After conducting EM, the interface came out, but reported a mistake:
Java.lang.Exception:Exception in sending Request:: null
Many features are not available, prompting you to log in again.
A workaround was found at the Oracle forum:
http://forums.oracle.com/forums/thread.jspa?threadID=320574&tstart=0&messageID=1374397
Find the following file
D:/oracle/product/10.2.0/db_1/mingtian.mingtianesso.com_jyc/sysman/config/emd.properties
The default for Agenttzregion is GMT, which can be changed to your time zone, for example:
Agenttzregion=asia/chungking
Turn off the console first.
Type in cmd
emctl Resettz Agent
emctl Config agent Gettz
Restart the console
About the time zone list reference: 10.2.0/db_1/sysman/admin/supportedtzs.lst
Then restart Oracledbconsole.
Note: This issue is known through the Emctl Status View: Because installation Oracle , possibly the last Oracle SID was inconsistent with this instance name, resolved by the set Oracle SID