[zeromq-dev] Assertion failed: pfd.revents & POLLIN (src/signaler.cpp:243)
Luca Boccassi
luca.boccassi at gmail.com
Fri Sep 29 22:14:22 CEST 2017
On Fri, 2017-09-29 at 11:38 +0200, Bachmair Florian - flexSolution GmbH
wrote:
> Hi!
>
> When I stop my application in roughly 1 out of 20 tries I get this
> error:
>
> Assertion failed: pfd.revents & POLLIN (src/signaler.cpp:243) (here
> is
> the corresponding line of code:
> https://github.com/zeromq/libzmq/blob/v4.2.0/src/signaler.cpp#L243 )
>
> Stack trace of thread 8576:
> #0 0x00007f56d22a78a0 raise (libc.so.6)
> #1 0x00007f56d22a8f09 abort (libc.so.6)
> #2 0x00007f5686c7cc99 n/a
> (/home/flex/core-1.5.0-SNAPSHOT/lib/native/libzmq.so.5)
> #3 0x00007f56d26255a0 _IO_2_1_stderr_ (libc.so.6)
>
>
> Before I stop my application I disconnect from ALL publishers with
>
> zsock_disconnect(subscriber, "tcp://%s:%d", c_ip, port);
>
> after that I destroy my sockets and actors
>
> zsock_destroy(&publisher);
> zsock_destroy(&req);
> zsock_destroy(&subscriber);
>
> //this is never finished
> zactor_destroy(&actorRep);
> zactor_destroy(&actorSub);
>
>
> I guess its a problem with stopping the actors, how do I propperly
> stop
> this actor?
>
> void sub_actor(zsock_t *pipe, void *args) {
> zsock_signal(pipe, 0);
> while (!zsys_interrupted) {
> char* topic;
> char* timestamp;
> char* value;
> char* id;
> zsock_recv(subscriber, "ssss", &topic, ×tamp, &id,
> &value);
>
> onMessageReceived(topic, timestamp, id,value);
> }
> }
>
> Thanks Florian
As the docs say, the zactor function must listen for $TERM on the pipe
zsock_t:
http://czmq.zeromq.org/czmq4-0:zactor
https://github.com/zeromq/czmq#czmq-actors
zactor_destroy() from the parent will, under the hood, send the $TERM
message and wait for the zactor to correctly close.
--
Kind regards,
Luca Boccassi
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