diff --git a/source/libs/qworker/src/qwUtil.c b/source/libs/qworker/src/qwUtil.c
index 1fb0a343147821bd60ea9960f568fc04eecd272e..5aaf2b80381986ff1120bf527e81d5c537eab834 100644
--- a/source/libs/qworker/src/qwUtil.c
+++ b/source/libs/qworker/src/qwUtil.c
@@ -433,8 +433,8 @@ void qwSetHbParam(int64_t refId, SQWHbParam **pParam) {
 }
 
 void qwSaveTbVersionInfo(qTaskInfo_t pTaskInfo, SQWTaskCtx *ctx) {
-  char dbFName[TSDB_DB_FNAME_LEN];
-  char tbName[TSDB_TABLE_NAME_LEN];
+  char dbFName[TSDB_DB_FNAME_LEN] = {0};
+  char tbName[TSDB_TABLE_NAME_LEN] = {0};
 
   qGetQueriedTableSchemaVersion(pTaskInfo, dbFName, tbName, &ctx->tbInfo.sversion, &ctx->tbInfo.tversion);