diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index eb21a8f5c304d922489f90b319c515e4b6144d7c..6afaf21c059a94a07646498fe503fc7fac501af9 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -138,7 +138,7 @@ do {                                       \
 uint64_t queryHandleId = 0;
 
 int32_t getMaximumIdleDurationSec() {
-  return tsShellActivityTimer * 2;
+  return tsShellActivityTimer * 10;
 }
 int64_t genQueryId(void) {
   int64_t uid = 0;
diff --git a/src/query/src/queryMain.c b/src/query/src/queryMain.c
index 0ba29ab9047d1b526ed29fd7ec3eb87170f2ae17..3538edfcde29ba0cece5fd1e1296b5a4d80c465b 100644
--- a/src/query/src/queryMain.c
+++ b/src/query/src/queryMain.c
@@ -220,6 +220,7 @@ bool qTableQuery(qinfo_t qinfo, uint64_t *qId) {
 
   if (isQueryKilled(pQInfo)) {
     qDebug("QInfo:0x%"PRIx64" it is already killed, abort", pQInfo->qId);
+    pQInfo->runtimeEnv.outputBuf = NULL;
     return doBuildResCheck(pQInfo);
   }