Datasource precedence rules ignoring Discovery Source and System-based fields

Issue

Data source precedence rules have been defined in case multiple data sources are authorized to update the same table or the same table attributes in the CMDB, however the Discovery Source or system-based fields are updated regardless, ignoring these rules. These fields are:

discovery_source

sys_class_name

sys_class_path

sys_created_by

sys_created_on

sys_domain

sys_domain_path

sys_id

sys_mod_count

sys_updated_by

sys_updated_on

Cause

IRE (Identification and Reconciliation Engine) does not reconcile system fields. Hence, by design lower priority datasource is able to update sys-based fields. It should also update the discovery_source field.

Resolution

You can use a simple payload like the one below to verify that reconciliation is working for non system or discovery source fields. Run the background script code multiple times with different values for serial number and data source.

var payload = {
"items": [
{
"className": "cmdb_ci_computer",
"values": {
"serial_number": “testr23456”,
"name": “testr234”
},
"related": []
}
],
"relations": []
};

var input = new JSON().encode(payload);
var output = SNC.IdentificationEngineScriptableApi.createOrUpdateCI(‘Service-now’, input);
gs.print(output);