fix kill 15 issues

deps/oblib/src/rpc/obmysql/ob_sql_nio.cpp

@@ -746,6 +746,9 @@ public:
     while (cur != head) {
       ObSqlSock* s = CONTAINER_OF(cur, ObSqlSock, all_list_link_);
       cur = cur->next_;
+      s->on_disconnect();
+      ObSqlSockSession *sess = (ObSqlSockSession *)s->sess_;
+      sess->destroy();
       s->do_close();
     }
   }

src/observer/ob_server.cpp

@@ -531,6 +531,10 @@ void ObServer::destroy()
     ob_service_.destroy();
     FLOG_INFO("ob service destroyed");
 
+    FLOG_INFO("begin to destroy session manager");
+    session_mgr_.destroy();
+    FLOG_INFO("session manager destroyed");
+
     FLOG_INFO("begin to destroy locality manager");
     locality_manager_.destroy();
     FLOG_INFO("locality manager destroyed");

src/share/location_cache/ob_tablet_ls_service.cpp

@@ -251,6 +251,8 @@ int ObTabletLSService::destroy()
   int ret = OB_SUCCESS;
   stopped_ = true;
   inited_ = false;
+  inner_cache_.destroy();
+  async_queue_.destroy();
   return ret;
 }
 

src/sql/session/ob_sql_session_mgr.cpp

@@ -286,6 +286,13 @@ int ObSQLSessionMgr::init()
   return ret;
 }
 
+void ObSQLSessionMgr::destroy()
+{
+  sessinfo_map_.destroy();
+  sessid_sequence_.destroy();
+  sess_hold_map_.destroy();
+}
+
 uint64_t ObSQLSessionMgr::extract_server_id(uint32_t sessid)
 {
   uint64_t server_id = sessid >> LOCAL_SEQ_LEN;

src/sql/session/ob_sql_session_mgr.h

@@ -72,6 +72,7 @@ public:
    * @param conn : connection information
    * @param sess_info : point to the ObSQLSessionInfo that the function created; used as value
    */
+  void destroy();
   int create_session(observer::ObSMConnection *conn, ObSQLSessionInfo *&sess_info);
   // create session by session id and proxy session id.
   // need call revert_session if return success.