Logstash: https://logstash.wikimedia.org/goto/b008afebe545d2e29084acef88631416
We have a bunch of errors such as:
```
ErrorException from line 235 of /srv/mediawiki/php-1.29.0-wmf.12/includes/libs/redis/RedisConnectionPool.php:
PHP Warning: Failed connecting to redis server at rdb1001.eqiad.wmnet: Bad file descriptor
```
First log entry was at 2017-02-21 01:21:42 UTC from SAL:
```
lang=irc
02:24 <l10nupdate@tin> ResourceLoader cache refresh completed at Tue Feb 21 02:24:37 UTC 2017 (duration 5m 20s)
02:19 <l10nupdate@tin> scap sync-l10n completed (1.29.0-wmf.12) (duration: 07m 20s)
01:17 <tstarling@tin> Synchronized wmf-config/InitialiseSettings.php: (no justification provided) (duration: 00m 42s)
20:31 <gehel> taking threaddumps and restarting elastic1017 (high load)
```
Tim Starling patch 9eafbebdd882a562171fd0e46dcd5a9ec1e55cf8 actually enables some more logging which is/was T45086
```
commit 9eafbebdd882a562171fd0e46dcd5a9ec1e55cf8
Author: Tim Starling <tstarling@wikimedia.org>
AuthorDate: Mon Feb 20 19:03:01 2017
Commit: Tim Starling <tstarling@wikimedia.org>
CommitDate: Tue Feb 21 00:54:55 2017
Route PHP warnings from the handler into udp2log
Don't send suppressed errors
Bug: T45086
Change-Id: If34503314d7f359c005d030329111be912a758d9
```