void dndResetDnodes(SDnode *pDnode, SArray *pDnodeEps) {
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
 
-  int32_t size = sizeof(SDnodeEps) + pDnodeEps->num * sizeof(SDnodeEp);
-  if (pDnodeEps->num > pMgmt->dnodeEps->num) {
-    SDnodeEps *tmp = calloc(1, size);
-    if (tmp == NULL) return;
-
-    tfree(pMgmt->dnodeEps);
-    pMgmt->dnodeEps = tmp;
-  }
-
-  if (pMgmt->dnodeEps != pDnodeEps) {
-    memcpy(pMgmt->dnodeEps, pDnodeEps, size);
+  if (pMgmt->pDnodeEps != pDnodeEps) {
+    SArray *tmp = pMgmt->pDnodeEps;
+    pMgmt->pDnodeEps = taosArrayDup(pDnodeEps);
+    taosArrayDestroy(tmp);
   }
 
   pMgmt->mnodeEpSet.inUse = 0;
   pMgmt->mnodeEpSet.numOfEps = 0;
 
   int32_t mIndex = 0;
-  for (int32_t i = 0; i < pMgmt->dnodeEps->num; i++) {
-    SDnodeEp *pDnodeEp = &pMgmt->dnodeEps->eps[i];
+  int32_t numOfEps = (int32_t)taosArrayGetSize(pDnodeEps);
+
+  for (int32_t i = 0; i < numOfEps; i++) {
+    SDnodeEp *pDnodeEp = taosArrayGet(pDnodeEps, i);
     if (!pDnodeEp->isMnode) continue;
     if (mIndex >= TSDB_MAX_REPLICA) continue;
     pMgmt->mnodeEpSet.numOfEps++;
@@ -150,8 +146,8 @@ static void dndResetDnodes(SDnode *pDnode, SDnodeEps *pDnodeEps) {
     mIndex++;
   }
 
-  for (int32_t i = 0; i < pMgmt->dnodeEps->num; ++i) {
-    SDnodeEp *pDnodeEp = &pMgmt->dnodeEps->eps[i];
+  for (int32_t i = 0; i < numOfEps; i++) {
+    SDnodeEp *pDnodeEp = taosArrayGet(pDnodeEps, i);
     taosHashPut(pMgmt->dnodeHash, &pDnodeEp->id, sizeof(int32_t), pDnodeEp, sizeof(SDnodeEp));
   }
 
@@ -178,6 +174,12 @@ static bool dndIsEpChanged(SDnode *pDnode, int32_t dnodeId, char *pEp) {
 static int32_t dndReadDnodes(SDnode *pDnode) {
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
 
+  pMgmt->pDnodeEps = taosArrayInit(1, sizeof(SDnodeEp));
+  if (pMgmt->pDnodeEps == NULL) {
+    dError("failed to calloc dnodeEp array since %s", strerror(errno));
+    goto PRASE_DNODE_OVER;
+  }
+
   int32_t code = TSDB_CODE_DND_DNODE_READ_FILE_ERROR;
   int32_t len = 0;
   int32_t maxLen = 256 * 1024;
@@ -238,18 +240,11 @@ static int32_t dndReadDnodes(SDnode *pDnode) {
     goto PRASE_DNODE_OVER;
   }
 
-  pMgmt->dnodeEps = calloc(1, numOfDnodes * sizeof(SDnodeEp) + sizeof(SDnodeEps));
-  if (pMgmt->dnodeEps == NULL) {
-    dError("failed to calloc dnodeEpList since %s", strerror(errno));
-    goto PRASE_DNODE_OVER;
-  }
-  pMgmt->dnodeEps->num = numOfDnodes;
-
   for (int32_t i = 0; i < numOfDnodes; ++i) {
     cJSON *node = cJSON_GetArrayItem(dnodes, i);
     if (node == NULL) break;
 
-    SDnodeEp *pDnodeEp = &pMgmt->dnodeEps->eps[i];
+    SDnodeEp dnodeEp = {0};
 
     cJSON *did = cJSON_GetObjectItem(node, "id");
     if (!did || did->type != cJSON_Number) {
@@ -257,14 +252,14 @@ static int32_t dndReadDnodes(SDnode *pDnode) {
       goto PRASE_DNODE_OVER;
     }
 
