EM 12c: Enterprise Manager Cloud Control Installation Fails with Error: weblogic.nodemanager.NMConnectException: Connection refused. Could not connect to NodeManager. Check that it is running

(Doc ID 2135328.1)

Last updated on OCTOBER 28, 2017

Applies to:

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


Installing the Enterprise Manager (EM) 12c or 13c Cloud Control OMS on a host fails during the OMSCA with the error:

Failed at 62% during the installation, seeing error FINE: weblogic.nodemanager.NMConnectException: Connection refused. Could not connect to NodeManager. Check that it is running at host.domain.0rg:7403

INFO: oracle.sysman.top.oms:OMSCA-ERR:Infrastructure setup of EM failed. Check the trace file:/u01/app/oracle/oms12cr5/oms/cfgtoollogs/omsca/omsca_20160209151334.log
INFO: oracle.sysman.top.oms:
Check the OMS Configuration Assistant logs at: /u01/app/oracle/oms12cr5/oms/cfgtoollogs/omsca


From the .../Middleware/oms/cfgtoollogs/omsca/omsca_<timestamp>.log file:

NMProcess: WARNING: Exception while starting server 'EMGC_ADMINSERVER'
NMProcess: java.io.IOException: Server failed to start up. See server output log for more details.
NMProcess: at weblogic.nodemanager.server.AbstractServerManager.start(AbstractServerManager.java:196)
NMProcess: at weblogic.nodemanager.server.ServerManager.start(ServerManager.java:23)
NMProcess: at weblogic.nodemanager.server.Handler.handleStart(Handler.java:609)
NMProcess: at weblogic.nodemanager.server.Handler.handleCommand(Handler.java:119)
NMProcess: at weblogic.nodemanager.server.Handler.run(Handler.java:71)
NMProcess: at java.lang.Thread.run(Thread.java:662)


The adminserver fails to start. Checking the .../gc_inst/user_projects/domains/GCDomain/servers/EMGC_ADMINSERVER/logs/EMGC_ADMINSERVER.out:

<Feb 9, 2016 4:45:24 PM EST> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to STARTING>
<Feb 9, 2016 4:45:24 PM EST> <Info> <WorkManager> <BEA-002900> <Initializing self-tuning thread pool>
<Feb 9, 2016 4:45:25 PM EST> <Critical> <WebLogicServer> <BEA-000386> <Server subsystem failed. Reason: java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:394)
at java.util.Properties.setProperty(Properties.java:143)
at weblogic.ldap.EmbeddedLDAP.initServerConfig(EmbeddedLDAP.java:1145)
at weblogic.ldap.EmbeddedLDAP.start(EmbeddedLDAP.java:261)
at weblogic.t3.srvr.SubsystemRequest.run(SubsystemRequest.java:64)
Truncated. see log file for complete stacktrace -






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