diff --git a/gunicorn/workers/gthread.py b/gunicorn/workers/gthread.py
index 579f9d83..df60951f 100644
--- a/gunicorn/workers/gthread.py
+++ b/gunicorn/workers/gthread.py
@@ -194,6 +194,9 @@ class ThreadWorker(base.Worker):
                     callback = key.data
                     callback(key.fileobj)
 
+            if not self.is_parent_alive():
+                break
+
             # hanle keepalive timeouts
             self.murder_keepalived()