diff --git a/src/dnode/src/dnodeMain.c b/src/dnode/src/dnodeMain.c
index 2f693c61fbf5df441b57a130f7beab1cc77cd81e..68fe9869899edc42a1f6c251cce9749a800f43f6 100644
--- a/src/dnode/src/dnodeMain.c
+++ b/src/dnode/src/dnodeMain.c
@@ -37,6 +37,7 @@ static SDnodeRunStatus tsDnodeRunStatus = TSDB_DNODE_RUN_STATUS_STOPPED;
 int32_t dnodeInitSystem() {
   dnodeSetRunStatus(TSDB_DNODE_RUN_STATUS_INITIALIZE);
   tscEmbedded  = 1;
+  taosBlockSIGPIPE();
   taosResolveCRC();
   taosInitGlobalCfg();
   taosReadGlobalLogCfg();
diff --git a/src/mnode/src/mgmtMnode.c b/src/mnode/src/mgmtMnode.c
index 3ba7042c4091c265c8ff703ef658875525c98b73..e9d14dc6e77ae904e456109586c4c4cc782b26ef 100644
--- a/src/mnode/src/mgmtMnode.c
+++ b/src/mnode/src/mgmtMnode.c
@@ -210,6 +210,9 @@ void mgmtUpdateMnodeIpSet() {
 
   mgmtMnodeWrLock();
 
+  memset(ipSet, 0, sizeof(tsMnodeRpcIpSet));
+  memset(mnodes, 0, sizeof(SDMMnodeInfos));
+
   int32_t index = 0;
   void *  pIter = NULL;
   while (1) {
diff --git a/tests/script/tmp/prepare.sim b/tests/script/tmp/prepare.sim
index 68a05a33e75e0716d83c21da3aade66a16ca472a..31d78395668502b844b22608922622c52387988a 100644
--- a/tests/script/tmp/prepare.sim
+++ b/tests/script/tmp/prepare.sim
@@ -1,4 +1,14 @@
 system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+
+system sh/cfg.sh -n dnode1 -c numOfMPeers -v 2
+system sh/cfg.sh -n dnode2 -c numOfMPeers -v 2
+system sh/cfg.sh -n dnode3 -c numOfMPeers -v 2
+
+return
+system sh/stop_dnodes.sh
 
 system sh/deploy.sh -n dnode1 -i 1
 system sh/deploy.sh -n dnode2 -i 2