Does ZeroMQ/czmq fail once creating too many [ inproc:// ] connections? -

i have set of producers , consumers, both of implemented zactors. consumers bind inproc endpoints, , each producer connects every other consumer.

at 1 point, seems zeromq cannot create more sockets or connections _{( not sure ).}

minimal working example:

#include "czmq.h"  void source_t(zsock_t * pipe, void *args); void sink_t(zsock_t * pipe, void *args);  int main(int argc, char *argv[]){     zsys_init();     printf("max sockets = %d\n", zsys_socket_limit());     int num_sources = atoi(argv[1]);     int num_sinks = atoi(argv[2]);      /** create sinks */     zactor_t *sinks[num_sources];     (int = 0; < num_sources; i++){         sinks[i] = zactor_new(sink_t, (void *)(&i));         assert(sinks[i]);     }      /** create sources */     zactor_t *sources[num_sources];     (int = 0; < num_sources; i++){         sources[i] = zactor_new(source_t, (void *)(&i));         assert(sources[i]);         zsock_send(sources[i], "i", num_sinks);         zsock_wait(sources[i]);     }     return 0; }  void source_t(zsock_t * pipe, void *args){     const int id = *((int *)args);     zsock_signal(pipe, 0);     int num_sinks;     zsock_recv(pipe, "i", &num_sinks);     zsock_t * transmitters[num_sinks];     (int = 0; < num_sinks; i++){         transmitters[i] = zsock_new(zmq_push);         if(transmitters[i] == null){             printf( "source %d not create socket %d because %s\n",                     id, i, strerror(errno)                     );             assert(false); ////// here's fails ___________________         }         int rc = zsock_connect(transmitters[i], "inproc://snk%d", i);         if (rc != 0){             printf("source %d not connect sink %d because %s\n", id, i, strerror(errno));             assert(false);         }     }     zsock_signal(pipe, 0); }  void sink_t(zsock_t * pipe, void *args){     const int id = *((int *)args);     zsock_t * receiver = zsock_new(zmq_pull);     assert(receiver);     int rc = zsock_bind(receiver, "inproc://snk%d", id);     assert(rc == 0);     zsock_signal(pipe, 0);     while (true){         zsock_recv(receiver, "z");     } } 

i ran on linux 30 producers , 30 consumers , failed. open files limit 6144.

here's output:

$ zproctest 30 30 max sockets = 65535 source 29 not create socket 4 because socket operation on non-socket zproctest: ../src/zproctest.cpp:43: void source_t(zsock_t*, void*): assertion `false' failed. aborted 

is there else has faced similar issue or can shed light on it?