The following used to work without warnings:
```
nice php extensions/Translate/scripts/ttmserver-export.php --threads=8
25593 0.20 18.0M Forked thread 25594 to handle bootstrapping
25594 0.31 20.0M Cleaning up old entries...
25594 4.77 20.0M Waiting for the index to go green...
25594 4.93 20.0M Green!
25593 5.90 44.0M Forked thread 25595 to handle wiki-betawiki
25593 5.91 44.0M Forked thread 25596 to handle page-Translating:Process
25593 5.91 44.0M Forked thread 25597 to handle page-Translating:Statistics
25593 5.91 44.0M Forked thread 25598 to handle page-Translating:How to start
25593 5.92 44.0M Forked thread 25599 to handle page-User:FuzzyBot
25593 5.92 44.0M Forked thread 25600 to handle page-Project:General disclaimer
25593 5.92 44.0M Forked thread 25601 to handle page-Project:Privacy policy
25593 5.92 44.0M Forked thread 25602 to handle page-Translating:MediaWiki/Statistics in time
PHP Warning: Packets out of order. Expected 1 received 190. Packet size=14744671 in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
PHP Warning: mysqli::query(): MySQL server has gone away in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
PHP Warning: mysqli::query(): Error reading result set's header in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
PHP Warning: Packets out of order. Expected 1 received 255. Packet size=3124963 in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
PHP Warning: mysqli::query(): MySQL server has gone away in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
PHP Warning: mysqli::query(): Error reading result set's header in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
25593 11.71 44.0M Forked thread 25603 to handle page-Translating:Offline
PHP Warning: Packets out of order. Expected 1 received 190. Packet size=14744671 in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
PHP Warning: mysqli::query(): MySQL server has gone away in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
PHP Warning: mysqli::query(): Error reading result set's header in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
25593 12.31 44.0M Forked thread 25604 to handle page-Project list
PHP Warning: Packets out of order. Expected 1 received 255. Packet size=3124963 in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
PHP Warning: mysqli::query(): MySQL server has gone away in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
PHP Warning: mysqli::query(): Error reading result set's header in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
25593 15.16 44.0M Forked thread 25605 to handle page-Translating:Intro
PHP Warning: Error while sending QUERY packet. PID=25605 in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
25593 15.96 44.0M Forked thread 25606 to handle page-Translating:New project
PHP Warning: Error while sending QUERY packet. PID=25606 in /www/dev.translatewiki.net/docroot/w/includes/libs/rdbms/database/DatabaseMysqli.php on line 46
...
```
Tested on latest master and noticed on master ~1 week old.