by Robert Clements.
I am having the same issue and my system admin at the hosting company has changed the max_allowed_packet to max_allowed_packet=500M and still I get this error.
3.62 secs
Error reading from database
More information about this error
Debug info: MySQLserver has gone away
SELECT count(r.repositoryid)
FROM mdlua_files f
LEFT JOIN mdlua_files_reference r
ON r.id = f.referencefileid
JOIN mdlua_backup_ids_temp bi
ON f.id = bi.itemid
WHERE bi.backupid = ?
AND bi.itemname = 'filefinal'
[array (
0 => '57d19b6e4a02d510ffffbb3f125ab53b',
)]
Error code: dmlreadexception
Stack trace:
line 443 of /lib/dml/moodle_database.php: dml_read_exception thrown
line 1080 of /lib/dml/mysqli_native_moodle_database.php: call to moodle_database->query_end()
line 1480 of /lib/dml/moodle_database.php: call to mysqli_native_moodle_database->get_records_sql()
line 1553 of /lib/dml/moodle_database.php: call to moodle_database->get_record_sql()
line 1763 of /lib/dml/moodle_database.php: call to moodle_database->get_field_sql()
line 516 of /backup/util/dbops/backup_controller_dbops.class.php: call to moodle_database->count_records_sql()
line 1847 of /backup/moodle2/backup_stepslib.php: call to backup_controller_dbops::backup_includes_file_references()
line 34 of /backup/util/plan/backup_execution_step.class.php: call to backup_store_backup_file->define_execution()
line 181 of /backup/util/plan/base_task.class.php: call to backup_execution_step->execute()
line 177 of /backup/util/plan/base_plan.class.php: call to base_task->execute()
line 120 of /backup/util/plan/backup_plan.class.php: call to base_plan->execute()
line 320 of /backup/controller/backup_controller.class.php: call to backup_plan->execute()
line 136 of /backup/util/ui/backup_ui.class.php: call to backup_controller->execute_plan()
line 131 of /backup/backup.php: call to backup_ui->execute()
I have also attached a copy of the my.cnf file in a txt file format so you can see if there is anything else we are missing.