A subscriber of on Oracle Cloud Infrastructure (OCI) Notifications service topic complained about not receiving messages from the service. Which of the following options can help you debug this issue?

Question

Options

• AIf OCI Notifications service does not receive an acknowledgement from a subscription endpoint, the
• BIf OCI Notifications service does not receive an acknowledgement from a subscription endpoint, the
• CIf OCI Notifications service does not receive an acknowledgement from a subscription endpoint, the
• DIf OCI Notifications service does not receive an acknowledgement from a subscription endpoint, check

• A
  72% (21)
• B
  17% (5)
• C
  3% (1)
• D
  7% (2)

Explanation

The Oracle Cloud Infrastructure Notifications service broadcasts messages to distributed components through a publish-subscribe pattern, delivering secure, highly reliable, low latency and durable messages for applications hosted on Oracle Cloud Infrastructure and externally. Use Notifications to get notified when event rules are triggered or alarms are breached, or to directly publish a message. If Notifications doesn't receive an acknowledgement from a subscription endpoint, the service tries to redeliver messages for up to two hours. This situation can occur when the endpoint is offline. You can configure an alarm on the NumberOfNotificationFailed metric through the Monitoring service

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