When does the Bulk API place a batch in the queue for later processing?

The Bulk API processes records in batches for efficient data handling, particularly when dealing with large data volumes. A batch is placed in the queue for later processing when more than 100 records fail. This condition helps to manage potential issues that arise from processing a batch with a significant number of failures. By using this criterion, the Bulk API prevents the system from spending resources on processing failed batches, allowing for better error handling and providing the opportunity for the user to address the issues before attempting to reprocess the data.

When the Bulk API detects that a significant number of records within a batch have failed, it ensures that it doesn't continue to attempt to process something that could lead to further complications. This queuing strategy facilitates smoother data migration and management activities, making it an essential feature for integrating Salesforce with external systems where data integrity is critical.