diff --git a/src/fdcache.cpp b/src/fdcache.cpp
index 5e5efa2..aa3c92b 100644
--- a/src/fdcache.cpp
+++ b/src/fdcache.cpp
@@ -1001,10 +1001,10 @@ bool FdEntity::OpenAndLoadAll(headers_t* pmeta, size_t* size, bool force_load)
 
 bool FdEntity::GetStats(struct stat& st)
 {
+  AutoLock auto_lock(&fdent_lock);
   if(-1 == fd){
     return false;
   }
-  AutoLock auto_lock(&fdent_lock);
 
   memset(&st, 0, sizeof(struct stat)); 
   if(-1 == fstat(fd, &st)){
@@ -2116,6 +2116,7 @@ FdEntity* FdManager::ExistOpen(const char* path, int existfd, bool ignore_existf
 
 void FdManager::Rename(const std::string &from, const std::string &to)
 {
+  AutoLock auto_lock(&FdManager::fd_manager_lock);
   fdent_map_t::iterator iter = fent.find(from);
   if(fent.end() != iter){
     // found