-    pDnodeEp->id = dnodeId->valueint;
+    dnodeEp.id = dnodeId->valueint;
 
     cJSON *dnodeFqdn = cJSON_GetObjectItem(node, "fqdn");
     if (!dnodeFqdn || dnodeFqdn->type != cJSON_String || dnodeFqdn->valuestring == NULL) {
       dError("failed to read %s since dnodeFqdn not found", pMgmt->file);
       goto PRASE_DNODE_OVER;
     }
-    tstrncpy(pDnodeEp->ep.fqdn, dnodeFqdn->valuestring, TSDB_FQDN_LEN);
+    tstrncpy(dnodeEp.ep.fqdn, dnodeFqdn->valuestring, TSDB_FQDN_LEN);
 
     cJSON *dnodePort = cJSON_GetObjectItem(node, "port");
     if (!dnodePort || dnodePort->type != cJSON_Number) {
@@ -272,14 +267,16 @@ static int32_t dndReadDnodes(SDnode *pDnode) {
       goto PRASE_DNODE_OVER;
     }
 
-    pDnodeEp->ep.port = dnodePort->valueint;
+    dnodeEp.ep.port = dnodePort->valueint;
 
     cJSON *isMnode = cJSON_GetObjectItem(node, "isMnode");
     if (!isMnode || isMnode->type != cJSON_Number) {
       dError("failed to read %s since isMnode not found", pMgmt->file);
       goto PRASE_DNODE_OVER;
     }
-    pDnodeEp->isMnode = isMnode->valueint;
+    dnodeEp.isMnode = isMnode->valueint;
+
+    taosArrayPush(pMgmt->pDnodeEps, &dnodeEp);
   }
 
   code = 0;
@@ -296,15 +293,14 @@ PRASE_DNODE_OVER:
     return -1;
   }
 
-  if (pMgmt->dnodeEps == NULL) {
-    pMgmt->dnodeEps = calloc(1, sizeof(SDnodeEps) + sizeof(SDnodeEp));
-    pMgmt->dnodeEps->num = 1;
-    pMgmt->dnodeEps->eps[0].isMnode = 1;
-
-    taosGetFqdnPortFromEp(pDnode->cfg.firstEp, &(pMgmt->dnodeEps->eps[0].ep));
+  if (taosArrayGetSize(pMgmt->pDnodeEps) == 0) {
+    SDnodeEp dnodeEp = {0};
+    dnodeEp.isMnode = 1;
+    taosGetFqdnPortFromEp(pDnode->cfg.firstEp, &dnodeEp.ep);
+    taosArrayPush(pMgmt->pDnodeEps, &dnodeEp);
   }
 
-  dndResetDnodes(pDnode, pMgmt->dnodeEps);
+  dndResetDnodes(pDnode, pMgmt->pDnodeEps);
 
   terrno = 0;
   return 0;
@@ -329,13 +325,15 @@ static int32_t dndWriteDnodes(SDnode *pDnode) {
   len += snprintf(content + len, maxLen - len, "  \"clusterId\": \"%" PRId64 "\",\n", pMgmt->clusterId);
   len += snprintf(content + len, maxLen - len, "  \"dropped\": %d,\n", pMgmt->dropped);
   len += snprintf(content + len, maxLen - len, "  \"dnodes\": [{\n");
-  for (int32_t i = 0; i < pMgmt->dnodeEps->num; ++i) {
-    SDnodeEp *pDnodeEp = &pMgmt->dnodeEps->eps[i];
+
+  int32_t numOfEps = (int32_t)taosArrayGetSize(pMgmt->pDnodeEps);
+  for (int32_t i = 0; i < numOfEps; ++i) {
+    SDnodeEp *pDnodeEp = taosArrayGet(pMgmt->pDnodeEps, i);
     len += snprintf(content + len, maxLen - len, "    \"id\": %d,\n", pDnodeEp->id);
     len += snprintf(content + len, maxLen - len, "    \"fqdn\": \"%s\",\n", pDnodeEp->ep.fqdn);
     len += snprintf(content + len, maxLen - len, "    \"port\": %u,\n", pDnodeEp->ep.port);
     len += snprintf(content + len, maxLen - len, "    \"isMnode\": %d\n", pDnodeEp->isMnode);
-    if (i < pMgmt->dnodeEps->num - 1) {
+    if (i < numOfEps - 1) {
       len += snprintf(content + len, maxLen - len, "  },{\n");
     } else {
       len += snprintf(content + len, maxLen - len, "  }]\n");
@@ -355,40 +353,39 @@ static int32_t dndWriteDnodes(SDnode *pDnode) {
 }
 
 void dndSendStatusReq(SDnode *pDnode) {
-  int32_t contLen = sizeof(SStatusReq) + TSDB_MAX_VNODES * sizeof(SVnodeLoad);
-
-  SStatusReq *pStatus = rpcMallocCont(contLen);
-  if (pStatus == NULL) {
-    dError("failed to malloc status message");
-    return;
-  }
+  SStatusReq req = {0};
 
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
   taosRLockLatch(&pMgmt->latch);
-  pStatus->sver = htonl(pDnode->env.sver);
-  pStatus->dver = htobe64(pMgmt->dver);
-  pStatus->dnodeId = htonl(pMgmt->dnodeId);
-  pStatus->clusterId = htobe64(pMgmt->clusterId);
-  pStatus->rebootTime = htobe64(pMgmt->rebootTime);
-  pStatus->updateTime = htobe64(pMgmt->updateTime);
-  pStatus->numOfCores = htonl(pDnode->env.numOfCores);
-  pStatus->numOfSupportVnodes = htonl(pDnode->cfg.numOfSupportVnodes);
-  tstrncpy(pStatus->dnodeEp, pDnode->cfg.localEp, TSDB_EP_LEN);
+  req.sver = pDnode->env.sver;
+  req.dver = pMgmt->dver;
+  req.dnodeId = pMgmt->dnodeId;
+  req.clusterId = pMgmt->clusterId;
+  req.rebootTime = pMgmt->rebootTime;
+  req.updateTime = pMgmt->updateTime;
+  req.numOfCores = pDnode->env.numOfCores;
+  req.numOfSupportVnodes = pDnode->cfg.numOfSupportVnodes;
+  memcpy(req.dnodeEp, pDnode->cfg.localEp, TSDB_EP_LEN);
 
-  pStatus->clusterCfg.statusInterval = htonl(pDnode->cfg.statusInterval);
-  pStatus->clusterCfg.checkTime = 0;
+  req.clusterCfg.statusInterval = pDnode->cfg.statusInterval;
+  req.clusterCfg.checkTime = 0;
   char timestr[32] = "1970-01-01 00:00:00.00";
-  (void)taosParseTime(timestr, &pStatus->clusterCfg.checkTime, (int32_t)strlen(timestr), TSDB_TIME_PRECISION_MILLI, 0);
-  pStatus->clusterCfg.checkTime = htonl(pStatus->clusterCfg.checkTime);
-  tstrncpy(pStatus->clusterCfg.timezone, pDnode->env.timezone, TSDB_TIMEZONE_LEN);
-  tstrncpy(pStatus->clusterCfg.locale, pDnode->env.locale, TSDB_LOCALE_LEN);
-  tstrncpy(pStatus->clusterCfg.charset, pDnode->env.charset, TSDB_LOCALE_LEN);
+  (void)taosParseTime(timestr, &req.clusterCfg.checkTime, (int32_t)strlen(timestr), TSDB_TIME_PRECISION_MILLI, 0);
+  memcpy(req.clusterCfg.timezone, pDnode->env.timezone, TSDB_TIMEZONE_LEN);
+  memcpy(req.clusterCfg.locale, pDnode->env.locale, TSDB_LOCALE_LEN);
+  memcpy(req.clusterCfg.charset, pDnode->env.charset, TSDB_LOCALE_LEN);
   taosRUnLockLatch(&pMgmt->latch);
 
-  dndGetVnodeLoads(pDnode, &pStatus->vnodeLoads);
-  contLen = sizeof(SStatusReq) + pStatus->vnodeLoads.num * sizeof(SVnodeLoad);
+  req.pVloads = taosArrayInit(TSDB_MAX_VNODES, sizeof(SVnodeLoad));
+  dndGetVnodeLoads(pDnode, req.pVloads);
 
