Merge pull request #13087 from taosdata/fix/mnode

fix: error in sync sem

source/dnode/mgmt/node_mgmt/src/dmTransport.c

@@ -64,6 +64,8 @@ static void dmProcessRpcMsg(SDnode *pDnode, SRpcMsg *pRpc, SEpSet *pEpSet) {
   } else if (pRpc->msgType == TDMT_MND_SYSTABLE_RETRIEVE_RSP || pRpc->msgType == TDMT_VND_FETCH_RSP) {
     qWorkerProcessFetchRsp(NULL, NULL, pRpc);
     return;
+  } else if (pRpc->msgType == TDMT_MND_STATUS_RSP && pEpSet != NULL) {
+    dmSetMnodeEpSet(&pDnode->data, pEpSet);
   } else {
   }
 

source/dnode/mgmt/node_util/src/dmEps.c

@@ -326,6 +326,7 @@ void dmGetMnodeEpSetForRedirect(SDnodeData *pData, SRpcMsg *pMsg, SEpSet *pEpSet
 }
 
 void dmSetMnodeEpSet(SDnodeData *pData, SEpSet *pEpSet) {
+  if (memcmp(pEpSet, &pData->mnodeEps, sizeof(SEpSet)) == 0) return;
   taosThreadRwlockWrlock(&pData->lock);
   pData->mnodeEps = *pEpSet;
   taosThreadRwlockUnlock(&pData->lock);

source/dnode/mnode/impl/inc/mndDef.h

@@ -124,6 +124,11 @@ typedef enum {
   TRN_POLICY_RETRY = 1,
 } ETrnPolicy;
 
+typedef enum {
+  TRN_EXEC_PARALLEL = 0,
+  TRN_EXEC_ONE_BY_ONE = 1,
+} ETrnExecType;
+
 typedef enum {
   DND_REASON_ONLINE = 0,
   DND_REASON_STATUS_MSG_TIMEOUT,
@@ -152,6 +157,7 @@ typedef struct {
   ETrnStage      stage;
   ETrnPolicy     policy;
   ETrnType       type;
+  ETrnExecType   parallel;
   int32_t        code;
   int32_t        failedTimes;
   SRpcHandleInfo rpcInfo;

source/dnode/mnode/impl/inc/mndInt.h

@@ -81,6 +81,7 @@ typedef struct {
   bool       standby;
   bool       restored;
   int32_t    errCode;
+  int32_t    transId;
 } SSyncMgmt;
 
 typedef struct {

source/dnode/mnode/impl/inc/mndSync.h

@@ -25,7 +25,7 @@ extern "C" {
 int32_t mndInitSync(SMnode *pMnode);
 void    mndCleanupSync(SMnode *pMnode);
 bool    mndIsMaster(SMnode *pMnode);
-int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw);
+int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw, int32_t transId);
 void    mndSyncStart(SMnode *pMnode);
 void    mndSyncStop(SMnode *pMnode);
 

source/dnode/mnode/impl/inc/mndTrans.h

@@ -57,6 +57,7 @@ int32_t mndTransAppendUndoAction(STrans *pTrans, STransAction *pAction);
 void    mndTransSetRpcRsp(STrans *pTrans, void *pCont, int32_t contLen);
 void    mndTransSetCb(STrans *pTrans, ETrnFuncType startFunc, ETrnFuncType stopFunc, void *param, int32_t paramLen);
 void    mndTransSetDbInfo(STrans *pTrans, SDbObj *pDb);
+void    mndTransSetExecOneByOne(STrans *pTrans);
 
 int32_t mndTransPrepare(SMnode *pMnode, STrans *pTrans);
 void    mndTransProcessRsp(SRpcMsg *pRsp);

source/dnode/mnode/impl/src/mndMnode.c

@@ -313,16 +313,16 @@ static int32_t mndSetCreateMnodeRedoActions(SMnode *pMnode, STrans *pTrans, SDno
   memcpy(createEpset.eps[0].fqdn, pDnode->fqdn, TSDB_FQDN_LEN);
 
