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EM 13c: Cluster database target discovered as single database instance targets during discovery. (Doc ID 2638917.1)

Last updated on AUGUST 19, 2022

Applies to:

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


Attempting to discover cluster database target and discovered as single database instance targets.


emagent_perl.trc file shows below error

srvctl config database -d <DB> -S 1: "<DB_HOME>/bin/srvctl config database -d <DB> -S 1" returned: "Exception in thread "main" java.lang.NoClassDefFoundError: oracle/net/nl/InvalidSyntaxException
at oracle.cluster.impl.database.DatabaseImpl.getDBInstances(
at oracle.cluster.impl.database.DatabaseImpl.configuredInstances(
at oracle.cluster.impl.database.DatabaseImpl.getAdminDBConfiguredNodes(
at oracle.ops.opsctl.ConfigAction.internalExecuteDatabase(
at oracle.ops.opsctl.ConfigAction.executeDatabase(
at oracle.ops.opsctl.Action.execute(
at oracle.ops.opsctl.OPSCTLDriver.execute(
at oracle.ops.opsctl.OPSCTLDriver.main(
Caused by: java.lang.ClassNotFoundException:
at Method)
at java.lang.ClassLoader.loadClass(
at sun.misc.Launcher$AppClassLoader.loadClass(
at java.lang.ClassLoader.loadClass(



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