From 238426917f24f3dde64c6117003bf876605fa646 Mon Sep 17 00:00:00 2001
From: Patrick Browne <pt.browne@gmail.com>
Date: Mon, 3 Oct 2016 21:52:20 +0200
Subject: [PATCH] feat(import_app): print original exception on AppImportError
 (#1334)

* feat(import_app): print original exception on AppImportError
---
 gunicorn/util.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gunicorn/util.py b/gunicorn/util.py
index a011fb8535..3bbb92c3ce 100644
--- a/gunicorn/util.py
+++ b/gunicorn/util.py
@@ -24,6 +24,7 @@
 import errno
 import warnings
 import cgi
+import logging
 
 from gunicorn.errors import AppImportError
 from gunicorn.six import text_type
@@ -384,9 +385,12 @@ def import_app(module):
 
     mod = sys.modules[module]
 
+    is_debug = logging.root.level == logging.DEBUG
     try:
         app = eval(obj, mod.__dict__)
     except NameError:
+        if is_debug:
+            traceback.print_exception(*sys.exc_info())
         raise AppImportError("Failed to find application: %r" % module)
 
     if app is None:
@@ -565,4 +569,4 @@ def app(environ, start_response):
         ])
         return [msg]
 
-    return app
\ No newline at end of file
+    return app