Troubleshoot OEM or OMS FAQs in startup oracle9i

Recently, browsing BBS, often see "urgent!" how to start OMS? " Words, I have some experience to share with you on the above problems.

The following two points are key to whether the OEM or OMS can be started properly:

First. Whether Oracle's system services are open;

Second, the user name and password used when logging on are correct.

Let's talk about Oracle's system services for the 1th. In the case of a full installation, Oracle has a total of 11 system services:

1.Oracle OLAP 9.0.1.0.1

2.Oracle OLAP Agent

3.oracleorahome90agent

4.oracleorahome90clientcache

5.oracleorahome90httpserver

6.oracleorahome90managementserver (0.5M)

7.oracleorahome90pagingserver

8.oracleorahome90snmppeerencapsulator

9.oracleorahome90snmppeermasteragent

10.oracleorahome90tnslistener (5.2M)

11.OracleServiceORACLE (70M)

(Note: OraHome90 is the name of the Oracle's home directory that can be changed at installation time, which is the default value at installation time)

The most important services are 3, namely Oracleorahome90managementserver, Oracleorahome90tnslistener and Oracleserviceoracle. Here's a look at some of the startup errors that are relevant to them.

1.Oracle system hint: ora-12541:tns: no listener;

2. Operating system tip: The OMS service cannot be started on the local computer

Error: 1053: The service did not respond in time to control the request incidental;

The above two kinds of error tips are mostly caused by Oracleorahome90tnslistener listening service.

Workaround: Control Panel-> management Tools-> Service-> Right-click Oracleorahome90tnslistener, and then click Start.

3.Oracle system Hint: ora-12500:tns: The listener cannot start the dedicated server process;

This error is caused by the oracleserviceoracle dedicated server process.

Workaround: Control Panel-> management Tools-> Service-> Right-click Oracleserviceoracle, and then click Start.

4.Oracle system Hint: VTK-1000: Unable to connect to management Server.

Please verify that you have entered the correct hostname and status of Oracle Management server.

There are two reasons for this error, one is that Oracleorahome90managementserver has not been started, and the other is that no host name has been entered.

Workaround: Control Panel-> management Tools-> Service-> Right-click Oracleorahome90managementserver, click Start, or enter the full name of your computer.

Then, for the 2nd, talk about the username and password used to log in.

At the end of the installation, the system provides two default database system administrators whose username and password are sys/change_on_install and System/manager, and the system also provides a login OMS username and password: sysman/oem_temp. The error is that the login OMS is logged with the SYS or system as the user name, and the Oracle system has the "Incorrect logon credentials" prompt.

Summary: There are sequential orders for starting or closing these three services. Generally speaking, you must start Oracleorahome90tnslistener before starting Oracleorahome90managementserver or oracleserviceoracle, When the Oracleorahome90managementserver is started, the oracleserviceoracle is also started. You must close the oracleorahome90managementserver before shutting down Oracleorahome90tnslistener or oracleserviceoracle. If you are prompted to enter a username and password when you close Oracleorahome90managementserver, enter your Sysman username and password to ensure successful execution. Some other hints such as: resources have been occupied, I/O duplication, ports have been used, and so on, it is best to contact the system administrator, and then find a solution.