ORACLE_HOSTNAME undefined

Jun 24 posted in Oracle (RSS), 314 views.

The issue can be reproduced at will with the following steps:
1. Change the hostname.
2. Check DBConsole status

ISSUE VERIFICATION
==================
Verified the issue referencing data collected records as noted below.
CAUSE DETERMINATION
===================
The issue is caused by the following setup: hostname changed.
CAUSE JUSTIFICATION
===================
This issue is described in Metalink Note 330130.1
PROPOSED SOLUTION (S)
====================
Recreate the DBConsole
PROPOSED SOLUTION JUSTIFICATION (S)
==================================
After the hostname changes the DBConsole must be recreated to update the repository tables.
SOLUTION / ACTION PLAN
======================
- To implement the solution, please execute the following steps::
Prepare the environment:
- Open a new terminal window.
- Go to the Oracle installation folder.
- Set the ORACLE_HOME variable according to that folder.
eg. export ORACLE_HOME = / opt/oracle/db1
Please follow the steps below.
1. Stop the dbconsole on the target node
$ ORACLE_HOME / bin / emctl stop dbconsole
2. Delete the repository and directory structure using EMCA:
- Go to $ ORACLE_HOME / bin
- At the command prompt, enter the following command:
$ PROMPT> emca-deconfig dbcontrol db-repos drop
- Follow the instructions on the screen
3) If this returns successfully please go to step 5, otherwise follow step 4.
4) If the EMCA returns in any error please remove the repository manually:
4.1) Logon SQLPLUS as user SYS and drop the sysman account and management objects:
A. drop user sysman cascade;
B. drop role MGMT_USER;
C. drop user MGMT_VIEW cascade;
D. drop public synonym MGMT_TARGET_BLACKOUTS;
E. drop public synonym SETEMVIEWUSERCONTEXT;
5) After repository deletion please recreate the repository and directory structure.
- Go to $ ORACLE_HOME / bin
- At the command prompt, enter the following command:
$ PROMPT> emca-config dbcontrol db-repos create
- Follow the instructions on the screen
6) In case the dbconsole startup fails please provide the files of folder
$ ORACLE_HOME / cfgtoollogs
and
$ ORACLE_HOME / _ / sysman / log
to metalink.

Then, for em, the interface came out, but at a wrong:
java.lang.Exception: Exception in sending Request:: null
[oracle @ oracle config] $ pwd
/ op/oracle/product/10.2.4/oracle_orcl/sysman/config
[oracle @ oracle config] $ vi emd.properties
The value was revised to: agentTZRegion = Asia / Chongqing
Time zone on the list of reference: 10.2.0 \ db_1 \ sysman \ admin \ supportedtzs.lst
Then, restart OracleDBConsole <SID>