Re: Using C example basic pub and sub with "wmw"

Glenn McClements <gmcclements@...>

Hi Mark,
It looks like you don't have the Data Fabric Naming Service Daemon (NSD) running. This provides a DNS like service for the middleware, telling subscribers how to connect with publishers. With never versions of Data Fabric TCP the NSD is required by default. 

Data Fabric (wmw) is a commercial component however, and not shipped as part of the open source OpenMAMA. For questions like this it is best to contact your NYSE Technologies' representative and they can walk you through the setup and provide the Data Fabric config guide.


From: Mark Perkin <mark@...>
Date: Wed, 20 Mar 2013 16:44:39 +0000
To: <openmama-users@...>
Subject: [Openmama-users] Using C example basic pub and sub with "wmw"


I'm trying to get the examples mamapublisherc and mamasubscriberc to talk to each other over "wmw". They work fine with "avis". I've tried the following:

./c/mamapublisherc  -s "FEED.BASIC" -tport pub -m wmw -v -v -v
./c/mamasubscriberc -s "FEED.BASIC" -tport sub -m wmw -v -v -v

Where contains:


And I have LD_LIBRARY_PATH set to point to the lib directory from the MAMA 6.0 release.

The two appear to connect as I see the publisher logs the following periodically:

Publishing message 58 to FEED.BASIC.2013-03-20 16:38:59: Transport 0x1b70c10 []: 1 clients connected.
2013-03-20 16:38:59:
    Client IP      :
    Client Port    : 41691
    Client AppName : lt-mamasubscriberc
    Connect Time   : 26
    Subsc Count    : 0
    Q items/size   : 0/131072

The publisher logs that it is publishing messages every second but the subscriber never receives anything. As noted above, the same test with avis shows the subscriber logging receipt of messages.

I notice that the Subsc Count is 0 so the publisher doesn't think the connected client is subscribing to anything. The subscriber clearly appears to subscribe:

2013-03-20 16:41:11: (21dcc740) : setupBasic(): FEED.BASIC: subscription (0x1687370)
2013-03-20 16:41:11: (21dcc740) : wmwBridgeMamaSubscription_create (): Subscribe topic [FEED.BASIC]
2013-03-20 16:41:11: (21dcc740) : NamingService::sendHeartbeat failed to send for client 0x0100007f000055e1
2013-03-20 16:41:11: (21dcc740) : Subscription 0x0x1687370 is now at state MAMA_SUBSCRIPTION_ACTIVATED.
mamasubscriberc: Created inbound subscription.

Any help appreciated.



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