CODEWITHSUNDEEP
pythonnode.jszeromqzerorpc
dvreed77
dvreed77

Reputation: 2387

Python/Node ZeroRPC heartbeat error

Im trying to run the Python server/node.js client HelloWorld example from the ZeroRPC website. All the revelant libraries seemed to have been installed correctly, but when running the example I get the error: 

{ name: 'HeartbeatError',
  message: 'Lost remote after 10000ms',
  traceback: '' }

Has anyone seen this?

Upvotes: 1

Views: 2022

Answers (2)

Morti
Morti

Reputation: 707

If you can, use gevent.sleep to let zerorpc enough time to process waiting messages, including heartbeat.

Upvotes: 0

spiralmoon
spiralmoon

Reputation: 3272

I'm using "zerorpc": "^0.9.3" I come across with the same issue when I was running a time-consuming python code. The way to solve the issue is that you need to modify the library code of zerorpc: node_modules -> zerorpc -> lib -> channel.js Change the cooresponding method to

//Runs the heartbeat on this channel
Channel.prototype._runHeartbeat = function() {
    var self = this;

    return setInterval(function() {
        if(util.curTime() > self._heartbeatExpirationTime) {
            //If we haven't received a response in 2 * heartbeat rate, send an
            //error
//            self.emit("heartbeat-error", "Lost remote after " + (HEARTBEAT * 2) + "ms");
//            self.close();
        }

        //Heartbeat on the channel
        try {
            var event = events.create(self._envelope, self._createHeader(), "_zpc_hb", [0]);
            self._socket.send(event);
        } catch(e) {
            console.error("Error occurred while sending heartbeat:", e);
        }
    }, HEARTBEAT);
};

In the latest code from github: https://github.com/dotcloud/zerorpc-node they have solved this issue.

Upvotes: 2

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