From 25516840073b174df3c02f083ce608c4d77580eb Mon Sep 17 00:00:00 2001
From: ksarabu1 <62157128+ksarabu1@users.noreply.github.com>
Date: Wed, 13 May 2020 06:29:06 -0400
Subject: [PATCH] bugfix for attribute error during bootstrap (#1538)

initial bootstrap by attaching Patroni to the running postgres was causing the following error.

```
  File "/xx/lib/python3.8/site-packages/patroni/ha.py", line 529, in update_cluster_history
    history = history[-self.cluster.config.max_timelines_history:]
AttributeError: 'NoneType' object has no attribute 'max_timelines_history'
```
---
 patroni/ha.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/patroni/ha.py b/patroni/ha.py
index c0655ea0..7a0e0adb 100644
--- a/patroni/ha.py
+++ b/patroni/ha.py
@@ -525,7 +525,7 @@ class Ha(object):
         elif not cluster_history or cluster_history[-1][0] != master_timeline - 1 or len(cluster_history[-1]) != 4:
             cluster_history = {line[0]: line for line in cluster_history or []}
             history = self.state_handler.get_history(master_timeline)
-            if history:
+            if history and self.cluster.config:
                 history = history[-self.cluster.config.max_timelines_history:]
                 for line in history:
                     # enrich current history with promotion timestamps stored in DCS