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cae59d8345
Summary: Fixes T6044. We've had two cases (both the same install, coincidentally) where pages got hung doing too much data fetching. When pages hang, we don't get a useful stack trace out of them, since nginx, php-fpm, or PHP eventually terminates things in a non-useful way without any diagnostic information. The second time (the recent Macros issue) I was able to walk the install through removing limits on nginx, php-fpm, php, and eventually getting a profile by letting the page run for several minutes until the request completed. However, this install is exceptionally technically proficient and this was still a big pain for everyone, and this approach would not have worked if the page actually looped rather than just taking a long time. Provide `debug.time-limit`, which should give us a better tool for reacting to this situation: by setting it to a small value (like 10), we'll kill the page after 10 seconds with a trace, before nginx/php-fpm/php/etc can kill it uselessly. Hopefully that will be enough information to find the issue (generally, getting a trace has been 95% of the problem in the two cases we've encountered). Test Plan: Set this option to `3` and added a sleep loop, saw a termination after 3 seconds with a useful trace. Reviewers: btrahan Reviewed By: btrahan Subscribers: csilvers, joshuaspence, epriestley Maniphest Tasks: T6044 Differential Revision: https://secure.phabricator.com/D10465 |
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