diff --git a/source/libs/index/src/index.c b/source/libs/index/src/index.c
index 44d306658949ba1164a1c3585363fd452e1d83a3..b5a65a9fdac11c69c2e1f330a74c305947e27bc4 100644
--- a/source/libs/index/src/index.c
+++ b/source/libs/index/src/index.c
@@ -401,7 +401,7 @@ int indexFlushCacheTFile(SIndex* sIdx, void* cache) {
 
   IndexCache*  pCache = (IndexCache*)cache;
   TFileReader* pReader = tfileGetReaderByCol(sIdx->tindex, pCache->suid, pCache->colName);
-  if (pReader == NULL) { indexWarn("empty pReader found"); }
+  if (pReader == NULL) { indexWarn("empty tfile reader found"); }
   // handle flush
   Iterate* cacheIter = indexCacheIteratorCreate(pCache);
   Iterate* tfileIter = tfileIteratorCreate(pReader);
@@ -512,6 +512,7 @@ static int indexGenTFile(SIndex* sIdx, IndexCache* cache, SArray* batch) {
   return ret;
 END:
   tfileWriterClose(tw);
+  return -1;
 }
 
 int32_t indexSerialCacheKey(ICacheKey* key, char* buf) {
diff --git a/source/libs/index/test/indexTests.cc b/source/libs/index/test/indexTests.cc
index 0ce48bcec4596f3835abf8fa06210cfac853f5ec..2ba6b505c56bce811998f8e32870832eb16428bc 100644
--- a/source/libs/index/test/indexTests.cc
+++ b/source/libs/index/test/indexTests.cc
@@ -934,6 +934,7 @@ TEST_F(IndexEnv2, testIndex_read_performance) {
   index->PutOneTarge("tag1", "Hello", 15);
   index->ReadMultiMillonData("tag1", "Hello");
   std::cout << "reader sz: " << index->SearchOne("tag1", "Hello") << std::endl;
+  assert(3 == index->SearchOne("tag1", "Hello"));
 }
 TEST_F(IndexEnv2, testIndexMultiTag) {
   std::string path = "/tmp/test3";