I have many schedulers which run in background. Few schedulers import thousand of orders daily from different e-commerce channels. These orders are validated and delivered based on order status in Odoo. 

We also create manual refund through Odoo system. Sometimes we get concurrency error when schedulers run in background. This time we got different error of resource sharing.

2015-05-15 18:32:04,222 3333 ERROR DB_Name openerp.sql_db: bad query: SELECT number_next FROM ir_sequence WHERE id=42 FOR UPDATE NOWAIT

Traceback (most recent call last):

File "/path_to_odoo/openerp/sql_db.py", line 234, in execute

res = self._obj.execute(query, params)

OperationalError: could not obtain lock on row in relation "ir_sequence"

When I looked into ir_sequence table I found id 42 is linked with Customer Payments.

id | create_uid | code | create_date | suffix | number_next | number_increment | implementation | company_id | write_uid | padding | active | prefix | write_date | name

----+------------+------+----------------------------+--------+-------------+------------------+----------------+------------+-----------+---------+--------+----------------+----------------------------+------

42 | 1 | | 2014-10-24 10:48:30.265072 | | 197736 | 1 | no_gap | 1 | 1 | 4 | t | BNK2/%(year)s/ | 2014-10-24 10:48:30.265072 | Bank

Can anyone help me to know why threads are not releasing resource after granting lock? Is there any work around for above problem?