fix fleet elastic bug (#37781)

python/paddle/distributed/fleet/elastic/collective.py

@@ -31,9 +31,9 @@ class CollectiveLauncher(LauncherInterface):
         logger.info("collective lauchner launch ...")
         args = self.args
         self.tmp_dir = tempfile.mkdtemp()
+        cluster, pod = paddle.distributed.fleet.launch.get_cluster_info(args)
         global_envs = paddle.distributed.fleet.launch.get_global_envs(
             args, self.tmp_dir)
-        cluster, pod = paddle.distributed.fleet.launch.get_cluster_info(args)
 
         self.procs = start_local_trainers(
             cluster,