diff --git a/src/balance/src/bnMain.c b/src/balance/src/bnMain.c
index 2532cf09a7..622d7197ab 100644
--- a/src/balance/src/bnMain.c
+++ b/src/balance/src/bnMain.c
@@ -330,7 +330,7 @@ void bnReset() {
   tsAccessSquence = 0;
 }
 
-static int32_t bnMonitorVgroups() {
+static bool bnMonitorVgroups() {
   void *  pIter = NULL;
   SVgObj *pVgroup = NULL;
   bool    hasUpdatingVgroup = false;
diff --git a/src/balance/src/bnThread.c b/src/balance/src/bnThread.c
index bf046a9fae..bab4265734 100644
--- a/src/balance/src/bnThread.c
+++ b/src/balance/src/bnThread.c
@@ -31,7 +31,10 @@ static void *bnThreadFunc(void *arg) {
     }
 
     pthread_cond_wait(&tsBnThread.cond, &tsBnThread.mutex);
+    mDebug("balance thread wakes up to work");
     bool updateSoon = bnStart();
+    mDebug("balance thread finished this poll, updateSoon:%d", updateSoon);
+    
     bnStartTimer(updateSoon ? 1000 : -1);
     pthread_mutex_unlock(&(tsBnThread.mutex));
   }
diff --git a/tests/script/sh/deploy.sh b/tests/script/sh/deploy.sh
index 363816c9cd..9b61a33d45 100755
--- a/tests/script/sh/deploy.sh
+++ b/tests/script/sh/deploy.sh
@@ -137,6 +137,7 @@ echo "numOfThreadsPerCore    2.0"                >> $TAOS_CFG
 echo "defaultPass            taosdata"           >> $TAOS_CFG
 echo "numOfLogLines          20000000"           >> $TAOS_CFG
 echo "mnodeEqualVnodeNum     0"                  >> $TAOS_CFG
+echo "balanceInterval        1"                  >> $TAOS_CFG
 echo "clog                   2"                  >> $TAOS_CFG
 #echo "cache                 1"                  >> $TAOS_CFG
 echo "days                   10"                  >> $TAOS_CFG