die on DBI error such as a failure to update heartbeat table

[joemiller]

If you are running pt-heartbeat in daemon mode with --update and the heartbeat table is removed (eg: mistakenly by an admin, or other) then pt-heartbeat will continuously spin with an error such as:

Nov 13 01:06:02 hostname [email protected][9519]: Table 'database._pt_heartbeat' doesn't exist [for Statement "UPDATE `pantheon`.`_pt_heartbeat` SET ts=?, file=?, position=?, relay_master_log_file=?, exec_master_log_pos=? WHERE server_id='2272608305'" with ParamValues: 0='2015-11-13T01:06:02.001110', 1='mysql-bin.000005', 2='366399508', 3=undef, 4=undef]

Instead, we would prefer that it exit()'d with error which would allow for the supervisor to restart the process which would re-create the table if the create-table option was specified.

[Hornswoggles]

+1

[it-percona]

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[svetasmirnova]

You can have the same behavior if you use the option --fail-successive-errors.