Merge branch 'branch-0.5.0' into 'branch-0.5.0'

MS-577 Unittest Query randomly hung

See merge request megasearch/milvus!592

Former-commit-id: 6457d9e8d41adba338c728635b75cfef6492fe7b

cpp/CHANGELOG.md

@@ -7,6 +7,7 @@ Please mark all change in change log and use the ticket from JIRA.
 ## Bug
 - MS-568 - Fix gpuresource free error
 - MS-572 - Milvus crash when get SIGINT
+- MS-577 - Unittest Query randomly hung
 
 ## Improvement
 - MS-552 - Add and change the easylogging library

cpp/src/scheduler/JobMgr.cpp

@@ -32,8 +32,8 @@ JobMgr::JobMgr(ResourceMgrPtr res_mgr)
 void
 JobMgr::Start() {
     if (not running_) {
-        worker_thread_ = std::thread(&JobMgr::worker_function, this);
         running_ = true;
+        worker_thread_ = std::thread(&JobMgr::worker_function, this);
     }
 }