From b77882a830112a5abdf0756377e06dea9a4a2556 2013-08-20 23:32:51
From: MinRK <benjaminrk@gmail.com>
Date: 2013-08-20 23:32:51
Subject: [PATCH] close Client sockets if connection fails

avoids runaway FDs in cases of frequent client failure.
---

diff --git a/IPython/parallel/client/client.py b/IPython/parallel/client/client.py
index ff9ecaa..e6dc974 100644
--- a/IPython/parallel/client/client.py
+++ b/IPython/parallel/client/client.py
@@ -495,7 +495,12 @@ class Client(HasTraits):
                                     }
         self._queue_handlers = {'execute_reply' : self._handle_execute_reply,
                                 'apply_reply' : self._handle_apply_reply}
-        self._connect(sshserver, ssh_kwargs, timeout)
+        
+        try:
+            self._connect(sshserver, ssh_kwargs, timeout)
+        except:
+            self.close(linger=0)
+            raise
         
         # last step: setup magics, if we are in IPython: