A.3 Error Code 502

Associated Error Category

Binding Found But Unable To Route

Description

Request message is received and a binding with a PRCF was found. Policy DRA can't route the request to PCRF due to DSR queue full error.

Associated P-DRA Alarm/Event

Event 22707 - Diameter Message Processing Failure (refer to the DSR Alarms and KPIs Reference for details about this event)

Associated Measurement

RxRequestMsgQueueFullDiscard

Associated Diameter Interface / Message Type

• Gx/Gxx CCR-I
• Rx AAR
• Gx-Prime CCR-I

GUI Configurable

Yes

Recovery

1. See findSessionRef Processing in the Error Resolution appendix of the Policy and Charging Application User Guide to investigate and understand the circumstances where this error occurs.
2. Go to the PCA NOAM GUI to collect information for possible root causes that may resort in the DRL queue being full:
   • Go to Main Menu, and then Status & Manage, and then Server to verify is some DA-MPs have failed. If some servers on the same side fail, the traffic will be distributed amongst the remaining DA-MPs).
   • Go to Main Menu, and then Status & Manage, and then KPIs to check the ingress traffic rates of the DA-MPs. Each DA-MP in the site should have about the same ingress rate in normal situation.
   • Go to Main Menu, and then Alarms & Events, and then View History to search for relevant congestion alarms. The Display Filter may be set as Timestamp or Server to include P-DRA, DRL, or DCL alarms.
3. Go to Main Menu, and then Measurements, and then Report to obtain the measurement report for all relevant measurements.