What is a possible cause for the failure of an integration inserting orders periodically?

When considering the failure of an integration that inserts orders periodically, record locking contention on the parent Account can significantly impact the transaction's success. In Salesforce, whenever a record is updated or deleted, a lock is placed on it to ensure data integrity and prevent simultaneous modifications. If multiple transactions try to access the same parent Account record, it could lead to record locking issues, causing the insertion of new orders to fail. Such contention can occur if there are numerous related orders being processed at the same time, which vying for access to the same parent Account record.

The other options, while they may contribute to integration failures under different circumstances, do not specifically address the nature of record locking in relation to parent-child relationships effectively. For instance, exceeding API limits could halt integration but wouldn’t be tied to the transactional conflicts stemming from record locking, which is often linked to how records interact with each other within the database. Understanding the implications of record locking is crucial when dealing with integrated systems that frequently interact with parent-child data relationships in Salesforce.