fix

src/ZEO/asyncio/client.py

@@ -127,10 +127,12 @@ class Protocol(base.Protocol):
 
         @cr.add_done_callback
         def done_connecting(future):
-            try:
-                future.exception()
-            except Exception:
-                logger.exception("Connection to %r failed", self.addr)
+            if future.cancelled():
+                logger.info("Connection to %r cancelled", self.addr)
+            elif future.exception() is not None:
+                logger.info("Connection to %r failed, %s",
+                            (self.addr, future.exception()))
+            else: return
             # keep trying
             if not self.closed:
                 logger.info("retry connecting %r", self.addr)
@@ -139,6 +141,7 @@ class Protocol(base.Protocol):
                     self.connect,
                     )
 
+
     def connection_made(self, transport):
         super(Protocol, self).connection_made(transport)
         self.heartbeat(write=False)