-  SRpcMsg rpcMsg = {.pCont = pStatus, .contLen = contLen, .msgType = TDMT_MND_STATUS, .ahandle = (void *)9527};
+  int32_t contLen = tSerializeSStatusReq(NULL, &req);
+  void   *pHead = rpcMallocCont(contLen);
+  void   *pBuf = pHead;
+  tSerializeSStatusReq(&pBuf, &req);
+  taosArrayDestroy(req.pVloads);
+
+  SRpcMsg rpcMsg = {.pCont = pHead, .contLen = contLen, .msgType = TDMT_MND_STATUS, .ahandle = (void *)9527};
   pMgmt->statusSent = 1;
 
   dTrace("pDnode:%p, send status req to mnode", pDnode);
@@ -407,18 +404,20 @@ static void dndUpdateDnodeCfg(SDnode *pDnode, SDnodeCfg *pCfg) {
   }
 }
 
-static void dndUpdateDnodeEps(SDnode *pDnode, SDnodeEps *pDnodeEps) {
-  if (pDnodeEps == NULL || pDnodeEps->num <= 0) return;
+static void dndUpdateDnodeEps(SDnode *pDnode, SArray *pDnodeEps) {
+  int32_t numOfEps = taosArrayGetSize(pDnodeEps);
+  if (numOfEps <= 0) return;
 
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
   taosWLockLatch(&pMgmt->latch);
 
-  if (pDnodeEps->num != pMgmt->dnodeEps->num) {
+  int32_t numOfEpsOld = (int32_t)taosArrayGetSize(pMgmt->pDnodeEps);
+  if (numOfEps != numOfEpsOld) {
     dndResetDnodes(pDnode, pDnodeEps);
     dndWriteDnodes(pDnode);
   } else {
-    int32_t size = pDnodeEps->num * sizeof(SDnodeEp) + sizeof(SDnodeEps);
-    if (memcmp(pMgmt->dnodeEps, pDnodeEps, size) != 0) {
+    int32_t size = numOfEps * sizeof(SDnodeEp);
+    if (memcmp(pMgmt->pDnodeEps->pData, pDnodeEps->pData, size) != 0) {
       dndResetDnodes(pDnode, pDnodeEps);
       dndWriteDnodes(pDnode);
     }
@@ -431,33 +430,21 @@ static void dndProcessStatusRsp(SDnode *pDnode, SRpcMsg *pRsp) {
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
 
   if (pRsp->code != TSDB_CODE_SUCCESS) {
-    pMgmt->statusSent = 0;
     if (pRsp->code == TSDB_CODE_MND_DNODE_NOT_EXIST && !pMgmt->dropped && pMgmt->dnodeId > 0) {
       dInfo("dnode:%d, set to dropped since not exist in mnode", pMgmt->dnodeId);
       pMgmt->dropped = 1;
       dndWriteDnodes(pDnode);
     }
-    return;
-  }
-
-  if (pRsp->pCont != NULL && pRsp->contLen != 0) {
-    SStatusRsp *pStatus = pRsp->pCont;
-    pMgmt->dver = htobe64(pStatus->dver);
-
-    SDnodeCfg *pCfg = &pStatus->dnodeCfg;
-    pCfg->dnodeId = htonl(pCfg->dnodeId);
-    pCfg->clusterId = htobe64(pCfg->clusterId);
-    dndUpdateDnodeCfg(pDnode, pCfg);
-
-    SDnodeEps *pDnodeEps = &pStatus->dnodeEps;
-    pDnodeEps->num = htonl(pDnodeEps->num);
-    for (int32_t i = 0; i < pDnodeEps->num; ++i) {
-      pDnodeEps->eps[i].id = htonl(pDnodeEps->eps[i].id);
-      pDnodeEps->eps[i].ep.port = htons(pDnodeEps->eps[i].ep.port);
+  } else {
+    SStatusRsp statusRsp = {0};
+    if (pRsp->pCont != NULL && pRsp->contLen != 0 && tDeserializeSStatusRsp(pRsp->pCont, &statusRsp) != NULL) {
+      pMgmt->dver = statusRsp.dver;
+      dndUpdateDnodeCfg(pDnode, &statusRsp.dnodeCfg);
+      dndUpdateDnodeEps(pDnode, statusRsp.pDnodeEps);
     }
-
-    dndUpdateDnodeEps(pDnode, pDnodeEps);
+    taosArrayDestroy(statusRsp.pDnodeEps);
   }
+
   pMgmt->statusSent = 0;
 }
 
@@ -572,9 +559,9 @@ void dndCleanupMgmt(SDnode *pDnode) {
   SDnodeMgmt *pMgmt = &pDnode->dmgmt;
   taosWLockLatch(&pMgmt->latch);
 
-  if (pMgmt->dnodeEps != NULL) {
-    free(pMgmt->dnodeEps);
-    pMgmt->dnodeEps = NULL;
+  if (pMgmt->pDnodeEps != NULL) {
+    taosArrayDestroy(pMgmt->pDnodeEps);
+    pMgmt->pDnodeEps = NULL;
   }
 
   if (pMgmt->dnodeHash != NULL) {
diff --git a/source/dnode/mgmt/impl/src/dndVnodes.c b/source/dnode/mgmt/impl/src/dndVnodes.c
index c4d14ef697..78eab3151f 100644
--- a/source/dnode/mgmt/impl/src/dndVnodes.c
+++ b/source/dnode/mgmt/impl/src/dndVnodes.c
@@ -1008,27 +1008,21 @@ void dndCleanupVnodes(SDnode *pDnode) {
   dInfo("dnode-vnodes is cleaned up");
 }
 
-void dndGetVnodeLoads(SDnode *pDnode, SVnodeLoads *pLoads) {
+void dndGetVnodeLoads(SDnode *pDnode, SArray *pLoads) {
   SVnodesMgmt *pMgmt = &pDnode->vmgmt;
 
   taosRLockLatch(&pMgmt->latch);
-  pLoads->num = taosHashGetSize(pMgmt->hash);
 
   int32_t v = 0;
-  void *  pIter = taosHashIterate(pMgmt->hash, NULL);
+  void   *pIter = taosHashIterate(pMgmt->hash, NULL);
   while (pIter) {
     SVnodeObj **ppVnode = pIter;
     if (ppVnode == NULL || *ppVnode == NULL) continue;
 
-    SVnodeObj * pVnode = *ppVnode;
-    SVnodeLoad *pLoad = &pLoads->data[v++];
-
-    vnodeGetLoad(pVnode->pImpl, pLoad);
-    pLoad->vgId = htonl(pLoad->vgId);
-    pLoad->totalStorage = htobe64(pLoad->totalStorage);
-    pLoad->compStorage = htobe64(pLoad->compStorage);
-    pLoad->pointsWritten = htobe64(pLoad->pointsWritten);
-    pLoad->tablesNum = htobe64(pLoad->tablesNum);
+    SVnodeObj *pVnode = *ppVnode;
+    SVnodeLoad vload = {0};
+    vnodeGetLoad(pVnode->pImpl, &vload);
+    taosArrayPush(pLoads, &vload);
 
     pIter = taosHashIterate(pMgmt->hash, pIter);
   }
diff --git a/source/dnode/mnode/impl/src/mndDnode.c b/source/dnode/mnode/impl/src/mndDnode.c
index 3b43cd8081..c7a2724a44 100644
--- a/source/dnode/mnode/impl/src/mndDnode.c
+++ b/source/dnode/mnode/impl/src/mndDnode.c
@@ -244,7 +244,7 @@ bool mndIsDnodeOnline(SMnode *pMnode, SDnodeObj *pDnode, int64_t curMs) {
   return true;
 }
 
-static void mndGetDnodeData(SMnode *pMnode, SDnodeEps *pEps, int32_t maxEps) {
+static void mndGetDnodeData(SMnode *pMnode, SArray *pDnodeEps) {
   SSdb *pSdb = pMnode->pSdb;
 
   int32_t numOfEps = 0;
@@ -253,25 +253,20 @@ static void mndGetDnodeData(SMnode *pMnode, SDnodeEps *pEps, int32_t maxEps) {
     SDnodeObj *pDnode = NULL;
     pIter = sdbFetch(pSdb, SDB_DNODE, pIter, (void **)&pDnode);
     if (pIter == NULL) break;
-    if (numOfEps >= maxEps) {
-      sdbCancelFetch(pSdb, pIter);
-      sdbRelease(pSdb, pDnode);
-      break;
-    }
 
-    SDnodeEp *pEp = &pEps->eps[numOfEps];
-    pEp->id = htonl(pDnode->id);
-    pEp->ep.port = htons(pDnode->port);
-    memcpy(pEp->ep.fqdn, pDnode->fqdn, TSDB_FQDN_LEN);
-    pEp->isMnode = 0;
+    SDnodeEp dnodeEp = {0};
+    dnodeEp.id = pDnode->id;
+    dnodeEp.isMnode = 0;
+    dnodeEp.ep.port = pDnode->port;
+    memcpy(dnodeEp.ep.fqdn, pDnode->fqdn, TSDB_FQDN_LEN);
+
     if (mndIsMnode(pMnode, pDnode->id)) {
-      pEp->isMnode = 1;
+      dnodeEp.isMnode = 1;
     }
-    numOfEps++;
-    sdbRelease(pSdb, pDnode);
-  }
 
-  pEps->num = htonl(numOfEps);
+    sdbRelease(pSdb, pDnode);
+    taosArrayPush(pDnodeEps, &dnodeEp);
+  }
 }
 
 static int32_t mndCheckClusterCfgPara(SMnode *pMnode, const SClusterCfg *pCfg) {
@@ -299,50 +294,29 @@ static int32_t mndCheckClusterCfgPara(SMnode *pMnode, const SClusterCfg *pCfg) {
   return 0;
 }
 
-static void mndParseStatusMsg(SStatusReq *pStatus) {
-  pStatus->sver = htonl(pStatus->sver);
-  pStatus->dver = htobe64(pStatus->dver);
-  pStatus->dnodeId = htonl(pStatus->dnodeId);
-  pStatus->clusterId = htobe64(pStatus->clusterId);
-  pStatus->rebootTime = htobe64(pStatus->rebootTime);
-  pStatus->updateTime = htobe64(pStatus->updateTime);
-  pStatus->numOfCores = htonl(pStatus->numOfCores);
-  pStatus->numOfSupportVnodes = htonl(pStatus->numOfSupportVnodes);
-  pStatus->clusterCfg.statusInterval = htonl(pStatus->clusterCfg.statusInterval);
-  pStatus->clusterCfg.checkTime = htobe64(pStatus->clusterCfg.checkTime);
-  for (int32_t v = 0; v < pStatus->vnodeLoads.num; ++v) {
-    SVnodeLoad *pVload = &pStatus->vnodeLoads.data[v];
-    pVload->vgId = htonl(pVload->vgId);
-    pVload->totalStorage = htobe64(pVload->totalStorage);
-    pVload->compStorage = htobe64(pVload->compStorage);
-    pVload->pointsWritten = htobe64(pVload->pointsWritten);
-    pVload->tablesNum = htobe64(pVload->tablesNum);
-  }
-}
-
 static int32_t mndProcessStatusReq(SMnodeMsg *pReq) {
-  SMnode     *pMnode = pReq->pMnode;
-  SStatusReq *pStatus = pReq->rpcMsg.pCont;
-  SDnodeObj  *pDnode = NULL;
-  int32_t     code = -1;
+  SMnode    *pMnode = pReq->pMnode;
+  SStatusReq statusReq = {0};
+  SDnodeObj *pDnode = NULL;
+  int32_t    code = -1;
 
-  mndParseStatusMsg(pStatus);
+  if (tDeserializeSStatusReq(pReq->rpcMsg.pCont, &statusReq) == NULL) goto PROCESS_STATUS_MSG_OVER;
 
