Hi,
we're currently encountering the same problem.
We would like to use UDP packets to send metric to a 3rd party system
(hostedgraphite).
Trying to send UDP with appengine succeed on test server/my console, but
fails once deployed to our servers.
Code:
log.info("building socket");
DatagramSocket socket = new DatagramSocket();
byte[] data = builder.toString().getBytes(Charsets.ISO_8859_1);
InetAddress address = InetAddress.getByName(host);
log.info("trying to send socket message to " +
address.getHostAddress());
DatagramPacket datagramPacket = new DatagramPacket(data,
data.length, address, port);
log.info("packet " +
datagramPacket.getSocketAddress().toString() + " " + new
String(datagramPacket.getData()));
socket.connect(address, port);
log.info("connected to" + address.getHostAddress() + "? " +
socket.isConnected());
socket.send(datagramPacket);
log.info("metric committed in " + new Interval(start, new
Instant()).toDurationMillis());
Note: I've added a socket.connect() just to test wether any connection
problem was found between app engine and this server.
Resulting logs:
I 2013-10-29 16:36:10.403 com.cb.util.metric.GaeMetric commit: building
socket
I 2013-10-29 16:36:10.767 com.cb.util.metric.GaeMetric commit: trying to
send socket message to 88.198.22.7
I 2013-10-29 16:36:10.769 com.cb.util.metric.GaeMetric commit: packet
carbon.hostedgraphite.com/88.198.22.7:2003 metric-one.timeTaken 7047
metric-two.timeTaken 499
I 2013-10-29 16:36:10.769 com.cb.util.metric.GaeMetric commit: connected to
88.198.22.7? true
W 2013-10-29 16:36:50.629 com.cb.util.metric.GaeMetric commit: failed to
commit metric in 40226 error:
com.google.apphosting.api.DeadlineExceededException: This request
(b07775a3893d6656) started at 2013/10/29 16:35:51.219 UTC and was still
executing at 2013/10/29 16:36:50.627 UTC.
Anything else I can provide to help you check where the issue is?
Thanks very much,
Andrea
On Wednesday, August 21, 2013 5:07:33 PM UTC+1, Vinny P wrote:
>
> On Wed, Aug 21, 2013 at 1:50 AM, Wei Liu <[email protected] <javascript:>
> > wrote:
>
>> UDP socket works in development server, but not deployed to app engine
>>
>> TCP socket works fine, but when I use UDP socket, it doesn't work.
>>
>>
> Just to clarify, are you saying that a TCP socket in a deployed App Engine
> application works for you, but an UDP socket doesn't work?
>
>
> On Wed, Aug 21, 2013 at 1:50 AM, Wei Liu <[email protected] <javascript:>
> > wrote:
>
>> After a long wait, my page comes with this:
>>
>> Error: Server Error The server encountered an error and could not
>> complete your request. If the problem persists, please
>> report<http://code.google.com/appengine/community.html> your
>> problem and mention this error message and the query that caused it.
>>
>
> Does anything show up in the logs? Go to your admin console and click the
> Logs link on the left hand side. Also, which server are you attempting to
> send messages to? It might be firewalled or blocking UDP in some way.
>
>
> -----------------
> -Vinny P
> Technology & Media Advisor
> Chicago, IL
>
> App Engine Code Samples: http://www.learntogoogleit.com
>
>
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