[zeromq-dev] assertion failed on zsocket_connect with ZMQ_REQ

[Bachmair Florian - flexSolution GmbH]

like that?

int rc = zsocket_connect(req, "%s", addr);
zmq_strerror (zmq_errno ());
assert(rc == 0);

this does not work.

But I think I found the problem.
I start both applications at the same time, so the socket may not yet be initialized by the oponent.



Am 19.05.2015 um 10:22 schrieb Pieter Hintjens:
> The problem is that the endpoint is rejected by your operating system
> as "invalid" for some reason; possibly networking is switched off. You
> can print strerror (errno) or zmq_strerror (zmq_errno ()) to see the
> actual error message.
>
> On Tue, May 19, 2015 at 10:14 AM, Bachmair Florian - flexSolution GmbH
> <florian.bachmair at flexsolution.eu> wrote:
>> 'addr' is tcp://127.0.0.1:9998
>> so the problem may be that the other side of the socket has crashed?
>>
>> I see that I do not close the 'req' Socket, could this be a problem?
>>
>> Am 19.05.2015 um 09:59 schrieb Pieter Hintjens:
>>> zsocket_connect does not block. It returns -1 if the endpoint is
>>> invalid, which presumably it is. Could you tell us what the value of
>>> 'addr' is ?
>>>
>>> On Tue, May 19, 2015 at 9:40 AM, Bachmair Florian - flexSolution GmbH
>>> <florian.bachmair at flexsolution.eu> wrote:
>>>> hi!
>>>>
>>>> Sometimes I get an assertion failed in my code.
>>>> Why is this? shouldn't it block, till a connection is established?
>>>>
>>>>
>>>>
>>>> NIEXPORT jstring JNICALL Java_eu_flexsolution_core_JNI_1zeromq_request(
>>>>           JNIEnv *env, jobject object, jstring address, jstring timestamp,
>>>>           jstring format, jstring command, jstring message) {
>>>>       const char* addr = (*env)->GetStringUTFChars(env, address, 0);
>>>>       const char* ts = (*env)->GetStringUTFChars(env, timestamp, 0);
>>>>       const char* f = (*env)->GetStringUTFChars(env, format, 0);
>>>>       const char* cmd = (*env)->GetStringUTFChars(env, command, 0);
>>>>       const char* msg = (*env)->GetStringUTFChars(env, message, 0);
>>>>
>>>>       printf("REQ:%s:%s:%s:%s:%s\n", addr,cmd, msg, f, ts);
>>>>       fflush(stdout);
>>>>       void *req = zsocket_new(context, ZMQ_REQ);
>>>>       int rc = zsocket_connect(req, "%s", addr);
>>>>       assert(rc == 0);
>>>>       s_sendmore(req, ts);
>>>>       s_sendmore(req, f);
>>>>       s_sendmore(req, cmd);
>>>>       s_send(req, msg);
>>>>
>>>>       char* reply = s_recv(req);
>>>>       printf("reply: %s\n", reply);
>>>>       fflush(stdout);
>>>>
>>>>       (*env)->ReleaseStringUTFChars(env, timestamp, ts);
>>>>       (*env)->ReleaseStringUTFChars(env, format, f);
>>>>       (*env)->ReleaseStringUTFChars(env, message, msg);
>>>>
>>>>       jstring ret = (*env)->NewStringUTF(env, reply);
>>>>       return ret;
>>>> }
>>>>
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