-  if (pStatus->dnodeId == 0) {
-    pDnode = mndAcquireDnodeByEp(pMnode, pStatus->dnodeEp);
+  if (statusReq.dnodeId == 0) {
+    pDnode = mndAcquireDnodeByEp(pMnode, statusReq.dnodeEp);
     if (pDnode == NULL) {
-      mDebug("dnode:%s, not created yet", pStatus->dnodeEp);
+      mDebug("dnode:%s, not created yet", statusReq.dnodeEp);
       terrno = TSDB_CODE_MND_DNODE_NOT_EXIST;
       goto PROCESS_STATUS_MSG_OVER;
     }
   } else {
-    pDnode = mndAcquireDnode(pMnode, pStatus->dnodeId);
+    pDnode = mndAcquireDnode(pMnode, statusReq.dnodeId);
     if (pDnode == NULL) {
-      pDnode = mndAcquireDnodeByEp(pMnode, pStatus->dnodeEp);
+      pDnode = mndAcquireDnodeByEp(pMnode, statusReq.dnodeEp);
       if (pDnode != NULL) {
         pDnode->offlineReason = DND_REASON_DNODE_ID_NOT_MATCH;
       }
-      mError("dnode:%d, %s not exist", pStatus->dnodeId, pStatus->dnodeEp);
+      mError("dnode:%d, %s not exist", statusReq.dnodeId, statusReq.dnodeEp);
       terrno = TSDB_CODE_MND_DNODE_NOT_EXIST;
       goto PROCESS_STATUS_MSG_OVER;
     }
@@ -350,28 +324,28 @@ static int32_t mndProcessStatusReq(SMnodeMsg *pReq) {
 
   int64_t curMs = taosGetTimestampMs();
   bool    online = mndIsDnodeOnline(pMnode, pDnode, curMs);
-  bool    dnodeChanged = (pStatus->dver != sdbGetTableVer(pMnode->pSdb, SDB_DNODE));
-  bool    reboot = (pDnode->rebootTime != pStatus->rebootTime);
+  bool    dnodeChanged = (statusReq.dver != sdbGetTableVer(pMnode->pSdb, SDB_DNODE));
+  bool    reboot = (pDnode->rebootTime != statusReq.rebootTime);
   bool    needCheck = !online || dnodeChanged || reboot;
 
   if (needCheck) {
-    if (pStatus->sver != pMnode->cfg.sver) {
+    if (statusReq.sver != pMnode->cfg.sver) {
       if (pDnode != NULL) {
         pDnode->offlineReason = DND_REASON_VERSION_NOT_MATCH;
       }
-      mError("dnode:%d, status msg version:%d not match cluster:%d", pStatus->dnodeId, pStatus->sver, pMnode->cfg.sver);
+      mError("dnode:%d, status msg version:%d not match cluster:%d", statusReq.dnodeId, statusReq.sver, pMnode->cfg.sver);
       terrno = TSDB_CODE_MND_INVALID_MSG_VERSION;
       goto PROCESS_STATUS_MSG_OVER;
     }
 
-    if (pStatus->dnodeId == 0) {
+    if (statusReq.dnodeId == 0) {
       mDebug("dnode:%d, %s first access, set clusterId %" PRId64, pDnode->id, pDnode->ep, pMnode->clusterId);
     } else {
-      if (pStatus->clusterId != pMnode->clusterId) {
+      if (statusReq.clusterId != pMnode->clusterId) {
         if (pDnode != NULL) {
           pDnode->offlineReason = DND_REASON_CLUSTER_ID_NOT_MATCH;
         }
-        mError("dnode:%d, clusterId %" PRId64 " not match exist %" PRId64, pDnode->id, pStatus->clusterId,
+        mError("dnode:%d, clusterId %" PRId64 " not match exist %" PRId64, pDnode->id, statusReq.clusterId,
                pMnode->clusterId);
         terrno = TSDB_CODE_MND_INVALID_CLUSTER_ID;
         goto PROCESS_STATUS_MSG_OVER;
@@ -382,7 +356,7 @@ static int32_t mndProcessStatusReq(SMnodeMsg *pReq) {
     }
 
     // Verify whether the cluster parameters are consistent when status change from offline to ready
-    int32_t ret = mndCheckClusterCfgPara(pMnode, &pStatus->clusterCfg);
+    int32_t ret = mndCheckClusterCfgPara(pMnode, &statusReq.clusterCfg);
     if (0 != ret) {
       pDnode->offlineReason = ret;
       mError("dnode:%d, cluster cfg inconsistent since:%s", pDnode->id, offlineReason[ret]);
@@ -396,25 +370,30 @@ static int32_t mndProcessStatusReq(SMnodeMsg *pReq) {
       mDebug("dnode:%d, send dnode eps", pDnode->id);
     }
 
-    pDnode->rebootTime = pStatus->rebootTime;
-    pDnode->numOfCores = pStatus->numOfCores;
-    pDnode->numOfSupportVnodes = pStatus->numOfSupportVnodes;
+    pDnode->rebootTime = statusReq.rebootTime;
+    pDnode->numOfCores = statusReq.numOfCores;
+    pDnode->numOfSupportVnodes = statusReq.numOfSupportVnodes;
 
