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Resolving Cart API Error: GENERIC_PRODUCT_SERVICE_EXCEPTION (Code 209)

Udgivelsesdato: Apr 13, 2026
Beskrivelse

When executing a Cart API, the system may return a GENERIC_PRODUCT_SERVICE_EXCEPTION with error code 209. This failure indicates a breakdown in the communication between the API and its underlying logic handlers.

Reviewing the Managed Package Debug Logs for the affected user identifies the root cause. If the following log statements are present, the issue is attributed to the absence of an active implementation class for the required interface:

  • common.apex.runtime.impl.ExecutionException: Attempt to de-reference a null object

  • METHOD_ENTRY|...|vlocity_cmt.Logger.dbg(Object)

  • VARIABLE_ASSIGNMENT|ob|"!! No implementation ..."

This null pointer exception occurs because the application logic attempts to call a method on an interface that has no valid, active class mapped to it within the organization.

Løsning

The issue is resolved by ensuring the correct implementation classes are mapped and active. If mappings are missing, the Interface Implementation Maintenance job must be executed.

1. Verify Interface Implementations

  1. Navigate to the App Launcher and search for Interface Implementations.
  2. Review the list to ensure each Interface Name has a corresponding Active Implementation Class.
  3. Specifically verify the interface related to the failing functionality.

Example:

    • API Name: getCartsProducts
    • Interface Name: CpqAppHandler
    • Active Implementation Class: DefaultCpqAppHandlerImplementation

2. Execute Maintenance Job: If the required implementation classes are not found or mapped, follow these steps to restore them:

  1. Search for Vlocity CMT Administration in the App Launcher.
  2. In the Admin Console section, select Maintenance Jobs.
  3. Locate and run the INTERFACE IMPLEMENTATION MAINTENANCE (MERGE) job.
  4. This job populates and synchronizes the implementation classes for both general and functionality-specific interfaces.

3. Validation: After the maintenance job completes:

  1. Confirm that the Implementation Class is correctly mapped to the Interface Name and marked as Active.
  2. Re-execute the Cart API or the specific functionality that previously triggered the exception.

If the error persists, further diagnostic logs should be captured to identify additional exceptions or missing configurations.

Vidensartikelnummer

000394665

 
Indlæser
Salesforce Help | Article