Hi folks,

I'm using the curl_multi interface to make parallel GET requests on a set
of URLs. I've noticed that at times the call to curl_multi_wait may block
indefinitely, despite the fact that I'm passing in a value of 1000 (msec)
to the timeout_ms parameter. Some snippets from my debugger:

00000000`0933e5d0 00000001`3f5233d4 ws2_32!select+0x75a
00000000`0933e6d0 00000001`3f4fcb28 mag_client!Curl_poll+0x234
[c:\curl-7.28.1\lib\select.c @ 474]
00000000`0933eda0 00000001`3f31f653 mag_client!curl_multi_wait+0x1d8
[c:\curl-7.28.1\lib\multi.c @ 1029]

I've stumbled across a perhaps relevant blog
post<http://daniel.haxx.se/blog/2012/10/10/wsapoll-is-broken/>,
which could be related.

By the way, this was seen on Win7 and my app is using a libcurl 7.28.1,
statically linked.

Thanks!

-- 
Alex Loukissas
Member of Technical Staff - Maginatics, Inc.
www.maginatics.com

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Received on 2013-05-07