What should I do if Oracle em cannot be opened?
As an Oracle database administrator, you may encounter some common problems, such as Oracle EM cannot be opened. If you are encountering such a problem, this article will provide some possible solutions to the problem.
First, we need to determine if Oracle EM is actually installed and running. This can be determined by checking the status of the WebLogic Server used by Oracle EM. If WebLogic Server does not start, Oracle EM will not start either. Please do the following to check the status of WebLogic Server:
- Open the Command Prompt or Terminal application.
- Navigate to the WebLogic Server installation directory. By default this will be located at "%ORACLE_HOME%\user_projects\domains\base_domain".
- Run the following command:
Windows: startWebLogic.cmd
Linux/Unix: startWebLogic.sh
If WebLogic Server has already started, please Try restarting Oracle EM and check if it still fails to open. If it still cannot be opened, please consider the following solutions:
- Check the configuration file of EM
The configuration file of Oracle EM is located in the following directory:
Windows: %ORACLE_HOME%\user_projects\domains\base_domain\config\fmwconfig\servers\EMGC_OMS1
Linux/Unix: $ORACLE_HOME/user_projects/domains/base_domain/config/fmwconfig/servers/EMGC_OMS1
You can try to delete all cache and temporary files, and then restart Oracle EM.
- Check Firewall Settings
If you have a firewall on your server, you may need to open certain firewall ports to allow Oracle EM to function properly. The following ports need to be opened:
Port: 7001
Protocol: TCP
Port: 4889
Protocol: TCP
Port: 1157
Protocol: TCP
Port: 1521
Protocol: TCP
Port: 3872
Protocol: TCP
If the port is already open, please check if the configuration is correct or if it is possible Blocked by other rules.
- Check the Java version of EM
Oracle EM must use Java SE Development Kit 8 (JDK 8) to work properly. If your system has a different version of Java installed, Oracle EM may not start. Please make sure you have JDK 8 installed on your system and configured as the default Java version.
The above are some reasons and solutions that may cause Oracle EM to fail to open. Hopefully, this information will help you resolve issues like this as quickly as possible.
The above is the detailed content of What should I do if Oracle em cannot be opened?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
What are the oracle database operation tools?
Apr 11, 2025 pm 03:09 PM
In addition to SQL*Plus, there are tools for operating Oracle databases: SQL Developer: free tools, interface friendly, and support graphical operations and debugging. Toad: Business tools, feature-rich, excellent in database management and tuning. PL/SQL Developer: Powerful tools for PL/SQL development, code editing and debugging. Dbeaver: Free open source tool, supports multiple databases, and has a simple interface.
How to check tablespace size of oracle
Apr 11, 2025 pm 08:15 PM
To query the Oracle tablespace size, follow the following steps: Determine the tablespace name by running the query: SELECT tablespace_name FROM dba_tablespaces; Query the tablespace size by running the query: SELECT sum(bytes) AS total_size, sum(bytes_free) AS available_space, sum(bytes) - sum(bytes_free) AS used_space FROM dba_data_files WHERE tablespace_
How to learn oracle database
Apr 11, 2025 pm 02:54 PM
There are no shortcuts to learning Oracle databases. You need to understand database concepts, master SQL skills, and continuously improve through practice. First of all, we need to understand the storage and management mechanism of the database, master the basic concepts such as tables, rows, and columns, and constraints such as primary keys and foreign keys. Then, through practice, install the Oracle database, start practicing with simple SELECT statements, and gradually master various SQL statements and syntax. After that, you can learn advanced features such as PL/SQL, optimize SQL statements, and design an efficient database architecture to improve database efficiency and security.
What to do if the oracle can't be opened
Apr 11, 2025 pm 10:06 PM
Solutions to Oracle cannot be opened include: 1. Start the database service; 2. Start the listener; 3. Check port conflicts; 4. Set environment variables correctly; 5. Make sure the firewall or antivirus software does not block the connection; 6. Check whether the server is closed; 7. Use RMAN to recover corrupt files; 8. Check whether the TNS service name is correct; 9. Check network connection; 10. Reinstall Oracle software.
Oracle PL/SQL Deep Dive: Mastering Procedures, Functions & Packages
Apr 03, 2025 am 12:03 AM
The procedures, functions and packages in OraclePL/SQL are used to perform operations, return values and organize code, respectively. 1. The process is used to perform operations such as outputting greetings. 2. The function is used to calculate and return a value, such as calculating the sum of two numbers. 3. Packages are used to organize relevant elements and improve the modularity and maintainability of the code, such as packages that manage inventory.
How to view the oracle database How to view the oracle database
Apr 11, 2025 pm 02:48 PM
To view Oracle databases, you can use SQL*Plus (using SELECT commands), SQL Developer (graphy interface), or system view (displaying internal information of the database). The basic steps include connecting to the database, filtering data using SELECT statements, and optimizing queries for performance. Additionally, the system view provides detailed information on the database, which helps monitor and troubleshoot. Through practice and continuous learning, you can deeply explore the mystery of Oracle database.
How to create oracle database How to create oracle database
Apr 11, 2025 pm 02:36 PM
To create an Oracle database, the common method is to use the dbca graphical tool. The steps are as follows: 1. Use the dbca tool to set the dbName to specify the database name; 2. Set sysPassword and systemPassword to strong passwords; 3. Set characterSet and nationalCharacterSet to AL32UTF8; 4. Set memorySize and tablespaceSize to adjust according to actual needs; 5. Specify the logFile path. Advanced methods are created manually using SQL commands, but are more complex and prone to errors. Pay attention to password strength, character set selection, tablespace size and memory
How to solve the problem of closing oracle cursor
Apr 11, 2025 pm 10:18 PM
The method to solve the Oracle cursor closure problem includes: explicitly closing the cursor using the CLOSE statement. Declare the cursor in the FOR UPDATE clause so that it automatically closes after the scope is ended. Declare the cursor in the USING clause so that it automatically closes when the associated PL/SQL variable is closed. Use exception handling to ensure that the cursor is closed in any exception situation. Use the connection pool to automatically close the cursor. Disable automatic submission and delay cursor closing.
