Fix comments
diff --git a/src/cpp/server/server_builder.cc b/src/cpp/server/server_builder.cc
index 5966e54..54feac3 100644
--- a/src/cpp/server/server_builder.cc
+++ b/src/cpp/server/server_builder.cc
@@ -119,6 +119,7 @@
     for (auto plugin = plugins_.begin(); plugin != plugins_.end(); plugin++) {
       if ((*plugin).second->has_sync_methods()) {
         thread_pool.reset(CreateDefaultThreadPool());
+        has_sync_methods = true;
         break;
       }
     }