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EM 12c, 13c: ASM Cluster And ASM Instances are Shown as DOWN incorrectly in EM Console (Doc ID 2654688.1)

Last updated on APRIL 01, 2020

Applies to:

Enterprise Manager for Oracle Database - Version 13.3.0.0.0 and later
Information in this document applies to any platform.

Symptoms

From EM Console, ASM cluster and instances targets are shown as DOWN incorrectly though they are actually up.

Test Connection on Monitoring Configuration page gives the following error:

Error detail: Failed to connect to the ASM: Listener refused the connection with the following error: ORA-12514, TNS:listener does not currently know of service requested in connect descriptor

Changes

Servers where ASM instances are running are rebooted.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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