[zeromq-dev] Assertion failed: false (src/pipe.cpp:429) on disconnecting a SUB Socket.

Bachmair Florian - flexSolution GmbH florian.bachmair at flexsolution.eu
Tue May 9 07:23:56 CEST 2017

I'm using a JNI Wrapper to use czmq.(with the latest libzmq and czmq 
from git,compiled yesterday on an arm)
Don't know if this is just a coincidents but this is how I reproduce the 

  * start all Applications(6) (on the same host) they connect to each
    other via TCP automatically
  * If I restart 2 applications at the same time, they may get new
    Ports, the other applications do recognize that(every Application
    announces their ports via multicast) and disconnect from the old,
    now invalid socket
  * 1-2 of the Applications crashes with the error Assertion failed:
    false (src/pipe.cpp:429) when they try to close the socket.

Any Idea what I am doing wrong here?

Java_lib_zmq_ZeroMQNative_native_1disconnect(JNIEnv * env, jobject 
object, jstring ip, jint port) {
// ===============================================
// Convert Java Objects to C
// ===============================================
     puts("debug 1");
     const char* c_ip = (*env)->GetStringUTFChars(env, ip, 0);
     printf("debug 2: %s:%d \n",c_ip,port);
// ===============================================
// Disconnect from tcp://ip:port
// ===============================================
     zsock_disconnect(subscriber, "tcp://%s:%d", c_ip, port);
     //Assertion failed: false (src/pipe.cpp:429)

     puts("debug 3");
// ===============================================
// Free Resources
// ===============================================
     (*env)->ReleaseStringUTFChars(env, ip, c_ip);
     puts("debug 4");
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