Sales Order Visualforce Error: “Remoting response size exceeded maximum of 15 MB” (CloudSense / Salesforce)

Error / Symptom

A blocking alert appears immediately when the Sales Order Visualforce UI loads:

“<your_instance.domain.com> says: Remoting response size exceeded maximum of 15 MB.”

This prevents the Sales Order page (often the record/Line Items experience) from rendering and being usable for order management.

Environment

• Salesforce org type: commonly observed in Full Sandbox (can also occur in Production if the payload grows).
• CloudSense package version reported by the customer: R37.

Root Cause

Salesforce Visualforce remoting enforces a maximum response size of 15 MB. During Sales Order UI initialization, the CloudSense managed package queries and returns csmso__Node_Advert_Assignment__c data to the Visualforce page. If the combination of:

• Record volume (e.g., tens of thousands of records), and
• Field selection + field data size (number of fields and the amount of data stored in those fields)

produces a serialized response larger than 15 MB, Salesforce throws the remoting size error and the UI becomes blocked.

Where the field list comes from (CloudSense configuration)

The managed package determines which fields are retrieved/returned based on configuration stored in:

• csmso__SalesOrderAPI__c
  • csmso__Node_Advert_Assignment_Fields__c (a configurable, comma-separated list of field API names)

Payload size can grow over time as more csmso__Node_Advert_Assignment__c records are created/retained and/or additional fields are added to the configured field list (or existing fields begin storing larger values).

How to Diagnose

1. Confirm the exact error message

   Verify users see: “Remoting response size exceeded maximum of 15 MB.”

2. Confirm it occurs during Sales Order load

   Reproduce by opening an affected Sales Order and confirming the alert appears immediately on initial load.

3. Check Node Advert Assignment data volume

   Review the approximate count of csmso__Node_Advert_Assignment__c records in the org. Larger volumes (for example, ~20k+) increase the risk of exceeding the 15 MB response limit depending on field selection and data sizes.

4. Review the configured field list

   Inspect csmso__SalesOrderAPI__c.csmso__Node_Advert_Assignment_Fields__c. More fields returned (and larger field values) increase the remoting payload size.

Solution / Mitigation

Option A (Preferred): Reduce the number of returned records by cleaning up unused data

1. Identify unused csmso__Node_Advert_Assignment__c records

   Determine which Node Advert Assignments are no longer required for current catalog/configurator behavior.

2. Delete or otherwise remove unused records

   • Perform cleanup in Full Sandbox first to validate behavior and avoid unintended functional impact.
   • Keep only records that are required for Sales Order configuration and order management.

3. Re-test Sales Order load

   Open multiple Sales Orders and confirm the page loads without the 15 MB remoting error.

Why this works: fewer records returned → smaller remoting response → stays under Salesforce’s 15 MB limit.

Option B: Reduce the number of fields returned (only if feasible)

If business logic permits, reduce the configured fields in:

• csmso__SalesOrderAPI__c → csmso__Node_Advert_Assignment_Fields__c

Then re-test Sales Order load.

Why this works: fewer fields (and/or smaller fields) → smaller payload per record → smaller total response.

Platform limitation note

This behavior aligns with a Salesforce Visualforce remoting platform limit (15 MB), not a CloudSense defect. No package version change is required to implement the mitigations above.

Production Risk Considerations

• Similar record counts between Sandbox and Production do not guarantee identical payload size.
• The 15 MB limit is based on serialized payload size, which depends on both record count and the actual data sizes in returned fields (text lengths, populated vs. null values, and which fields are configured).
• If Production is close to the threshold, proactive cleanup of unused csmso__Node_Advert_Assignment__c records reduces the risk of a sudden outage as data grows.

Verification Checklist

• No alert appears: “Remoting response size exceeded maximum of 15 MB.”
• Sales Order UI loads successfully across multiple Sales Orders (not just one).
• Line items / configurator initialization completes without blocking pop-ups.
• Data cleanup did not remove records required for valid configurations (perform functional regression checks in Sandbox before Production changes).