Enterprise Manager

How to Resolve ORA-28001: the password has expired

by Ed Chen
January 4, 2020January 9, 2023
10 Comments

ORA-28001 ORA-28001 means that your password has been expired according to your profile. Normally, you should change the password, but you can still work around… Read More »

How to Open Port 1521 on Windows Server

by Ed Chen
October 26, 2019December 10, 2022

After our Oracle database 12.2 has been created on Windows server, we should open port 1521 on firewall for incoming connections. For Linux, you can… Read More »

How to Resolve DBT-06103 The Port 5500 is Already in Use

by Ed Chen
July 26, 2019February 13, 2023
2 Comments

DBT-06103 Met an error: DBT-06103 in configuring enterprise manager express port 5500 during Oracle 19c database installation. In fact, DBT-06103 means that OUI cannot learn… Read More »

How Oracle Enable EM Express

by Ed Chen
February 18, 2018December 20, 2021

Enable EM Express After installing 12c database, you may want to enable dbconsole just like 10g and 11g, but in fact, there's no emctl command… Read More »

How to Resolve OC4J Configuration issue

by Ed Chen
February 3, 2018February 13, 2023

An error occurred when I tried to start up dbconsole of Oracle database 11g. oracle@solaris11vm:~$ emctl start dbconsole OC4J Configuration issue. /u01/app/oracle/product/11.2.0/dbhome_1/oc4j/j2ee/OC4J_DBConsole_localhost_ORCL not found. Looked… Read More »

How to Resolve Enterprise Manager is Not Able to Connect to the Database Instance

by Ed Chen
May 13, 2017January 17, 2021

We saw the problem in Enterprise Manager 11g which has not been used for a long time. Enterprise Manager is not able to connect to… Read More »

How to Resolve ORA-12519: TNS:no appropriate service handler found (DBD ERROR: OCIServerAttach)

by Ed Chen
March 25, 2014December 11, 2022

ORA-12519 in Enterprise Manager Found ORA-12519 when trying to connect to the database by using dbconsole