Re: [Chicken-users] (seemingly) random disconnects of zmq sockets

[Kristian Lein-Mathisen]

Hi Karsten,

It's a little hard to figure out why that socket all of a sudden just dies. Perhaps you could make a smaller example where this bug is reproducable?

There is a branch where we're trying to update the bindings to work against zmq version 3.2:
https://bitbucket.org/DerGuteMoritz/zmq/commits/branch/3.2

In this version, the glue-code has been simplified quite a lot and perhaps that solves your problem. You could try against this zmq egg-version and let us know if that helps!

K.

On Mon, Aug 19, 2013 at 10:20 PM, Karsten Gebbert <address@hidden> wrote:

Hi List,

I'm having a strange problem with the zmq egg with the following program:

http://paste.call-cc.org/paste?id=1c0c94e23600b68e8100d6c5913f58368c01f02c

Basically, I have two sockets, one 'push for sending to a node.js process (with the zmq module compiled against 2.1 series, too) and one 'pull for getting data from the same node.js process. After a while of fiddling around, the CHICKEN process quits with this error:

Warning (#<thread: thread4>): in thread: (receive-message) Socket operation on non-socket: 88

        Call history:

        seq-ipc.scm:31: loop     
        seq-ipc.scm:29: with-input-from-string   
        seq-ipc.scm:30: update-track     
        seq-ipc.scm:19: alist-ref        
        seq-ipc.scm:20: alist-ref        
        seq-ipc.scm:21: alist-ref        
        seq-ipc.scm:21: alist-update!    
        seq-ipc.scm:31: zmq#receive-message*            <--

Error: (send-message) Socket operation on non-socket: 88

        Call history:

        main.scm:32: modulo      
        main.scm:39: g224        
        main.scm:40: alist-ref   
        main.scm:41: alist-ref   
        main.scm:41: alist-ref    
        ....
        main.scm:53: thread-sleep!       
        main.scm:54: midi#bar-in-ms      
        main.scm:56: main-loop   
        main.scm:32: midi#sixteenth-by-bpm       
        main.scm:32: modulo      
        main.scm:34: midi#bar-in-ms      
        main.scm:36: number->string      
        main.scm:36: zmq#send-message           <--

It seems as though the sockets have been disconnected as errno is 88, which grep tells me is defined as such:

/usr/include/asm-generic/errno.h:61:#define     ENOTSOCK        88      /* Socket operation on non-socket */

I wonder what could cause the sockets to magically close on me. Anyone an idea? I'd really appreciate any hints how to debug this best, it does seem a little intractable :/

Cheers,

Karstn

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