Bug #78485 [Opn->Fbk]: Random "couldn't resolve host" failures in curl_multi

Edit report at https://bugs.php.net/bug.php?id=78485&edit=1 ID: 78485 Updated by: cmb@php.net Reported by: sinus at sinpi dot net Summary: Random "couldn't resolve host" failures in curl_multi -Status: Open +Status: Feedback Type: Bug Package: opcache Operating System: CloudLinux -PHP Version: 7.2.22 +PHP Version: 7.3.9 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: Is this still an issue with any of the actively supported PHP versions[1]? [1] <https://www.php.net/supported-versions.php> Previous Comments: ------------------------------------------------------------------------ [2019-09-06 14:27:52] sinus at sinpi dot net Oddly enough, enabling or disabling of any PHP modules was causing the errors to either visibly decrease, or just as significantly increase in frequency. Updating to PHP 7.3.9, still cURL 7.62.0, stabilized the issue enough to say: enabling opcache causes failures to create getaddrinfo threads. ------------------------------------------------------------------------ [2019-09-03 15:43:27] sinus at sinpi dot net The situation develops. Disabling the opcache module made the issue go away entirely! ------------------------------------------------------------------------ [2019-09-03 09:26:09] sinus at sinpi dot net I now added CURLOPT_VERBOSE output to the bug.php script, and it demonstrated the failing handle throwing the following at me: * getaddrinfo() thread failed to start The plot thickens. ------------------------------------------------------------------------ [2019-09-02 21:17:57] sinus at sinpi dot net Seeing as I've never seen this happen on my previous host, I suspect it's a conflict with some local setup, not a bug in curl itself - but it'd be nice if there was a way to find out what could possibly cause it to behave like that. ------------------------------------------------------------------------ [2019-09-02 20:54:23] sinus at sinpi dot net You might have to reload it a few times, as I said, it's pretty random. Reproductions of the bug are seen as "Msg: 6 for handle <x>". ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=78485 -- Edit this bug report at https://bugs.php.net/bug.php?id=78485&edit=1