Stuck on a specific edge case while deploying our latest AppFoundry Premium App for automated outreach. The integration handles outbound messaging via the /api/v2/messaging/conversations endpoint. We are seeing a surge in 409 Conflict responses when multiple tenants attempt to initiate conversations for the same external contact ID simultaneously.
The error payload looks like this:
{
“code”: “duplicateConversation”,
“message”: “A conversation already exists for this participant”,
“status”: 409,
“details”: “Cannot create new conversation when an active session exists for user: +15550199888”
}
Our current retry logic waits 5 seconds and retries, but this creates a bottleneck during peak loads in the US West region. The documentation suggests checking for existing conversations, but polling /api/v2/messaging/conversations by participant ID adds significant latency to the flow. Is there a more efficient way to handle idempotency keys or detect active sessions without a full lookup? We need to ensure no messages are dropped while keeping the API call count within our rate limits.