From 3a7ed8d19416979754bbdddb06ea54799c14f151 Mon Sep 17 00:00:00 2001
From: John Bodley <4567245+john-bodley@users.noreply.github.com>
Date: Fri, 17 Nov 2017 20:20:47 -0800
Subject: [PATCH] [druid] Catch IOError when fetching Druid datasource time
 boundary (#3897)

---
 superset/connectors/druid/models.py | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/superset/connectors/druid/models.py b/superset/connectors/druid/models.py
index c91dc71adcc2..6bf39f2299d0 100644
--- a/superset/connectors/druid/models.py
+++ b/superset/connectors/druid/models.py
@@ -564,11 +564,15 @@ def latest_metadata(self):
         """Returns segment metadata from the latest segment"""
         logging.info('Syncing datasource [{}]'.format(self.datasource_name))
         client = self.cluster.get_pydruid_client()
-        results = client.time_boundary(datasource=self.datasource_name)
-        if not results:
-            return
-        max_time = results[0]['result']['maxTime']
-        max_time = dparse(max_time)
+        try:
+            results = client.time_boundary(datasource=self.datasource_name)
+        except IOError:
+            results = None
+        if results:
+            max_time = results[0]['result']['maxTime']
+            max_time = dparse(max_time)
+        else:
+            max_time = datetime.now()
         # Query segmentMetadata for 7 days back. However, due to a bug,
         # we need to set this interval to more than 1 day ago to exclude
         # realtime segments, which triggered a bug (fixed in druid 0.8.2).