fix: join stale receive thread before creating new one

Co-authored-by: MyungJoo Ham <myungjoo.ham@samsung.com>

Author: cursoragent

c/src/ml-api-service-training-offloading.c

@@ -570,6 +570,11 @@ _training_offloading_check_received_data (ml_training_services_s * training_s)
 
   g_return_val_if_fail (training_s != NULL, FALSE);
 
+  if (training_s->received_thread) {
+    g_thread_join (training_s->received_thread);
+    training_s->received_thread = NULL;
+  }
+
   training_s->received_thread = g_thread_new ("check_received_file",
       _check_received_data_thread, training_s);