diff --git a/source/libs/index/inc/indexTfile.h b/source/libs/index/inc/indexTfile.h
index 85ed397b0a..6fca3b1bf5 100644
--- a/source/libs/index/inc/indexTfile.h
+++ b/source/libs/index/inc/indexTfile.h
@@ -74,9 +74,10 @@ typedef struct TFileReader {
 } TFileReader;
 
 typedef struct IndexTFile {
-  char*        path;
-  TFileCache*  cache;
-  TFileWriter* tw;
+  char*         path;
+  TFileCache*   cache;
+  TFileWriter*  tw;
+  TdThreadMutex mtx;
 } IndexTFile;
 
 typedef struct TFileWriterOpt {
diff --git a/source/libs/index/src/index.c b/source/libs/index/src/index.c
index 6add788a89..02f1682655 100644
--- a/source/libs/index/src/index.c
+++ b/source/libs/index/src/index.c
@@ -557,20 +557,18 @@ void iterateValueDestroy(IterateValue* value, bool destroy) {
 static int64_t indexGetAvaialbleVer(SIndex* sIdx, IndexCache* cache) {
   ICacheKey key = {.suid = cache->suid, .colName = cache->colName, .nColName = strlen(cache->colName)};
   int64_t   ver = CACHE_VERSION(cache);
-  taosThreadMutexLock(&sIdx->mtx);
-  TFileReader* trd = tfileCacheGet(((IndexTFile*)sIdx->tindex)->cache, &key);
-  if (trd != NULL) {
-    if (ver < trd->header.version) {
-      ver = trd->header.version + 1;
-    } else {
-      ver += 1;
-    }
-    indexInfo("header: %d, ver: %" PRId64 "", trd->header.version, ver);
-    tfileReaderUnRef(trd);
-  } else {
-    indexInfo("not found reader base %p", trd);
+
+  TFileReader* rd = tfileCacheGet(((IndexTFile*)sIdx->tindex)->cache, &key);
+  IndexTFile*  tf = (IndexTFile*)(sIdx->tindex);
+
+  taosThreadMutexLock(&tf->mtx);
+  tfileCacheGet(tf->cache, &key);
+  taosThreadMutexUnlock(&tf->mtx);
+
+  if (rd != NULL) {
+    ver += MAX(ver, rd->header.version) + 1;
+    indexInfo("header: %d, ver: %" PRId64 "", rd->header.version, ver);
   }
-  taosThreadMutexUnlock(&sIdx->mtx);
   return ver;
 }
 static int indexGenTFile(SIndex* sIdx, IndexCache* cache, SArray* batch) {
@@ -597,13 +595,14 @@ static int indexGenTFile(SIndex* sIdx, IndexCache* cache, SArray* batch) {
   }
   indexInfo("success to create tfile, reopen it, %s", reader->ctx->file.buf);
 
+  IndexTFile* tf = (IndexTFile*)sIdx->tindex;
+
   TFileHeader* header = &reader->header;
   ICacheKey    key = {.suid = cache->suid, .colName = header->colName, .nColName = strlen(header->colName)};
 
-  taosThreadMutexLock(&sIdx->mtx);
-  IndexTFile* ifile = (IndexTFile*)sIdx->tindex;
-  tfileCachePut(ifile->cache, &key, reader);
-  taosThreadMutexUnlock(&sIdx->mtx);
+  taosThreadMutexLock(&tf->mtx);
+  tfileCachePut(tf->cache, &key, reader);
+  taosThreadMutexUnlock(&tf->mtx);
   return ret;
 END:
   if (tw != NULL) {
diff --git a/source/libs/index/src/indexTfile.c b/source/libs/index/src/indexTfile.c
index 3d85646bd2..43754193ae 100644
--- a/source/libs/index/src/indexTfile.c
+++ b/source/libs/index/src/indexTfile.c
@@ -151,13 +151,10 @@ TFileReader* tfileCacheGet(TFileCache* tcache, ICacheKey* key) {
   char    buf[128] = {0};
   int32_t sz = indexSerialCacheKey(key, buf);
   assert(sz < sizeof(buf));
-  indexInfo("Try to get key: %s", buf);
   TFileReader** reader = taosHashGet(tcache->tableCache, buf, sz);
   if (reader == NULL || *reader == NULL) {
-    indexInfo("failed to  get key: %s", buf);
     return NULL;
   }
-  indexInfo("Get key: %s file: %s", buf, (*reader)->ctx->file.buf);
   tfileReaderRef(*reader);
 
   return *reader;
@@ -657,7 +654,7 @@ IndexTFile* indexTFileCreate(const char* path) {
     tfileCacheDestroy(cache);
     return NULL;
   }
-
+  taosThreadMutexInit(&tfile->mtx, NULL);
   tfile->cache = cache;
   return tfile;
 }
@@ -665,6 +662,7 @@ void indexTFileDestroy(IndexTFile* tfile) {
   if (tfile == NULL) {
     return;
   }
+  taosThreadMutexDestroy(&tfile->mtx);
   tfileCacheDestroy(tfile->cache);
   taosMemoryFree(tfile);
 }
@@ -680,7 +678,10 @@ int indexTFileSearch(void* tfile, SIndexTermQuery* query, SIdxTempResult* result
 
   SIndexTerm* term = query->term;
   ICacheKey key = {.suid = term->suid, .colType = term->colType, .colName = term->colName, .nColName = term->nColName};
+
+  taosThreadMutexLock(&pTfile->mtx);
   TFileReader* reader = tfileCacheGet(pTfile->cache, &key);
+  taosThreadMutexUnlock(&pTfile->mtx);
   if (reader == NULL) {
     return 0;
   }
@@ -780,8 +781,13 @@ TFileReader* tfileGetReaderByCol(IndexTFile* tf, uint64_t suid, char* colName) {
   if (tf == NULL) {
     return NULL;
   }
-  ICacheKey key = {.suid = suid, .colType = TSDB_DATA_TYPE_BINARY, .colName = colName, .nColName = strlen(colName)};
-  return tfileCacheGet(tf->cache, &key);
+  TFileReader* rd = NULL;
+  ICacheKey    key = {.suid = suid, .colType = TSDB_DATA_TYPE_BINARY, .colName = colName, .nColName = strlen(colName)};
+
+  taosThreadMutexLock(&tf->mtx);
+  rd = tfileCacheGet(tf->cache, &key);
+  taosThreadMutexUnlock(&tf->mtx);
+  return rd;
 }
 
 static int tfileUidCompare(const void* a, const void* b) {
diff --git a/source/libs/index/test/indexTests.cc b/source/libs/index/test/indexTests.cc
index f848cee86b..5c6fe8bf91 100644
--- a/source/libs/index/test/indexTests.cc
+++ b/source/libs/index/test/indexTests.cc
@@ -794,10 +794,10 @@ class IndexObj {
     }
     int sz = taosArrayGetSize(result);
     indexMultiTermQueryDestroy(mq);
-    taosArrayDestroy(result);
     assert(sz == 1);
     uint64_t* ret = (uint64_t*)taosArrayGet(result, 0);
     assert(val = *ret);
+    taosArrayDestroy(result);
 
     return sz;
   }