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

[Luca Boccassi]

It is, as the documentation says sockets are not thread safe and must
be created, used and closed from the same thread

http://api.zeromq.org/4-2:zmq-socket

On Tue, 2017-05-09 at 16:00 +0200, Florian Bachmair wrote:
> yes it is, but not at the same time. is that a problem?
> 
> 
> On 09.05.2017 12:29, Luca Boccassi wrote:
> > Is the same socket being used from multiple thread?
> > 
> > On Tue, 2017-05-09 at 08:01 +0200, Bachmair Florian - flexSolution
> > GmbH
> > wrote:
> > > further output
> > > 
> > > Assertion failed: false (src/pipe.cpp:429)
> > > 
> > > #0  0x63835c6c in /home/flex/core-
> > > 1.0.0/emerson2/lib/native/libzmq.so
> > > (zmq::zmq_abort(char const*)+0x8)
> > > #1  0x63846718 in /home/flex/core-
> > > 1.0.0/emerson2/lib/native/libzmq.so
> > > (zmq::pipe_t::terminate(bool)+0x84)
> > > #2  0x63857e58 in /home/flex/core-
> > > 1.0.0/emerson2/lib/native/libzmq.so
> > > (zmq::socket_base_t::term_endpoint(char const*)+0x19c)
> > > #3  0x638bfc0c in /home/flex/core-
> > > 1.0.0/emerson2/lib/native/libczmq.so
> > > (zsock_disconnect+0x48)
> > > 
> > > 
> > > On 2017-05-09 07:23, Bachmair Florian - flexSolution GmbH wrote:
> > > > Hi!
> > > > 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 error:
> > > > 
> > > >    * 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?
> > > > 
> > > > 
> > > > JNIEXPORT void JNICALL
> > > > Java_lib_zmq_ZeroMQNative_native_1disconnect(JNIEnv * env,
> > > > jobject
> > > > object, jstring ip, jint port) {
> > > > // ===============================================
> > > > // Convert Java Objects to C
> > > > // ===============================================
> > > >      puts("debug 1");
> > > >      fflush(stdout);
> > > >      const char* c_ip = (*env)->GetStringUTFChars(env, ip, 0);
> > > >      printf("debug 2: %s:%d \n",c_ip,port);
> > > >      fflush(stdout);
> > > > // ===============================================
> > > > // Disconnect from tcp://ip:port
> > > > // ===============================================
> > > >      zsock_disconnect(subscriber, "tcp://%s:%d", c_ip, port);
> > > >      //Assertion failed: false (src/pipe.cpp:429)
> > > > 
> > > >      puts("debug 3");
> > > >      fflush(stdout);
> > > > // ===============================================
> > > > // Free Resources
> > > > // ===============================================
> > > >      (*env)->ReleaseStringUTFChars(env, ip, c_ip);
> > > >      puts("debug 4");
> > > >      fflush(stdout);
> > > > }
> > > > 
> > > > 
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> > > 
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> > > 
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> 
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