-    int32_t     numOfEps = mndGetDnodeSize(pMnode);
-    int32_t     contLen = sizeof(SStatusRsp) + numOfEps * sizeof(SDnodeEp);
-    SStatusRsp *pRsp = rpcMallocCont(contLen);
-    if (pRsp == NULL) {
+    SStatusRsp statusRsp = {0};
+    statusRsp.dver = sdbGetTableVer(pMnode->pSdb, SDB_DNODE);
+    statusRsp.dnodeCfg.dnodeId = pDnode->id;
+    statusRsp.dnodeCfg.clusterId = pMnode->clusterId;
+    statusRsp.pDnodeEps = taosArrayInit(mndGetDnodeSize(pMnode), sizeof(SDnodeEp));
+    if (statusRsp.pDnodeEps == NULL) {
       terrno = TSDB_CODE_OUT_OF_MEMORY;
       goto PROCESS_STATUS_MSG_OVER;
     }
 
-    pRsp->dver = htobe64(sdbGetTableVer(pMnode->pSdb, SDB_DNODE));
-    pRsp->dnodeCfg.dnodeId = htonl(pDnode->id);
-    pRsp->dnodeCfg.clusterId = htobe64(pMnode->clusterId);
-    mndGetDnodeData(pMnode, &pRsp->dnodeEps, numOfEps);
+    mndGetDnodeData(pMnode, statusRsp.pDnodeEps);
+
+    int32_t contLen = tSerializeSStatusRsp(NULL, &statusRsp);
+    void   *pHead = rpcMallocCont(contLen);
+    void   *pBuf = pHead;
+    tSerializeSStatusRsp(&pBuf, &statusRsp);
+    taosArrayDestroy(statusRsp.pDnodeEps);
 
     pReq->contLen = contLen;
-    pReq->pCont = pRsp;
+    pReq->pCont = pHead;
   }
 
   pDnode->lastAccessTime = curMs;
@@ -422,6 +401,7 @@ static int32_t mndProcessStatusReq(SMnodeMsg *pReq) {
 
 PROCESS_STATUS_MSG_OVER:
   mndReleaseDnode(pMnode, pDnode);
+  taosArrayDestroy(statusReq.pVloads);
   return code;
 }
 
diff --git a/source/dnode/mnode/impl/src/mndStb.c b/source/dnode/mnode/impl/src/mndStb.c
index 3ddea2290e..2b61ae7176 100644
--- a/source/dnode/mnode/impl/src/mndStb.c
+++ b/source/dnode/mnode/impl/src/mndStb.c
@@ -592,8 +592,8 @@ CREATE_STB_OVER:
   mndReleaseStb(pMnode, pStb);
   mndReleaseStb(pMnode, pTopicStb);
   mndReleaseDb(pMnode, pDb);
-  taosArrayClear(createReq.pColumns);
-  taosArrayClear(createReq.pTags);
+  taosArrayDestroy(createReq.pColumns);
+  taosArrayDestroy(createReq.pTags);
 
   return code;
 }
@@ -1049,7 +1049,7 @@ ALTER_STB_OVER:
 
   mndReleaseStb(pMnode, pStb);
   mndReleaseDb(pMnode, pDb);
-  taosArrayClear(alterReq.pFields);
+  taosArrayDestroy(alterReq.pFields);
 
   return code;
 }
diff --git a/source/libs/transport/src/rpcMain.c b/source/libs/transport/src/rpcMain.c
index d8ef0462fb..f5e9153098 100644
--- a/source/libs/transport/src/rpcMain.c
+++ b/source/libs/transport/src/rpcMain.c
@@ -1383,7 +1383,7 @@ static void rpcSendMsgToPeer(SRpcConn *pConn, void *msg, int msgLen) {
 static void rpcProcessConnError(void *param, void *id) {
   SRpcReqContext *pContext = (SRpcReqContext *)param;
   SRpcInfo *      pRpc = pContext->pRpc;
-  SRpcMsg         rpcMsg;
+  SRpcMsg         rpcMsg = {0};
 
   if (pRpc == NULL) {
     return;