From 93b65bea3c1e592e94d649a97fc1a60557091f31 Mon Sep 17 00:00:00 2001
From: Sean Violante <sean.violante@gmail.com>
Date: Mon, 15 Sep 2014 18:35:55 +0200
Subject: [PATCH] report druid error

---
 pydruid/client.py | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/pydruid/client.py b/pydruid/client.py
index 8d7afbdf..922880b7 100755
--- a/pydruid/client.py
+++ b/pydruid/client.py
@@ -117,8 +117,18 @@ def __post(self, query):
             self.result_json = data
             res.close()
         except urllib2.HTTPError, e:
-            raise IOError('{0} \n Query is: {1}'.format(
-                e, json.dumps(self.query_dict, indent=4)))
+            err=None
+            if e.code==500:
+                # has Druid returned an error?
+                try:
+                    err= json.loads(e.read())                    
+                except ValueError:
+                    pass
+                else:
+                    err= err.get('error',None)
+
+            raise IOError('{0} \n Druid Error: {1} \n Query is: {2}'.format(
+                e, err,json.dumps(self.query_dict, indent=4)))
         else:
             self.result = self.__parse()
             return self.result