WebLogic Server LifeCycle Error: "Service started at level 9 but has a run level of 10" - A Comprehensive Guide
This article explains the "Service weblogic.server.ServerLifeCycle Service was started at level 9 but it has a run level of 10" error encountered in WebLogic Server. We'll break down the problem, analyze its root cause, and provide solutions to resolve it effectively.
Understanding the Problem
The error message "Service weblogic.server.ServerLifeCycle Service was started at level 9 but it has a run level of 10" indicates that the WebLogic Server's ServerLifeCycle service has been started with a lower run level (9) than its configured run level (10). This mismatch creates a conflict, preventing the server from functioning correctly.
Scenario and Code
Let's illustrate this with a common scenario:
- Your WebLogic Server Configuration: You have configured the ServerLifeCycle service to start at run level 10.
- Your System's Startup Process: Your system is configured to initiate the WebLogic Server service at run level 9.
Here's how this code snippet could look:
<service-name>weblogic.server.ServerLifeCycle</service-name>
<start-type>manual</start-type>
<run-level>10</run-level>
This mismatch in run levels is where the problem originates.
Analysis and Clarification
The run level of a service defines the order in which it starts during the system's boot process. A higher run level indicates a later start time.
In this case, the ServerLifeCycle service is attempting to start at run level 9, but it's configured to run at level 10. Since the system hasn't reached the required run level (10) yet, the service fails to start properly, causing the error.
Solutions
1. Modify the WebLogic Server Configuration:
-
Change the
run-levelin the WebLogic Server's configuration: Modify therun-levelof the ServerLifeCycle service to match the system's startup level (9) in your WebLogic Server'sconfig.xmlfile. -
Example:
<service-name>weblogic.server.ServerLifeCycle</service-name>
<start-type>manual</start-type>
<run-level>9</run-level>
2. Modify the System's Startup Process:
- Adjust the system's run level: Modify your system's startup process to start the WebLogic Server service at run level 10. This might involve modifying the init script or service configuration.
3. Check for Conflicts:
- Potential Conflicts: Review your WebLogic Server configuration and system services for potential conflicts that might be causing the mismatch in run levels. For example, another service might be blocking the ServerLifeCycle service from starting at its intended run level.
4. Restart the Service:
- Restart the WebLogic Server: Once you've made the necessary adjustments, restart the WebLogic Server service to ensure that the changes take effect.
Additional Value
- Understanding Run Levels: Run levels are essential for managing the order of service startup in a system. Understanding their significance can help you troubleshoot and resolve issues related to service dependencies.
- Consult Documentation: Always refer to the official documentation for your WebLogic Server version and operating system for detailed instructions on configuring service run levels.
References:
- WebLogic Server Documentation: https://docs.oracle.com/middleware/12213/wls/WLSSG/runlevel.htm
- Oracle Support Website: https://support.oracle.com/
By carefully reviewing your configuration and understanding the role of run levels, you can effectively resolve the "Service weblogic.server.ServerLifeCycle Service was started at level 9 but it has a run level of 10" error and ensure your WebLogic Server starts successfully.