   {
-    int32_t contLen = tSerializeSDCreateMnodeReq(NULL, 0, &alterReq);
+    int32_t contLen = tSerializeSDCreateMnodeReq(NULL, 0, &createReq);
     void   *pReq = taosMemoryMalloc(contLen);
-    tSerializeSDCreateMnodeReq(pReq, contLen, &alterReq);
+    tSerializeSDCreateMnodeReq(pReq, contLen, &createReq);
 
     STransAction action = {
-        .epSet = alterEpset,
+        .epSet = createEpset,
         .pCont = pReq,
         .contLen = contLen,
-        .msgType = TDMT_DND_ALTER_MNODE,
-        .acceptableCode = 0,
+        .msgType = TDMT_DND_CREATE_MNODE,
+        .acceptableCode = TSDB_CODE_NODE_ALREADY_DEPLOYED,
     };
 
     if (mndTransAppendRedoAction(pTrans, &action) != 0) {
@@ -332,16 +332,16 @@ static int32_t mndSetCreateMnodeRedoActions(SMnode *pMnode, STrans *pTrans, SDno
   }
 
   {
-    int32_t contLen = tSerializeSDCreateMnodeReq(NULL, 0, &createReq);
+    int32_t contLen = tSerializeSDCreateMnodeReq(NULL, 0, &alterReq);
     void   *pReq = taosMemoryMalloc(contLen);
-    tSerializeSDCreateMnodeReq(pReq, contLen, &createReq);
+    tSerializeSDCreateMnodeReq(pReq, contLen, &alterReq);
 
     STransAction action = {
-        .epSet = createEpset,
+        .epSet = alterEpset,
         .pCont = pReq,
         .contLen = contLen,
-        .msgType = TDMT_DND_CREATE_MNODE,
-        .acceptableCode = TSDB_CODE_NODE_ALREADY_DEPLOYED,
+        .msgType = TDMT_DND_ALTER_MNODE,
+        .acceptableCode = 0,
     };
 
     if (mndTransAppendRedoAction(pTrans, &action) != 0) {
@@ -365,6 +365,7 @@ static int32_t mndCreateMnode(SMnode *pMnode, SRpcMsg *pReq, SDnodeObj *pDnode,
   if (pTrans == NULL) goto _OVER;
 
   mDebug("trans:%d, used to create mnode:%d", pTrans->id, pCreate->dnodeId);
+  mndTransSetExecOneByOne(pTrans);
   if (mndSetCreateMnodeRedoLogs(pMnode, pTrans, &mnodeObj) != 0) goto _OVER;
   if (mndSetCreateMnodeCommitLogs(pMnode, pTrans, &mnodeObj) != 0) goto _OVER;
   if (mndSetCreateMnodeRedoActions(pMnode, pTrans, pDnode, &mnodeObj) != 0) goto _OVER;
@@ -536,7 +537,7 @@ static int32_t mndDropMnode(SMnode *pMnode, SRpcMsg *pReq, SMnodeObj *pObj) {
   if (pTrans == NULL) goto _OVER;
 
   mDebug("trans:%d, used to drop mnode:%d", pTrans->id, pObj->id);
-
+  mndTransSetExecOneByOne(pTrans);
   if (mndSetDropMnodeRedoLogs(pMnode, pTrans, pObj) != 0) goto _OVER;
   if (mndSetDropMnodeCommitLogs(pMnode, pTrans, pObj) != 0) goto _OVER;
   if (mndSetDropMnodeRedoActions(pMnode, pTrans, pObj->pDnode, pObj) != 0) goto _OVER;
@@ -701,14 +702,17 @@ static int32_t mndProcessAlterMnodeReq(SRpcMsg *pReq) {
     }
   }
 
+  mTrace("trans:-1, sync reconfig will be proposed");
+
   SSyncMgmt *pMgmt = &pMnode->syncMgmt;
   pMgmt->standby = 0;
   int32_t code = syncReconfig(pMgmt->sync, &cfg);
   if (code != 0) {
-    mError("failed to alter mnode sync since %s", terrstr());
+    mError("trans:-1, failed to propose sync reconfig since %s", terrstr());
     return code;
   } else {
     pMgmt->errCode = 0;
+    pMgmt->transId = -1;
     tsem_wait(&pMgmt->syncSem);
     mInfo("alter mnode sync result:%s", tstrerror(pMgmt->errCode));
     terrno = pMgmt->errCode;

