What version of JZMQ are you using? I ran your test program and received the correct results.
JZMQ - 018a38d414af4e689c93e29d4d7a59a1f51fe84e libzmq 3.2.2 On Mon, May 20, 2013 at 1:45 AM, Mark Sutheran <mark_suthe...@yahoo.com> wrote: > Hi Pieter, > > Thanks for the quick response - test case below. > > Tested it using ipc and tcp transports - no difference. The trigger appears > to be the flag used in the send() method. Setting this to 1 (ZMQ.NOBLOCK) > causes the unexpected behaviour on the second box. > > Logs: > > Machine 1 (Ubuntu 12.04 64, JZMQ/ZMQ 3.2.0) > > Blocking pub: [7, 0, 0, 13, -49, 0, 0] > ...received data: [7, 0, 0, 13, -49, 0, 0] > Non-blocking pub: [7, 0, 0, 13, -49, 0, 0] > ...received data: [7, 0, 0, 13, -49, 0, 0] > > Machine 2 (Ubuntu 12.04 64, JZMQ/ZMQ 3.2.2) > > Blocking pub: [7, 0, 0, 13, -49, 0, 0] > ...received data: [7, 0, 0, 13, -49, 0, 0] > Non-blocking pub: [7, 0, 0, 13, -49, 0, 0] > ...received data: [0, 0, 13, -49, 0, 0] > > Regards, > Mark > > Jzmq test case: > > /*************************************************************************************************************************/ > > package zmqtest; > > import java.util.Arrays; > > import org.zeromq.ZMQ; > > public class ZMQTest { > > private static final ZMQ.Context context = ZMQ.context(1); > private static final ZMQ.Socket subscriber = context.socket(ZMQ.SUB); > private static final String tcpPort = "9999"; > > private static final byte[] TEST_DATA = new byte[]{7, 0, 0, 13, -49, 0, 0}; > > public static void main(String[] args) { > > System.out.println("Using ZMQ version: " + ZMQ.getVersionString()); > subscriber.connect("tcp://localhost:" + tcpPort); > subscriber.subscribe(new byte[]{}); > Thread t = new Thread(new SubscriptionDataHandler()); > t.setName("SubscriptionDataHandlerThread"); > t.setDaemon(true); > t.start(); > > ZMQ.Socket publisher = context.socket(ZMQ.PUB); > publisher.bind("tcp://*:" + tcpPort); > try { > > for (int i = 0; i < 3; i++) { > System.out.println("Blocking pub:\t\t" + Arrays.toString(TEST_DATA)); > publisher.send(TEST_DATA,0); > Thread.sleep(1000l); > System.out.println("Non-blocking pub:\t" + Arrays.toString(TEST_DATA)); > publisher.send(TEST_DATA,ZMQ.NOBLOCK); > Thread.sleep(1000l); > } > Thread.sleep(500l); > > } catch (Exception e) { > e.printStackTrace(); > } > } > private static final class SubscriptionDataHandler implements Runnable { > > @Override > public void run() { > System.out.println("SubscriptionDataHandler thread starting"); > while (true) { > final byte[] rec = subscriber.recv(0); > System.out.println("...received data:\t" + Arrays.toString(rec)); > } > } > } > } > > > ________________________________ > From: Pieter Hintjens <p...@imatix.com> > To: Mark Sutheran <mark_suthe...@yahoo.com>; ZeroMQ development list > <zeromq-dev@lists.zeromq.org> > Sent: Sunday, 19 May 2013, 17:04 > Subject: Re: [zeromq-dev] PUB/SUB appears to be 'missing' first byte 3.2.2 > > Hi Mark, > > Would you provide a minimal test case that demonstrates the problem? > > Thanks > Pieter > > On Sat, May 18, 2013 at 6:56 PM, Mark Sutheran <mark_suthe...@yahoo.com> > wrote: >> Hi, >> >> I appear to have a issue with PUB/SUB apparently 'dropping' the first >> byte. >> >> Setup: >> * Basic PUB/SUB running on same machine over TCP/localhost. >> * Message has first 4 bytes as subscription id, rest payload >> >> Problem: >> * On dev box runs fine >> * On prod box the subscriber sees no messages >> * The reason is that the received message is 'missing' the first byte >> >> Logs: >> >> Machine 1 (Ubuntu 12.04 64, JZMQ/ZMQ 3.2.0) runs fine, e.g.: >> >> 01:19:10:042 DEBUG [qtp1866572071-24] Publishing: [0, 0, 0, 13, -49, 0, 0, >> 1, 62, -72, -90, -29, 63, 7, -108, -53, 63, -12, -122, -13, 110, -8, 5, >> 96, >> -53, 64, 89, -9, -101, -128, 35, -90, -50, -53, 0, 0, 0, 0, 0, 0, 0, 0, >> -53, >> 64, 68, 0, 0, 0, 0, 0, 0, 0] >> 01:19:10:042 DEBUG [SubscriptionDataHandlerThread] Received data: [0, 0, >> 0, >> 13, -49, 0, 0, 1, 62, -72, -90, -29, 63, 7, -108, -53, 63, -12, -122, -13, >> 110, -8, 5, 96, -53, 64, 89, -9, -101, -128, 35, -90, -50, -53, 0, 0, 0, >> 0, >> 0, 0, 0, 0, -53, 64, 68, 0, 0, 0, 0, 0, 0, 0] >> >> Machine 2 (Ubuntu 12.04 64, JZMQ/ZMQ 3.2.2) and the subscriptions >> 'disappear'... digging into it the receiver appears to drop the first byte >> of the messages 100% of the time, e.g.: >> >> 05:20:01:603 DEBUG [qtp1038722314-22] Publishing: [0, 0, 0, 13, -49, 0, 0, >> 1, 62, -72, -90, 61, 85, 7, -108, -53, 63, -12, -122, -13, 110, -8, 5, 96, >> -53, 64, 89, -9, -101, -128, 35, -90, -50, -53, 0, 0, 0, 0, 0, 0, 0, 0, >> -53, >> 64, 68, 0, 0, 0, 0, 0, 0, 0] >> 05:20:01:603 DEBUG [SubscriptionDataHandlerThread] Received data: [0, 0, >> 13, >> -49, 0, 0, 1, 62, -72, -90, 61, 85, 7, -108, -53, 63, -12, -122, -13, 110, >> -8, 5, 96, -53, 64, 89, -9, -101, -128, 35, -90, -50, -53, 0, 0, 0, 0, 0, >> 0, >> 0, 0, -53, 64, 68, 0, 0, 0, 0, 0, 0, 0] >> >> Connecting Machine 1 (SUB) to Machine 2 (PUB) also produces the same >> results. >> >> It's presumably an issue with my code however, it's the same code running >> on >> both boxes. The one obvious difference is the ZMQ version, though I've not >> seen this before and it doesn't seem to correspond to anything I can see >> on >> the buglist. Any ideas? >> >> Thanks in advance, >> Mark >> >> _______________________________________________ >> zeromq-dev mailing list >> zeromq-dev@lists.zeromq.org >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >> > _______________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > > > > _______________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > _______________________________________________ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev