After Oracle 10g R2 is installed, the following errors are prompted when you log on to the Web console:
Io exception: Unknown host specified;
Java. Lang. Exception: exception in sending request: NULL;
"Agent process exited abnormally during initialization" in System Event Log;
Cause: this problem is caused by the time zone error automatically configured by the Database Control Service. Generally,/config/EMD is in the file. properties, no agenttzregion parameter or agenttzregion = GMT, you only need to change GMT to our current time zone and restart the oracledbconsole_sid service. If the firewall is installed, make sure that the corresponding service can access the network.
Solution:
Step 1: find $ ORACLE_HOME \ $ PC-name _ $ Oracle-SID \ sysman \ config \ EMD. Properties
$ PC-name = Host Name
$ Oracle-SID = Sid
Step 2: Open EMD. properties in notepad and search for agenttzregion. The default value is GMT. Change it to your time zone.
Agenttzregion = Asia/Shanghai
Select * from V $ timezone_names
Step 3: restart the oracledbconsole <Sid> Service
Reprinted from: http://blog.csdn.net/amber112/archive/2011/03/18/6258616.aspx
References:
Http://www.cnblogs.com/jerryjaord/archive/2010/07/14/1776939.html
Http://blog.sina.com.cn/s/blog_4b0210750100o8mc.html