Attempt to write vertex but there is already such a record written

Products

• CA Application Performance Management Agent (APM / Wily / Introscope)
• INTROSCOPE

Issue/Introduction

Post upgrade from APM 9.7 to 10.5.1, now seeing the following [WARN] message in the Manager of Manager (MOM)'s IntroscopeEnterpriseManager.log:

[WARN] [AppMapAsyncExecutor-4] [Manager.AppMap] Attempt to write vertex (externalId = INFERRED_SOCKET:SOCKET:abc-vip:1521:abc-vip) at 2017-05-22 17:40:56.091, but there is already such a record written at 2017-05-22 17:41:04.593
[{"name":"agentHostName","value":"nzttsmsdux001","type":"GATHERED","owner":null},{"name":"hostname","value":"abc-vip","type":"GATHERED","owner":null},{"name":"inferredBackendNode","value":"true","type":"GATHERED","owner":null},{"name":"name","value":"SOCKET:abc-vip:1521","type":"GATHERED","owner":null},{"name":"type","value":"INFERRED_SOCKET","type":"GATHERED","owner":null}]
[{"name":"agentHostName","value":"def","type":"GATHERED","owner":null},{"name":"hostname","value":"abc-vip","type":"GATHERED","owner":null},{"name":"inferredBackendNode","value":"true","type":"GATHERED","owner":null},{"name":"name","value":"SOCKET:abc-vip:1521","type":"GATHERED","owner":null},{"name":"type","value":"INFERRED_SOCKET","type":"GATHERED","owner":null}]

Environment

Application Performance Management 10.x

Cause

The warning message indicates that agents are trying to add data to the APM Team Center, but the data had already been written. This is usually due to a time zone conflict between the MOM, collectors and Agents.

Resolution

To address this, make sure that the MOM and all Collectors are using the same time source to synchronize with (NTP). 

Additional Information