Question

Have just got a surprise and would appreciate some suggestions.
The simple query below updates a table. I have used it severally without qualms but now it does not work as usual causing the MySQL server to go away. What could be responsible. Thanks.

UPDATE rmc_raw_data 
    INNER
    JOIN handover_main
        ON handover_main.handover_time = rmc_raw_data.rmc_time
        AND handover_main.handover_date = rmc_raw_data.rmc_date
        SET rmc_raw_data.handovers = 'Handover'

Answer 1

Increase the timeout of the session. It’s most likely set to 5 minutes or so which is too short for long running queries.

Here are the details from the mysql documentation:
http://dev.mysql.com/doc/refman/5.1/en/gone-away.html

Here are the details for changing the timeout options:
http://dev.mysql.com/doc/refman/5.1/en/mysql-options.html