The reason why the tomcat window disappears after flashing

The reason why the Tomcat window flashes and disappears: Wrong port configuration: The port is occupied. Missing or corrupt JAR files: catalina.jar and catalina-ant.jar are missing or corrupt. Incompatible Java version: A Tomcat-compatible version is required. Firewall or security software blocks: Allow Tomcat port communication. Insufficient memory: Increase server memory capacity. Corrupted configuration file: syntax error or missing elements. Application conflicts: Close or uninstall other applications. Hardware problems: Run hardware diagnostic tests.

The reason why the Tomcat window flashes by and disappears

When the Tomcat server window flashes by and disappears, Usually caused by the following reasons:

1. Wrong port configuration

• Make sure that the port used by Tomcat is not occupied by other applications.
• Check the port settings in the server.xml configuration file. The port number should be 8080 and above.

2. Missing or damaged JAR file

• Check whether it exists in the WEB-INF/lib directorycatalina.jar and catalina-ant.jar files.
• If the file is missing or damaged, please re-download it from the Tomcat Apache website and replace it.

3. Wrong Java version

• Make sure you have installed a Java version that is compatible with Tomcat.
• Tomcat 9 requires Java 8 or higher, and Tomcat 8 requires Java 7.

4. Firewall or security software blocks

• Check whether the firewall or security software settings block Tomcat.
• Create rules in the firewall to allow Tomcat port communication.

5. Insufficient memory

• Tomcat needs enough memory to run properly.
• Check the server's available memory and increase the memory capacity if necessary.

6. Corrupted Tomcat configuration files

• server.xml and web.xml Errors or corruption in the configuration file can cause Tomcat to crash.
• Check these files for syntax errors or missing elements.

7. Other application conflicts

• Other running applications may conflict with Tomcat.
• Try closing or uninstalling other applications to see if that resolves the issue.

8. Hardware Problems

• In rare cases, hardware problems (such as corrupted memory or CPU overheating) may also cause Tomcat to crash. .
• Run hardware diagnostic tests to identify any potential issues.

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