source/dnode/mnode/impl/src/mndSma.c

@@ -507,6 +507,7 @@ static int32_t mndCreateSma(SMnode *pMnode, SRpcMsg *pReq, SMCreateSmaReq *pCrea
 
   mDebug("trans:%d, used to create sma:%s", pTrans->id, pCreate->name);
   mndTransSetDbInfo(pTrans, pDb);
+  mndTransSetExecOneByOne(pTrans);
 
   if (mndSetCreateSmaRedoLogs(pMnode, pTrans, &smaObj) != 0) goto _OVER;
   if (mndSetCreateSmaVgroupRedoLogs(pMnode, pTrans, &streamObj.fixedSinkVg) != 0) goto _OVER;

source/dnode/mnode/impl/src/mndSync.c

@@ -28,16 +28,26 @@ int32_t mndSyncEqMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) {
 int32_t mndSyncSendMsg(const SEpSet *pEpSet, SRpcMsg *pMsg) { return tmsgSendReq(pEpSet, pMsg); }
 
 void mndSyncCommitMsg(struct SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
-  SMnode  *pMnode = pFsm->data;
-  SSdbRaw *pRaw = pMsg->pCont;
-
-  mTrace("raw:%p, apply to sdb, ver:%" PRId64 " term:%" PRId64 " role:%s", pRaw, cbMeta.index, cbMeta.term,
-         syncStr(cbMeta.state));
-  sdbWriteWithoutFree(pMnode->pSdb, pRaw);
-  sdbSetApplyIndex(pMnode->pSdb, cbMeta.index);
-  sdbSetApplyTerm(pMnode->pSdb, cbMeta.term);
-  if (cbMeta.state == TAOS_SYNC_STATE_LEADER) {
-    tsem_post(&pMnode->syncMgmt.syncSem);
+  SMnode    *pMnode = pFsm->data;
+  SSyncMgmt *pMgmt = &pMnode->syncMgmt;
+  SSdbRaw   *pRaw = pMsg->pCont;
+
+  int32_t transId = sdbGetIdFromRaw(pRaw);
+  pMgmt->errCode = cbMeta.code;
+  mTrace("trans:%d, is proposed, savedTransId:%d code:0x%x, ver:%" PRId64 " term:%" PRId64 " role:%s raw:%p", transId,
+         pMgmt->transId, cbMeta.code, cbMeta.index, cbMeta.term, syncStr(cbMeta.state), pRaw);
+
+  if (pMgmt->errCode == 0) {
+    sdbWriteWithoutFree(pMnode->pSdb, pRaw);
+    sdbSetApplyIndex(pMnode->pSdb, cbMeta.index);
+    sdbSetApplyTerm(pMnode->pSdb, cbMeta.term);
+  }
+
+  if (pMgmt->transId == transId) {
+    if (pMgmt->errCode != 0) {
+      mError("trans:%d, failed to propose since %s", transId, tstrerror(pMgmt->errCode));
+    }
+    tsem_post(&pMgmt->syncSem);
   }
 }
 
@@ -78,11 +88,19 @@ int32_t mndSnapshotApply(struct SSyncFSM* pFsm, const SSnapshot* pSnapshot, char
 }
 
 void mndReConfig(struct SSyncFSM *pFsm, SSyncCfg newCfg, SReConfigCbMeta cbMeta) {
-  mInfo("mndReConfig cbMeta.code:%d, cbMeta.currentTerm:%" PRId64 ", cbMeta.term:%" PRId64 ", cbMeta.index:%" PRId64,
-        cbMeta.code, cbMeta.currentTerm, cbMeta.term, cbMeta.index);
-  SMnode *pMnode = pFsm->data;
-  pMnode->syncMgmt.errCode = cbMeta.code;
-  tsem_post(&pMnode->syncMgmt.syncSem);
+  SMnode    *pMnode = pFsm->data;
+  SSyncMgmt *pMgmt = &pMnode->syncMgmt;
+
+  pMgmt->errCode = cbMeta.code;
+  mInfo("trans:-1, sync reconfig is proposed, savedTransId:%d code:0x%x, curTerm:%" PRId64 " term:%" PRId64,
+        pMgmt->transId, cbMeta.code, cbMeta.index, cbMeta.term);
+
+  if (pMgmt->transId == -1) {
+    if (pMgmt->errCode != 0) {
+      mError("trans:-1, failed to propose sync reconfig since %s", tstrerror(pMgmt->errCode));
+    }
+    tsem_post(&pMgmt->syncSem);
+  }
 }
 
 SSyncFSM *mndSyncMakeFsm(SMnode *pMnode) {
@@ -165,15 +183,17 @@ void mndCleanupSync(SMnode *pMnode) {
   memset(pMgmt, 0, sizeof(SSyncMgmt));
 }
 
-int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw) {
+int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw, int32_t transId) {
   SSyncMgmt *pMgmt = &pMnode->syncMgmt;
-  pMgmt->errCode = 0;
-
-  SRpcMsg rsp = {.code = TDMT_MND_APPLY_MSG, .contLen = sdbGetRawTotalSize(pRaw)};
+  SRpcMsg    rsp = {.code = TDMT_MND_APPLY_MSG, .contLen = sdbGetRawTotalSize(pRaw)};
   rsp.pCont = rpcMallocCont(rsp.contLen);
   if (rsp.pCont == NULL) return -1;
   memcpy(rsp.pCont, pRaw, rsp.contLen);
 
+  pMgmt->errCode = 0;
+  pMgmt->transId = transId;
+  mTrace("trans:%d, will be proposed", pMgmt->transId);
+
   const bool isWeak = false;
   int32_t    code = syncPropose(pMgmt->sync, &rsp, isWeak);
   if (code == 0) {
@@ -187,7 +207,11 @@ int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw) {
   }
 
   rpcFreeCont(rsp.pCont);
-  if (code != 0) return code;
+  if (code != 0) {
+    mError("trans:%d, failed to propose, code:0x%x", pMgmt->transId, code);
+    return code;
+  }
+
   return pMgmt->errCode;
 }
 

source/dnode/mnode/impl/src/mndTrans.c

@@ -140,6 +140,7 @@ static SSdbRaw *mndTransActionEncode(STrans *pTrans) {
   SDB_SET_INT16(pRaw, dataPos, stage, _OVER)
   SDB_SET_INT16(pRaw, dataPos, pTrans->policy, _OVER)
   SDB_SET_INT16(pRaw, dataPos, pTrans->type, _OVER)
+  SDB_SET_INT16(pRaw, dataPos, pTrans->parallel, _OVER)
   SDB_SET_INT64(pRaw, dataPos, pTrans->createdTime, _OVER)
   SDB_SET_INT64(pRaw, dataPos, pTrans->dbUid, _OVER)
   SDB_SET_BINARY(pRaw, dataPos, pTrans->dbname, TSDB_DB_FNAME_LEN, _OVER)
@@ -245,12 +246,15 @@ static SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
   int16_t stage = 0;
   int16_t policy = 0;
   int16_t type = 0;
+  int16_t parallel = 0;
   SDB_GET_INT16(pRaw, dataPos, &stage, _OVER)
   SDB_GET_INT16(pRaw, dataPos, &policy, _OVER)
   SDB_GET_INT16(pRaw, dataPos, &type, _OVER)
+  SDB_GET_INT16(pRaw, dataPos, &parallel, _OVER)
   pTrans->stage = stage;
   pTrans->policy = policy;
   pTrans->type = type;
+  pTrans->parallel = parallel;
   SDB_GET_INT64(pRaw, dataPos, &pTrans->createdTime, _OVER)
   SDB_GET_INT64(pRaw, dataPos, &pTrans->dbUid, _OVER)
   SDB_GET_BINARY(pRaw, dataPos, pTrans->dbname, TSDB_DB_FNAME_LEN, _OVER)
@@ -665,6 +669,8 @@ void mndTransSetDbInfo(STrans *pTrans, SDbObj *pDb) {
   memcpy(pTrans->dbname, pDb->name, TSDB_DB_FNAME_LEN);
 }
 
