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enterprise manager cannot be started under OEL

REDO LOGOct 19 2012 — edited Oct 19 2012

Hi all
I have installed oracle database 11gR2 on oracle enterprise linux 6.2, the database runs properly
but still have problems in the enterprise manager, and by issuing the startup command I got this error:

[oracle@localhost Desktop]$ emctl startup dbconsole
The following exception occurred: 
java.net.UnknownHostException: ol6-112.localdomain: ol6-112.localdomain
	at java.net.InetAddress.getAllByName0(InetAddress.java:1145)
	at java.net.InetAddress.getAllByName(InetAddress.java:1072)
	at java.net.InetAddress.getAllByName(InetAddress.java:1008)
	at java.net.InetAddress.getByName(InetAddress.java:958)
	at oracle.sysman.emd.targetIntg.agent.AgentTargetInstaller.getLocalHost(AgentTargetInstaller.java:4289)
	at oracle.sysman.emd.targetIntg.agent.AgentTargetInstaller.printLocalHost(AgentTargetInstaller.java:4252)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at oracle.sysman.emd.targetIntg.Util$DefaultIntegrationMethod.execute(Util.java:598)
	at oracle.sysman.emd.targetIntg.TargetInstaller.execute_(TargetInstaller.java:167)
	at oracle.sysman.emd.targetIntg.TargetInstaller.execute(TargetInstaller.java:155)
	at oracle.sysman.emSDK.conf.TargetInstaller.printLocalHost(TargetInstaller.java:2364)
	at oracle.sysman.emSDK.conf.TargetInstaller.main(TargetInstaller.java:3290)
Although there was an exception it might be possible for the program to continue.
EM Configuration issue. /u01/app/oracle/product/11.2.0/dbhome_1/OC4J_DBConsole_localhost_DB11G not found.

I have created the OC4J_DBConsole_localhost_DB11G directory and copy the contents of the OC4J_DBConsole_ol6-112.localdomain_DB11G to it, because I though that the problem was in the machine name, then I issued the same command and get the following error:

[oracle@localhost Desktop]$ emctl startup dbconsole
The following exception occurred: 
java.net.UnknownHostException: ol6-112.localdomain: ol6-112.localdomain
	at java.net.InetAddress.getAllByName0(InetAddress.java:1145)
	at java.net.InetAddress.getAllByName(InetAddress.java:1072)
	at java.net.InetAddress.getAllByName(InetAddress.java:1008)
	at java.net.InetAddress.getByName(InetAddress.java:958)
	at oracle.sysman.emd.targetIntg.agent.AgentTargetInstaller.getLocalHost(AgentTargetInstaller.java:4289)
	at oracle.sysman.emd.targetIntg.agent.AgentTargetInstaller.printLocalHost(AgentTargetInstaller.java:4252)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at oracle.sysman.emd.targetIntg.Util$DefaultIntegrationMethod.execute(Util.java:598)
	at oracle.sysman.emd.targetIntg.TargetInstaller.execute_(TargetInstaller.java:167)
	at oracle.sysman.emd.targetIntg.TargetInstaller.execute(TargetInstaller.java:155)
	at oracle.sysman.emSDK.conf.TargetInstaller.printLocalHost(TargetInstaller.java:2364)
	at oracle.sysman.emSDK.conf.TargetInstaller.main(TargetInstaller.java:3290)
Although there was an exception it might be possible for the program to continue.
EM Configuration issue. /u01/app/oracle/product/11.2.0/dbhome_1/ol6-112.localdomain_DB11G not found.

if you notice, the last error line has changed from EM Configuration issue. /u01/app/oracle/product/11.2.0/dbhome_1/OC4J_DBConsole_localhost_DB11G not found.

to EM Configuration issue. /u01/app/oracle/product/11.2.0/dbhome_1/ol6-112.localdomain_DB11G not found

is there any thing that is missed during installation process?

thanks from help

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Locked on Nov 16 2012

Added on Oct 19 2012

#general-database-discussions

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