Hi,
I’m using pt-online-schema-change for altering a table on mysql 5.6 on ubuntu 14.10, but with no success.
After “2015-03-12T15:08:06 Dropped new table OK.” I get “bus error (core dumped)”.
This is the command I’m running:
pt-online-schema-change --version-check --user root --password xxxx --database test h=127.0.0.1,t=order_item --alter-foreign-keys-method “rebuild_constraints” --alter “ADD COLUMN refunded_by varchar(255) DEFAULT NULL” --execute
and this is the output:
➜ pt-online-schema-change --version-check --user root --password xxxx --database test h=127.0.0.1,t=order_item --alter-foreign-keys-method “rebuild_constraints” --alter “ADD COLUMN refund_by varchar(255) DEFAULT NULL” --execute
No slaves found. See --recursion-method if host cirpux has slaves.
Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
Operation, tries, wait:
copy_rows, 10, 0.25
create_triggers, 10, 1
drop_triggers, 10, 1
swap_tables, 10, 1
update_foreign_keys, 10, 1
Child tables:
test.sales_order_item_status_history (approx. 1 rows)
test.sales_return (approx. 1 rows)
Will use the rebuild_constraints method to update foreign keys.
Altering test.sales_order_item…
Creating new table…
Created new table test._order_item_new OK.
Altering new table…
Altered test._order_item_new OK.
2015-03-12T15:12:41 Creating triggers…
2015-03-12T15:12:41 Created triggers OK.
2015-03-12T15:12:41 Copying approximately 1671767 rows…
Copying test.sales_order_item: 44% 00:37 remain
Copying test.sales_order_item: 79% 00:15 remain
2015-03-12T15:14:00 Dropping triggers…
2015-03-12T15:14:00 Dropped triggers OK.
2015-03-12T15:14:00 Dropping new table…
2015-03-12T15:14:00 Dropped new table OK.
test.sales_order_item was not altered.
[1] 20420 bus error (core dumped) pt-online-schema-change --version-check --user root --password root --databas
Do you have any suggestions on how to get more information on what’s going on? Or even a solution 
thanks