diff --git a/CHANGELOG.md b/CHANGELOG.md
index a52c72c4f4..ffe0e3fc09 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ Please mark all change in change log and use the ticket from JIRA.
 # Milvus 0.5.2 (TODO)
 
 ## Bug
+- \#194 - Search faild: message="Table file doesn't exist"
 
 ## Feature
 
diff --git a/core/src/db/meta/MySQLMetaImpl.cpp b/core/src/db/meta/MySQLMetaImpl.cpp
index 44594636ad..c7a054524c 100644
--- a/core/src/db/meta/MySQLMetaImpl.cpp
+++ b/core/src/db/meta/MySQLMetaImpl.cpp
@@ -173,6 +173,7 @@ MySQLMetaImpl::~MySQLMetaImpl() {
 
 Status
 MySQLMetaImpl::NextTableId(std::string& table_id) {
+    std::lock_guard<std::mutex> lock(genid_mutex_);  // avoid duplicated id
     std::stringstream ss;
     SimpleIDGenerator g;
     ss << g.GetNextIDNumber();
@@ -182,6 +183,7 @@ MySQLMetaImpl::NextTableId(std::string& table_id) {
 
 Status
 MySQLMetaImpl::NextFileId(std::string& file_id) {
+    std::lock_guard<std::mutex> lock(genid_mutex_);  // avoid duplicated id
     std::stringstream ss;
     SimpleIDGenerator g;
     ss << g.GetNextIDNumber();
diff --git a/core/src/db/meta/MySQLMetaImpl.h b/core/src/db/meta/MySQLMetaImpl.h
index 02bc6e1752..bb7fb5b59f 100644
--- a/core/src/db/meta/MySQLMetaImpl.h
+++ b/core/src/db/meta/MySQLMetaImpl.h
@@ -136,6 +136,7 @@ class MySQLMetaImpl : public Meta {
     std::shared_ptr<MySQLConnectionPool> mysql_connection_pool_;
     bool safe_grab_ = false;
 
+    std::mutex genid_mutex_;
     //        std::mutex connectionMutex_;
 };  // DBMetaImpl
 
diff --git a/core/src/db/meta/SqliteMetaImpl.cpp b/core/src/db/meta/SqliteMetaImpl.cpp
index 3fed2a81d4..4123858b44 100644
--- a/core/src/db/meta/SqliteMetaImpl.cpp
+++ b/core/src/db/meta/SqliteMetaImpl.cpp
@@ -97,6 +97,7 @@ SqliteMetaImpl::~SqliteMetaImpl() {
 
 Status
 SqliteMetaImpl::NextTableId(std::string &table_id) {
+    std::lock_guard<std::mutex> lock(genid_mutex_);  // avoid duplicated id
     std::stringstream ss;
     SimpleIDGenerator g;
     ss << g.GetNextIDNumber();
@@ -106,6 +107,7 @@ SqliteMetaImpl::NextTableId(std::string &table_id) {
 
 Status
 SqliteMetaImpl::NextFileId(std::string &file_id) {
+    std::lock_guard<std::mutex> lock(genid_mutex_);  // avoid duplicated id
     std::stringstream ss;
     SimpleIDGenerator g;
     ss << g.GetNextIDNumber();
diff --git a/core/src/db/meta/SqliteMetaImpl.h b/core/src/db/meta/SqliteMetaImpl.h
index c8b99b358a..0fc3f3c4ba 100644
--- a/core/src/db/meta/SqliteMetaImpl.h
+++ b/core/src/db/meta/SqliteMetaImpl.h
@@ -132,6 +132,7 @@ class SqliteMetaImpl : public Meta {
  private:
     const DBMetaOptions options_;
     std::mutex meta_mutex_;
+    std::mutex genid_mutex_;
 };  // DBMetaImpl
 
 }  // namespace meta
diff --git a/core/unittest/db/test_meta_mysql.cpp b/core/unittest/db/test_meta_mysql.cpp
index a3259e5645..835ea42492 100644
--- a/core/unittest/db/test_meta_mysql.cpp
+++ b/core/unittest/db/test_meta_mysql.cpp
@@ -185,7 +185,7 @@ TEST_F(MySqlMetaTest, ARCHIVE_TEST_DISK) {
 
     options.archive_conf_ = milvus::engine::ArchiveConf("delete", "disk:11");
     int mode = milvus::engine::DBOptions::MODE::SINGLE;
-    auto impl = milvus::engine::meta::MySQLMetaImpl(options, mode);
+    milvus::engine::meta::MySQLMetaImpl impl(options, mode);
     auto table_id = "meta_test_group";
 
     milvus::engine::meta::TableSchema table;