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epriestley 69538274c1 Garbage collect old daemon records based on modification date, not creation date 
Summary:
Fixes T12720. Currently, old daemon records are collected based on creation date. By default, the GC collects them after 7 days.

After T12298, this can incorrectly collect hibernating daemons which are in state "wait".

In all cases, this could fail to collect daemons which are stuck in "running" for a long time for some reason. This doesn't seem to be causing any problems right now, but it makes me hesitant to do "dateCreated + not running or waiting" since that might make this become a problem, or make an existing problem with this that we just haven't bumped into worse.

Daemons always heartbeat periodically and update their rows, so `dateModified` is always fresh, so collect rows based only on modification date.

Test Plan:
  - Ran daemons (`bin/phd start`).
  - Waited a few minutes.
  - Verified that hibernating daemons in the "wait" state had fresh timestamps.
  - Verified that very old daemons still got GC'd properly.

```
mysql> select id, daemon, status, FROM_UNIXTIME(dateCreated), FROM_UNIXTIME(dateModified) from daemon_log;
+-------+--------------------------------------+--------+----------------------------+-----------------------------+
| id    | daemon                               | status | FROM_UNIXTIME(dateCreated) | FROM_UNIXTIME(dateModified) |
+-------+--------------------------------------+--------+----------------------------+-----------------------------+
| 73377 | PhabricatorTaskmasterDaemon          | exit   | 2017-05-19 10:53:03        | 2017-05-19 12:38:54         |
...
| 73388 | PhabricatorRepositoryPullLocalDaemon | run    | 2017-05-26 08:43:29        | 2017-05-26 08:45:30         |
| 73389 | PhabricatorTriggerDaemon             | run    | 2017-05-26 08:43:29        | 2017-05-26 08:46:35         |
| 73390 | PhabricatorTaskmasterDaemon          | wait   | 2017-05-26 08:43:29        | 2017-05-26 08:46:35         |
| 73391 | PhabricatorTaskmasterDaemon          | wait   | 2017-05-26 08:43:33        | 2017-05-26 08:46:33         |
| 73392 | PhabricatorTaskmasterDaemon          | wait   | 2017-05-26 08:43:37        | 2017-05-26 08:46:31         |
| 73393 | PhabricatorTaskmasterDaemon          | wait   | 2017-05-26 08:43:40        | 2017-05-26 08:46:33         |
+-------+--------------------------------------+--------+----------------------------+-----------------------------+
17 rows in set (0.00 sec)
```

Note that:

  - The oldest daemon is <7 days old -- I had some other older rows but they got GC'd properly.
  - The hibernating taskmasters (at the bottom, in state "wait") have recent/more-current `dateModified` dates than their `dateCreated` dates.

Reviewers: chad, amckinley

Reviewed By: chad

Maniphest Tasks: T12720

Differential Revision: https://secure.phabricator.com/D18024
2017-05-26 09:18:26 -07:00
bin Add a profileimage generation workflow for the cli 2017-03-04 15:43:13 -08:00
conf Support "ssl.chain" in Aphlict configuration 2016-04-14 10:41:21 -07:00
externals Apply the wordwrap() hack for "To" to PHPMailerLite 2017-03-16 10:56:25 -07:00
resources Add a little style to Phriction ToC menu 2017-05-26 09:17:30 -07:00
scripts Add a profileimage generation workflow for the cli 2017-03-04 15:43:13 -08:00
src Garbage collect old daemon records based on modification date, not creation date 2017-05-26 09:18:26 -07:00
support Update rate limiting for APCu and X-Forwarded-For 2017-04-21 20:39:14 -07:00
webroot Add a little style to Phriction ToC menu 2017-05-26 09:17:30 -07:00
.arcconfig Set "history.immutable" to "false" explicitly in .arcconfig 2016-08-03 08:12:49 -07:00
.arclint Begin adding test coverage to GitHub Events API parsers 2016-03-09 09:30:07 -08:00
.arcunit Use the configuration driven unit test engine 2015-08-11 07:57:11 +10:00
.editorconfig Fix text lint issues 2015-02-12 07:00:13 +11:00
.gitignore Make i18n string extraction faster and more flexible 2016-07-04 10:23:30 -07:00
LICENSE Fix text lint issues 2015-02-12 07:00:13 +11:00
NOTICE Update Phabricator NOTICE file to reflect modern legal circumstances 2014-06-25 13:42:13 -07:00
README.md Remove push to IRC from "readme.md" too 2015-10-24 18:39:16 -07:00

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