diff --git a/gunicorn/sock.py b/gunicorn/sock.py
index 6405ba38..4de97285 100644
--- a/gunicorn/sock.py
+++ b/gunicorn/sock.py
@@ -57,7 +57,6 @@ class BaseSocket(object):
             self.sock.close()
         except socket.error as e:
             self.log.info("Error while closing socket %s", str(e))
-        time.sleep(0.3)
         del self.sock
 
 
@@ -104,6 +103,7 @@ class UnixSocket(BaseSocket):
                     os.remove(addr)
                 else:
                     raise ValueError("%r is not a socket" % addr)
+        self.parent = os.getpid()
         super(UnixSocket, self).__init__(addr, conf, log, fd=fd)
 
     def __str__(self):
@@ -118,7 +118,8 @@ class UnixSocket(BaseSocket):
 
     def close(self):
         super(UnixSocket, self).close()
-        os.unlink(self.cfg_addr)
+        if self.parent == os.getpid():
+            os.unlink(self.cfg_addr)
 
 
 def _sock_type(addr):
diff --git a/gunicorn/workers/geventlet.py b/gunicorn/workers/geventlet.py
index 48b63fb2..dcb2f3d6 100644
--- a/gunicorn/workers/geventlet.py
+++ b/gunicorn/workers/geventlet.py
@@ -25,7 +25,6 @@ import greenlet
 from gunicorn.http.wsgi import sendfile as o_sendfile
 from gunicorn.workers.async import AsyncWorker
 
-
 def _eventlet_sendfile(fdout, fdin, offset, nbytes):
     while True:
         try:
@@ -87,11 +86,11 @@ def patch_sendfile():
 class EventletWorker(AsyncWorker):
 
     def patch(self):
+        hubs.use_hub()
         eventlet.monkey_patch(os=False)
         patch_sendfile()
 
     def init_process(self):
-        hubs.use_hub()
         self.patch()
         super(EventletWorker, self).init_process()
 
@@ -119,7 +118,11 @@ class EventletWorker(AsyncWorker):
 
         while self.alive:
             self.notify()
-            eventlet.sleep(1.0)
+            try:
+                eventlet.sleep(1.0)
+            except AssertionError:
+                self.alive = False
+                break
 
         self.notify()
         try: