Does anyone understand why the Java SDK throws a 409 Conflict error when attempting to update participant attributes on an active voice interaction?
I am building a Spring Boot service that synchronizes external CRM data with Genesys Cloud participant attributes in real-time. The service listens to interaction events and triggers an update via the REST API. I am using the official PureCloudPlatformClientV2 Java SDK version 23.10.0.
The documentation for Updating Interaction Attributes states: “You can update attributes for any interaction type. For voice interactions, attributes are updated on the participant level.”
Here is the relevant code snippet from my service layer:
InteractionsApi interactionsApi = new InteractionsApi(apiClient);
UpdateInteractionAttributesRequest body = new UpdateInteractionAttributesRequest();
body.setAttributes(new HashMap<>());
body.getAttributes().put("crmCaseId", "123456789");
body.getAttributes().put("priorityLevel", "high");
try {
interactionsApi.postInteractionsInteractionIdAttributes(interactionId, body);
} catch (ApiException e) {
log.error("Failed to update attributes: {}", e.getMessage());
}
The error response I receive consistently is:
HTTP/1.1 409 Conflict
{
"errors": [
{
"code": "CONFLICT",
"message": "The interaction has changed since the last fetch. Please retry with the latest version."
}
]
}
I assumed that POST /api/v2/interactions/{interactionId}/attributes does not require a version check like PUT operations do, as it is technically a POST. However, the error message explicitly mentions a version conflict. Is there a specific header or request body field I am missing to handle optimistic locking for this endpoint? Or is this a known issue with the Java SDK where it incorrectly expects an If-Match header for this specific POST operation?
My timezone is Asia/Kolkata, so I am hitting this during our peak load testing hours, making it hard to debug in a low-traffic environment.