oboki commented on code in PR #38466:
URL: https://github.com/apache/airflow/pull/38466#discussion_r1539548331


##########
airflow/providers/docker/operators/docker.py:
##########
@@ -343,13 +345,21 @@ def hook(self) -> DockerHook:
             assert_hostname=self.tls_hostname,
             ssl_version=self.tls_ssl_version,
         )
-        return DockerHook(
-            docker_conn_id=self.docker_conn_id,
-            base_url=self.docker_url,
-            version=self.api_version,
-            tls=tls_config,
-            timeout=self.timeout,
-        )
+        hook = None
+        for url in self.docker_url:
+            hook = DockerHook(
+                docker_conn_id=self.docker_conn_id,
+                base_url=url,
+                version=self.api_version,
+                tls=tls_config,
+                timeout=self.timeout
+            )
+            try:
+                hook.get_conn()

Review Comment:
   I followed your suggestion and moved the part that causes connection 
overhead to the `get_conn` method in the hook. It works well. Thank you!



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