I have a custom module, report_feedbackviewer (not in the plugins db, but will be soon). It aggregates all student feedback (from mod_feedback) from a course in a single view. I've written Behat tests to cover the interface. These tests are provoking a nasty MySQL error, but only on some parts of the testing matrix. See https://travis-ci.org/LafColITS/moodle-report_feedbackviewer/builds/95423420 for the latest failure. Given Moodle 2.9-3.0, PHP 5.4-5.6, and MySQL and PostgreSQL, the build fails on Moodle 3.0, PHP 5.4 and 5.5, MySQL only. I've googled "Warning: Error while sending QUERY packet", but there isn't much information and what I did find points to the max_allowed_packet value for MySQL being too low, which seems implausible. I did try changing the packet size, but it didn't make a difference. Has anyone seen an issue like this before?