[zeromq-dev] assertion failed on zsocket_connect with ZMQ_REQ

[Bachmair Florian - flexSolution GmbH]

ok that was not (my only) problem.
It is also during execution.

How can I print the strerror?

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

does not print anything for me

Am 19.05.2015 um 11:23 schrieb 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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>>>>>
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