Cannot start enterprise manager - please help!

Question

Hello,
I installed 11.2.0.1 on RHEL 5.6.2 64 bit. Before the installation I changed SELinux to permissive mode.
After the installation, I set these variables in /home/oracle/.bash_profile:
export ORACLE_HOME=/opt/app/oracle/product/11.2.0/dbhome_1
export ORACLE_SID=testsid
export ORACLE_HOME_LISTNER=$ORACLE_HOME
export ORACLE_UNQNAME=testsid
PATH=$PATH:$ORACLE_HOME/binHere is the tnsnames.ora file, that has been generated during install:
TESTSID =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.170.76)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = testsid.mydomain.com)
  )I started the listener:
$ lsnrctl status
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.170.76)(PORT=1521)))
Services Summary...
Service "testsid.mydomain.com" has 1 instance(s).
  Instance "testsid", status READY, has 1 handler(s) for this service...
Service "testsidXDB.mydomain.com" has 1 instance(s).
  Instance "testsid", status READY, has 1 handler(s) for this service...
The command completed successfullyAnd the database instance is running:
$ sqlplus sys/sys@testsid as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Tue Oct 11 16:55:52 2011
Copyright (c) 1982, 2009, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select status from v$instance;
STATUS
OPEN
SQL> select database_status from v$instance;
DATABASE_STATUS
ACTIVEAnd then, I just can't start the EM console!
$ emctl start dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation.  All rights reserved.
https://192.168.170.76:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 11g Database Control ............................................................................................. failed.
Logs are generated in directory /opt/app/oracle/product/11.2.0/dbhome_1/192.168.170.76_testsid/sysman/log What am I missing here? How is it possible to make a fresh install and not be able to start the EM?
I'll appreciate any help!

Answer 1

1. Ensure that the REPOSITORY_URL configured in the <AGENT_HOME>/sysman/config/emd.properties file has the correct hostname of the OMS machine.
Refer Note 737373.1: Communication: Agent to OMS Communication Fails if the Agent's REPOSITORY_URL Parameter has Incorrect Value
2. If the OMS is secured and locked (accepts uploads only in the https mode), then secure the Agent also.
Refer:
Note 428874.1: How to tell if the EM OMS is locked or unlocked?
Note 283091.1: How To Secure / Unsecure The Grid Control Components (Agent / OMS) In 10g
cd <AGENT_HOME>/bin
emctl secure agent
This will prompt you for the Agent Registration password, which is needed for secure operation to complete.
If the Agent Registration password is not known, it can be re-set using the steps in
Note.433828.1: How to secure an agent when the registration password is not known.