Apple Push APNS Sometimes not arriving - iphone

Question

I have an app which is already on the app store,
I also have a server that sends push notification to the iphone.
My problem is that sometimes, the notification does not arrive to the iphone,
and this only happened after there was no apns communication to the apple push server after 2 or 3 hours, but after timeout, it would start working again. it was really random.
At first i though the problem was a timeout, then i tried to print out the return value of my ssl_wrap.send() functions, and it did return the length of the strings that was supposed to be sent, meaning, Apple APNS received all my json strings. it is just not broadcasting them to the client phone.
I need to keep firing the apns server until it timeouts before making the push notification work again, this is not right.
Any ideas?
class PushSender:
def __init__(self):
_sock = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
_sock.settimeout(2)
self.ssl_sock = ssl.wrap_socket( _sock, certfile = theCertfile )
self.ssl_sock.settimeout(1)
self.ssl_sock.connect( theHost )
self.counter = 0
self.lastPush = time()
def reset(self):
Log("Reset APNS");
self.ssl_sock.close()
_sock = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
_sock.settimeout(2)
self.ssl_sock = ssl.wrap_socket( _sock, certfile = theCertfile )
self.ssl_sock.settimeout(1)
self.ssl_sock.connect( theHost )
self.counter = self.counter + 1;
self.lastPush = time()
def send(self,token, message, badge, sound):
#Log("INIT APNS")
payload = {}
aps = {}
aps["alert"] = str(message)
aps["badge"] = badge
aps["sound"] = str(sound)
payload["aps"] = aps
if time() - self.lastPush> 60*30 : # 30 minutes idle reconnect
self.reset()
try:
#Log("Making Message APNS")
tokenh = binascii.unhexlify(token)
payloadstr = json.dumps(payload, separators=(',',':'))
payloadLen = len(payloadstr)
fmt = "!cH32sH%ds" % payloadLen
command = '\x00'
msg = struct.pack(fmt, command, 32, tokenh, payloadLen, payloadstr)
except:
Log("APNS Data Error " +token+" " +message);
return;
try:
#Log(msg)
sent = 0;
while sent < len(msg):
msg2 = msg[sent:];
justSent = self.ssl_sock.write( msg2 )
#Log(str(len(msg)) + " " + str(justSent))
sent += justSent
if justSent==0 :
raise socket.error(0,"Send failed")
except socket.error, err:
Log( "APNS Error: "+str(self.counter)+" "+ str(err) )
self.reset()
if self.counter<=2 : self.send(token,message,badge,sound)
Log( "APNS DONE"+ str(self.counter))
self.counter = 0;
self.lastPush = time()