+void mndTransSetExecOneByOne(STrans *pTrans) { pTrans->parallel = TRN_EXEC_ONE_BY_ONE; }
+
 static int32_t mndTransSync(SMnode *pMnode, STrans *pTrans) {
   SSdbRaw *pRaw = mndTransActionEncode(pTrans);
   if (pRaw == NULL) {
@@ -674,7 +680,7 @@ static int32_t mndTransSync(SMnode *pMnode, STrans *pTrans) {
   sdbSetRawStatus(pRaw, SDB_STATUS_READY);
 
   mDebug("trans:%d, sync to other nodes", pTrans->id);
-  int32_t code = mndSyncPropose(pMnode, pRaw);
+  int32_t code = mndSyncPropose(pMnode, pRaw, pTrans->id);
   if (code != 0) {
     mError("trans:%d, failed to sync since %s", pTrans->id, terrstr());
     sdbFreeRaw(pRaw);
@@ -970,7 +976,18 @@ static int32_t mndTransSendActionMsg(SMnode *pMnode, STrans *pTrans, SArray *pAr
   for (int32_t action = 0; action < numOfActions; ++action) {
     STransAction *pAction = taosArrayGet(pArray, action);
     if (pAction == NULL) continue;
-    if (pAction->msgSent) continue;
+
+    if (pAction->msgSent) {
+      if (pAction->msgReceived) {
+        continue;
+      } else {
+        if (pTrans->parallel == TRN_EXEC_ONE_BY_ONE) {
+          break;
+        } else {
+          continue;
+        }
+      }
+    }
 
     int64_t signature = pTrans->id;
     signature = (signature << 32);
@@ -990,6 +1007,9 @@ static int32_t mndTransSendActionMsg(SMnode *pMnode, STrans *pTrans, SArray *pAr
       pAction->msgSent = 1;
       pAction->msgReceived = 0;
       pAction->errCode = 0;
+      if (pTrans->parallel == TRN_EXEC_ONE_BY_ONE) {
+        break;
+      }
     } else {
       pAction->msgSent = 0;
       pAction->msgReceived = 0;

source/dnode/mnode/sdb/inc/sdb.h

@@ -386,6 +386,8 @@ SSdbIter *sdbIterRead(SSdb *pSdb, SSdbIter *iter, char **ppBuf, int32_t *len);
 const char *sdbTableName(ESdbType type);
 void        sdbPrintOper(SSdb *pSdb, SSdbRow *pRow, const char *oper);
 
+int32_t sdbGetIdFromRaw(SSdbRaw *pRaw);
+
 #ifdef __cplusplus
 }
 #endif

source/dnode/mnode/sdb/src/sdbRaw.c

@@ -16,6 +16,11 @@
 #define _DEFAULT_SOURCE
 #include "sdb.h"
 
+int32_t sdbGetIdFromRaw(SSdbRaw *pRaw) {
+  int32_t id = *((int32_t *)(pRaw->pData));
+  return id;
+}
+
 SSdbRaw *sdbAllocRaw(ESdbType type, int8_t sver, int32_t dataLen) {
   SSdbRaw *pRaw = taosMemoryCalloc(1, dataLen + sizeof(SSdbRaw));
   if (pRaw == NULL) {

source/libs/sync/src/syncIndexMgr.c

@@ -60,7 +60,9 @@ void syncIndexMgrSetIndex(SSyncIndexMgr *pSyncIndexMgr, const SRaftId *pRaftId,
       return;
     }
   }
-  assert(0);
+
+  // maybe config change
+  // assert(0);
 }
 
 SyncIndex syncIndexMgrGetIndex(SSyncIndexMgr *pSyncIndexMgr, const SRaftId *pRaftId) {

source/libs/sync/src/syncMain.c

@@ -981,6 +981,7 @@ char* syncNode2SimpleStr(const SSyncNode* pSyncNode) {
 }
 
 void syncNodeUpdateConfig(SSyncNode* pSyncNode, SSyncCfg* newConfig, bool* isDrop) {
+  SSyncCfg oldConfig = pSyncNode->pRaftCfg->cfg;
   pSyncNode->pRaftCfg->cfg = *newConfig;
   int32_t ret = 0;
 
@@ -1014,6 +1015,15 @@ void syncNodeUpdateConfig(SSyncNode* pSyncNode, SSyncCfg* newConfig, bool* isDro
 
   // isDrop
   *isDrop = true;
+  bool IamInOld, IamInNew;
+  for (int i = 0; i < oldConfig.replicaNum; ++i) {
+    if (strcmp((oldConfig.nodeInfo)[i].nodeFqdn, pSyncNode->myNodeInfo.nodeFqdn) == 0 &&
+        (oldConfig.nodeInfo)[i].nodePort == pSyncNode->myNodeInfo.nodePort) {
+      *isDrop = false;
+      break;
+    }
+  }
+
   for (int i = 0; i < newConfig->replicaNum; ++i) {
     if (strcmp((newConfig->nodeInfo)[i].nodeFqdn, pSyncNode->myNodeInfo.nodeFqdn) == 0 &&
         (newConfig->nodeInfo)[i].nodePort == pSyncNode->myNodeInfo.nodePort) {

tests/script/jenkins/basic.txt

@@ -55,7 +55,7 @@
 ./test.sh -f tsim/bnode/basic1.sim
 
 # ---- mnode
-#./test.sh -f tsim/mnode/basic1.sim
+./test.sh -f tsim/mnode/basic1.sim
 ./test.sh -f tsim/mnode/basic2.sim
 
 # ---- show

tests/script/tsim/mnode/basic1.sim

@@ -88,7 +88,7 @@ sql show mnodes
 print $data(1)[0] $data(1)[1] $data(1)[2] 
 print $data(2)[0] $data(2)[1] $data(2)[2] 
 
-if $rows != 2 then 
+if $rows != 1 then 
   return -1
 endi
 if $data(1)[0] != 1 then 
@@ -97,16 +97,16 @@ endi
 if $data(1)[2] != LEADER then 
   return -1
 endi
-if $data(2)[0] != NULL then 
+if $data(2)[0] != null then 
   goto step2
 endi
-if $data(2)[2] != NULL then 
+if $data(2)[2] != null then 
   goto step2
 endi
 
 sleep 2000
 
-print =============== create drop mnodes
+print =============== create mnodes
 sql create mnode on dnode 2
 sql show mnodes
 if $rows != 2 then 

tests/script/tsim/mnode/basic2.sim

@@ -119,9 +119,16 @@ if $data(2)[4] != ready then
 endi
 
 print =============== insert data
-#sql create table db.stb (ts timestamp, c1 int, c2 binary(4)) tags(t1 int, t2 float, t3 binary(16)) comment "abd"
-#sql create table db.ctb using db.stb tags(101, 102, "103")
-#sql insert into db.ctb values(now, 1, "2")
+sql create table db.stb (ts timestamp, c1 int, c2 binary(4)) tags(t1 int, t2 float, t3 binary(16)) comment "abd"
+sql create table db.ctb using db.stb tags(101, 102, "103")
+sql insert into db.ctb values(now, 1, "2")
+
+sql select * from db.ctb
+print $data[0][0] $data[0][1] $data[0][2] $data[0][3] $data[0][4] $data[0][5] $data[0][6]
+
+if $rows != 1 then
+  return -1
+endi
 
 system sh/exec.sh -n dnode1 -s stop
 system sh/exec.sh -n dnode2 -s stop
\ No newline at end of file

tests/script/tsim/mnode/basic3.sim

@@ -15,7 +15,7 @@ $x = 0
 step1: 
 	$x = $x + 1
 	sleep 1000
-	if $x == 20 then
+	if $x == 50 then
 		return -1
 	endi
 sql show dnodes -x step1
@@ -37,7 +37,7 @@ $x = 0
 step2: 
 	$x = $x + 1
 	sleep 1000
-	if $x == 20 then
+	if $x == 50 then
 		return -1
 	endi
 sql show mnodes -x step2
@@ -68,7 +68,7 @@ $x = 0
 step4: 
 	$x = $x + 1
 	sleep 1000
-	if $x == 20 then
+	if $x == 50 then
 		return -1
 	endi
 sql show mnodes -x step4
@@ -98,7 +98,7 @@ $x = 0
 step5: 
 	$x = $x + 1
 	sleep 1000
-	if $x == 20 then
+	if $x == 50 then
 		return -1
 	endi
 sql show mnodes -x step5
@@ -119,7 +119,7 @@ $x = 0
 step6: 
 	$x = $x + 1
 	sleep 1000
-	if $x == 20 then
+	if $x == 50 then
 		return -1
 	endi
 sql show mnodes -x step6