diff --git a/patroni/ha.py b/patroni/ha.py
index 507d38ca..3ec672b9 100644
--- a/patroni/ha.py
+++ b/patroni/ha.py
@@ -273,7 +273,9 @@ class Ha(object):
         else:
             create_replica_methods = self.get_standby_cluster_config().get('create_replica_methods', []) \
                                      if self.is_standby_cluster() else None
-            if self.state_handler.can_create_replica_without_replication_connection(create_replica_methods):
+            can_bootstrap = self.state_handler.can_create_replica_without_replication_connection(create_replica_methods)
+            concurrent_bootstrap = self.cluster.initialize == ""
+            if can_bootstrap and not concurrent_bootstrap:
                 msg = 'bootstrap (without leader)'
                 return self._async_executor.try_run_async(msg, self.clone) or 'trying to ' + msg
             return 'waiting for {0}leader to bootstrap'.format('standby_' if self.is_standby_cluster() else '')
diff --git a/tests/test_ha.py b/tests/test_ha.py
index 0203d9ca..b5c496c1 100644
--- a/tests/test_ha.py
+++ b/tests/test_ha.py
@@ -45,6 +45,10 @@ def get_cluster_not_initialized_without_leader(cluster_config=None):
     return get_cluster(None, None, [], None, SyncState(None, None, None), cluster_config)
 
 
+def get_cluster_bootstrapping_without_leader(cluster_config=None):
+    return get_cluster("", None, [], None, SyncState(None, None, None), cluster_config)
+
+
 def get_cluster_initialized_without_leader(leader=False, failover=None, sync=None, cluster_config=None):
     m1 = Member(0, 'leader', 28, {'conn_url': 'postgres://replicator:rep-pass@127.0.0.1:5435/postgres',
                                   'api_url': 'http://127.0.0.1:8008/patroni', 'xlog_location': 4})
@@ -469,6 +473,11 @@ class TestHa(PostgresInit):
         self.p.can_create_replica_without_replication_connection = MagicMock(return_value=True)
         self.assertEqual(self.ha.bootstrap(), 'trying to bootstrap (without leader)')
 
+    def test_bootstrap_not_running_concurrently(self):
+        self.ha.cluster = get_cluster_bootstrapping_without_leader()
+        self.p.can_create_replica_without_replication_connection = MagicMock(return_value=True)
+        self.assertEqual(self.ha.bootstrap(), 'waiting for leader to bootstrap')
+
     def test_bootstrap_initialize_lock_failed(self):
         self.ha.cluster = get_cluster_not_initialized_without_leader()
         self.assertEqual(self.ha.bootstrap(), 'failed to acquire initialize lock')