diff --git a/packaging/cfg/taos.cfg b/packaging/cfg/taos.cfg
index ccce496d2dc0767ed65b54415d6c9b096a839875..4aefc2f44930513c670719c5cad0da0cd0a643e5 100644
--- a/packaging/cfg/taos.cfg
+++ b/packaging/cfg/taos.cfg
@@ -159,10 +159,10 @@
 # stop writing logs when the disk size of the log folder is less than this value
 # minimalLogDirGB       0.1
 
-# stop writing temporary files when the disk size of the log folder is less than this value
+# stop writing temporary files when the disk size of the tmp folder is less than this value
 # minimalTmpDirGB       0.1
 
-# stop writing data when the disk size of the log folder is less than this value
+# if disk free space is less than this value, taosd service exit directly within startup process
 # minimalDataDirGB      0.1
 
 # One mnode is equal to the number of vnode consumed
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index a00ea68bd0c176501a01e309890f06c6c24fd79a..2622246111894caf39f3c1c37923d1a7207935b6 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -1372,13 +1372,6 @@ void tscJoinQueryCallback(void* param, TAOS_RES* tres, int code) {
   // retrieve actual query results from vnode during the second stage join subquery
   if (pParentSql->res.code != TSDB_CODE_SUCCESS) {
     tscError("%p abort query due to other subquery failure. code:%d, global code:%d", pSql, code, pParentSql->res.code);
-
-    if (!(pTableMetaInfo->vgroupIndex > 0 && tscNonOrderedProjectionQueryOnSTable(pQueryInfo, 0))) {
-      if (atomic_sub_fetch_32(&pParentSql->subState.numOfRemain, 1) > 0) {
-        return;
-      }
-    }
-    
     quitAllSubquery(pParentSql, pSupporter);
     tscAsyncResultOnError(pParentSql);
 
@@ -1391,13 +1384,6 @@ void tscJoinQueryCallback(void* param, TAOS_RES* tres, int code) {
 
     tscError("%p abort query, code:%s, global code:%s", pSql, tstrerror(code), tstrerror(pParentSql->res.code));
     pParentSql->res.code = code;
-
-    if (!(pTableMetaInfo->vgroupIndex > 0 && tscNonOrderedProjectionQueryOnSTable(pQueryInfo, 0))) {
-      if (atomic_sub_fetch_32(&pParentSql->subState.numOfRemain, 1) > 0) {
-        return;
-      }
-    }
-
     quitAllSubquery(pParentSql, pSupporter);
     tscAsyncResultOnError(pParentSql);
 
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index 493b8091e93b59f823b11fc021365c9aa90e620c..7ccb7db935e37bb2472384f031ad4b9d144135fd 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -444,7 +444,7 @@ int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bo
 #define TSDB_PORT_HTTP                  11
 #define TSDB_PORT_ARBITRATOR            12
 
-#define TSDB_MAX_WAL_SIZE    (1024*1024*2)
+#define TSDB_MAX_WAL_SIZE    (1024*1024*3)
 
 typedef enum {
   TAOS_QTYPE_RPC   = 0,
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 4978a27d4f415a95f70b60aa2fd1b419a786c2b8..90cd74de72f6b47b7bf99b6055d4a4c5e9cfa7ab 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -6932,11 +6932,12 @@ static size_t getResultSize(SQInfo *pQInfo, int64_t *numOfRows) {
    */
   if (isTSCompQuery(pQuery) && (*numOfRows) > 0) {
     struct stat fStat;
-    if (fstat(fileno(*(FILE **)pQuery->sdata[0]->data), &fStat) == 0) {
+    FILE *f = *(FILE **)pQuery->sdata[0]->data;
+    if ((f != NULL) && (fstat(fileno(f), &fStat) == 0)) {
       *numOfRows = fStat.st_size;
       return fStat.st_size;
     } else {
-      qError("QInfo:%p failed to get file info, path:%s, reason:%s", pQInfo, pQuery->sdata[0]->data, strerror(errno));
+      qError("QInfo:%p failed to get file info, file:%p, reason:%s", pQInfo, f, strerror(errno));
       return 0;
     }
   } else {
@@ -6951,7 +6952,7 @@ static int32_t doDumpQueryResult(SQInfo *pQInfo, char *data) {
   // load data from file to msg buffer
   if (isTSCompQuery(pQuery)) {
 
-    FILE *f = *(FILE **)pQuery->sdata[0]->data;
+    FILE *f = *(FILE **)pQuery->sdata[0]->data;  // TODO refactor
 
     // make sure file exist
     if (f) {