Hi thanks - yes indeed this did turn out to be the cause of the issue.
We'll upgrade the curl on centos to a version where the blocking NSS
has been fixed.

Thanks!

On Tue, May 9, 2017 at 10:15 PM, Aleksandar Lazic
<al-curllibrary_at_none.at> wrote:
> Hi Sean Bollin.
>
> Sean Bollin have written on Tue, 9 May 2017 15:24:50 -0700:
>
>> I've got an issue in our application when I fire off a few dozen HTTPS
>> requests curl_multi_perform is blocking for 15+ seconds.
>>
>> I took this example and modified it to just make 30 HTTPS requests:
>> https://curl.haxx.se/libcurl/c/multi-app.htm
>>
>> When I compile multi-app and link it to the libcurl 7.29.0 installed
>> on RedHat at the system level (using just gcc multi-app.c -lcurl) I
>> can reproduce this long pause of 15+ seconds.
>>
>> Next, if I download libcurl 7.42 or even the same version 7.29 and
>> build that myself, and link against it, I'm able to get the requests
>> to fire off in 1-2 seconds total.
>
> Which ssl library do you use when you compile by your own?
> The curl on centos is build with nss.
>
> Regards
> Aleks
>
>> I've tried enabling/disabling AsyncDNS via c-ares as that was a
>> difference I noticed between the system level library and the ones I
>> compiled manually but it didn't have any effect.
>>
>> Currently I am stumped as to how to continue. Any ideas on how to
>> debug this or what to check?
>>
>> Let me know if I can provide any further info.
>> -------------------------------------------------------------------
>> Unsubscribe: https://cool.haxx.se/list/listinfo/curl-library
>> Etiquette: https://curl.haxx.se/mail/etiquette.html
-------------------------------------------------------------------
Unsubscribe: https://cool.haxx.se/list/listinfo/curl-library
Etiquette: https://curl.haxx.se/mail/etiquette.html
Received on 2017-05-10