Better exception representation

elasticsearch/exceptions.py

@@ -49,7 +49,13 @@ class TransportError(ElasticsearchException):
         return self.args[2]
 
     def __str__(self):
-        return 'TransportError(%s, %r)' % (self.status_code, self.error)
+        cause = ''
+        try:
+            if self.info:
+                cause = ', %r' % self.info['error']['root_cause'][0]['reason']
+        except LookupError:
+            pass
+        return 'TransportError(%s, %r%s)' % (self.status_code, self.error, cause)
 
 
 class ConnectionError(TransportError):

test_elasticsearch/test_server/test_helpers.py

@@ -14,7 +14,7 @@ class FailingBulkClient(object):
     def bulk(self, *args, **kwargs):
         self._called += 1
         if self._called == self._fail_at:
-            raise TransportError(599, "Error!", "INFO")
+            raise TransportError(599, "Error!", {})
         return  self.client.bulk(*args, **kwargs)
 
 class TestStreamingBulk(ElasticsearchTestCase):