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Bug #47477 [PATCH] php_curl_stream_read() unnecessarily sleeps 15 secs under heavy load
Submitted: 2009-02-23 09:40 UTC Modified: 2009-02-23 15:58 UTC
From: g dot bonacci at libero dot it Assigned:
Status: Closed Package: cURL related
PHP Version: 5.*CVS, 6CVS (2009-02-23) OS: *
Private report: No CVE-ID: None
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From: g dot bonacci at libero dot it
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 [2009-02-23 09:40 UTC] g dot bonacci at libero dot it 
Description:
------------
php_curl_stream_read() in ext/curl/streams.c always calls select() after firing up a connection.  

however, when the php client is under heavy load, the server might have already responded, and the last call to curl_multi_perform() before entering the loop might have received all the data and closed the connection.  

at this point, curl_multi_fdset() in the loop returns maxfs == -1, and the following select turns into a pointless 15 sec sleep. 

please see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=514832
for reference.

a patch is available at
http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=php.curlstream.patch;att=1;bug=514832

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AllCommentsChangesGit/SVN commitsRelated reports
 [2009-02-23 15:58 UTC] iliaa@php.net 
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.
 [2009-07-25 13:09 UTC] svn@php.net 
Automatic comment from SVN on behalf of jani
Revision: http://svn.php.net/viewvc/?view=revision&revision=284748
Log: - Merge from PHP_5_3:
r280810 | kalle: Fixed compiler warnings
r276286 | iliaa: Fixed bug #47477 (php_curl_stream_read() unnecessarily sleeps 15 secs under heavy load)
 
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