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Errors With High Volumes Of Logging Data Causing Some Data Not To Be Written / Audit Log File Lock (Doc ID 2011337.1)

Last updated on FEBRUARY 26, 2019

Applies to:

Oracle API Gateway - Version 11.1.2.1.0 and later
Information in this document applies to any platform.

Symptoms

OAG 11.1.2.1.0 in a cluster with 8 Gateway instances. Patch 18330643 is applied.
Virtualized environment with the 8 Gateway instances on 2-3 physical hosts (exact number unknown).

An A10 load balancer is in front of the Gateway instances.
That load balancer was upgraded recently.

In the policy, a Throttling filter limits the number of requests from the load balancer to 30 requests/second.

Problem:
=======
Intermittently, connections from the load balancer get dropped.
Subsequently, many requests are coming in concurrently.
This then triggers a Throttling filter in customer's policy which causes the requests to appear to fail.

Example messages for the initial problem:


The problem has been observed on all 8 Gateway instances.

The problem can disappear on its own after a few minutes, or it can last for hours.

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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