handle graceful shutdown failure

print stack trace and kill myself -9

setup.py

@@ -42,7 +42,7 @@ except:
 
 setuptools.setup(
         name='warcprox',
-        version='2.4.7',
+        version='2.4.8',
         description='WARC writing MITM HTTP/S proxy',
         url='https://github.com/internetarchive/warcprox',
         author='Noah Levitt',

warcprox/controller.py

@@ -441,7 +441,12 @@ class WarcproxController(object):
                     exc_info=True)
             pass
         finally:
-            self.shutdown()
+            try:
+                self.shutdown()
+            except:
+                self.logger.critical("graceful shutdown failed", exc_info=True)
+                self.logger.critical("killing myself -9")
+                os.kill(os.getpid(), 9)
 
     def _dump_profiling(self):
         import pstats, tempfile, os, io