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The error you're experiencing indicates that the Tomcat server failed to start due to a child container failure. This is often related to configuration issues or problems with the application being deployed. Here are some steps you can take to troubleshoot and potentially resolve the issue:
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Check your application's configuration files, especially those related to database connections (like application.properties or application-main.yml). Ensure all connection details such as host, port, database name, username, and password are correct.
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Verify that all required resources, such as databases or other services your application depends on, are available and accessible from the server where Tomcat is running.
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Review the Tomcat configuration files (server.xml, context.xml) to ensure they are correctly set up, especially if you've made any recent changes.
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Look for more detailed error messages in the Tomcat logs (catalina.out or similar). The snippet you provided doesn't show the root cause, so there might be more informative error messages earlier in the log.
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Ensure that all required libraries and dependencies are present in the correct locations and that there are no conflicts between different versions of libraries.
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Check if there are any port conflicts. Make sure the ports Tomcat needs (like 8080 for HTTP, 8005 for shutdown) are not being used by other processes.
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Verify that the user running Tomcat has the necessary permissions to access all required resources and directories.
If the problem persists after checking these items, you may need to enable more detailed logging in both Tomcat and your application to get more information about the exact nature of the failure. This will help in pinpointing the root cause of the issue.
Sources
tomcat server is not starting | AWS re:Post
Go Live Start carddemo application failed - AWS Mainframe modernization application | AWS re:Post
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