EM 12c : Stoping One Node of the Enterprise Manager 12c Cloud Control Repository Cluster Database, the OMS Datasources Fail to Connect with the Scan Listener: oracle.mds.exception.MDSExceptionList: MDS-01329: unable to load element "persistence-config" (Doc ID 2147165.1)

Last updated on JUNE 13, 2016

Applies to:

Enterprise Manager Base Platform - Version 12.1.0.5.0 and later
Information in this document applies to any platform.

Symptoms

On Enterprise Manager Cloud Control 12.1.0.5.0 version, Cannot start OMS

ERROR
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Caused by: oracle.mds.exception.MDSExceptionList: MDS-01329: unable to load element "persistence-config"
MDS-01370: MetadataStore configuration for metadata-store-usage "writeable" is invalid.
MDS-01376: Unable to get database connection from data source "mds-sysman_mds" configured with JNDI name "jdbc/mds/sysman_mds".
weblogic.common.resourcepool.ResourceDeadException: 0:weblogic.common.ResourceException: Could not create pool connection. The DBMS driver exception was: Listener refused the connection with the following error:
ORA-12516, TNS:listener could not find available handler with matching protocol stack

Cannot obtain connection: driverURL = jdbc:weblogic:pool:mds-sysman_mds, props = {EmulateTwoPhaseCommit=false, connectionPoolID=mds-sysman_mds, jdbcTxDataSource=true, LoggingLastResource=false, dataSourceName=mds-sysman_mds}

ERROR
-----------------------
ORA-12516


Cause

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