Scripted Web Service Uses: var cart = new Cart(); and Some Records are Not Created As Expected When Making Multiple Calls in a Short Period of Time - Support and Troubleshooting

Scripted Web Service Uses: var cart = new Cart(); and Some Records are Not Created As Expected When Making Multiple Calls in a Short Period of Time Issue Several inbound web service calls are made into a scripted web service in a short period of time. For some of the calls the expected record is not created (sc_request table) and no record number is returned to the client.

The following is seen for some of the calls in the node logs:

2019-12-17 12:05:52 (488) API_INT-thread-4 F9F5A2D5DBF5849026A25C77DC96190B txid=f1f5a2d5dbf5 *** Script: Can not checkout empty cart 2019-12-17 12:05:52 (489) API_INT-thread-4 F9F5A2D5DBF5849026A25C77DC96190B txid=f1f5a2d5dbf5 *** Script: CP Submit API: {}

The scripted web service uses the Cart API, e.g.:

var cart = new Cart();

Cause A race condition is created by calling the Cart API multiple times for the same user in a short period of time.

Resolution To resolve this issue consult this blog post:

https://community.servicenow.com/community?id=community_blog&sys_id=38ccee25dbd0dbc01dcaf3231f961977

The current coding is causing a race condition, i.e.:

var cart = new Cart();

You will need to follow that blog and create a unique cart ID:

var cart = new Cart(generateId());

OR

var cartId = GlideGuid.generate(null); var cart = new Cart(cartId);