Apache Tomcat 9.x与Eclipse及Java 10.0.1启动兼容问题求助

Hey there, let’s work through this Tomcat-Eclipse startup problem together. I’ve run into similar hiccups with older Eclipse versions paired with newer JDK/Tomcat releases, so here are actionable steps to get your server running smoothly in Eclipse:

1. Verify Tomcat Server's JRE Configuration in Eclipse #

• Open Eclipse and navigate to Window > Show View > Servers (if you don’t see it, enable it via Window > Show View > Other > Server > Servers).
• Right-click your Tomcat 9.0 instance and select Open.
• Under the Server Locations section, make sure you’ve selected Use Tomcat installation (this ensures Eclipse uses your pre-installed Tomcat rather than a workspace copy, avoiding configuration mismatches).
• Scroll down to the JRE section and confirm you’ve selected your JDK 10.0.1 (not just the JRE—Tomcat relies on JDK tools like tools.jar which aren’t present in a standalone JRE).
• Save the configuration, restart Eclipse, and try starting the server again.

2. Fix Folder Permissions for Tomcat Installation #

Windows 8 restricts write access to folders like C:\Program Files, which might be where your Tomcat is installed. This can prevent Eclipse from writing to logs or configuration files:

• Right-click your Tomcat installation folder (e.g., C:\apache-tomcat-9.0.7) and select Properties > Security > Edit.
• Select your current user account and check the Full Control box under Permissions for [Your User].
• Click Apply then OK, then restart Eclipse and attempt to start Tomcat.

3. Update Eclipse.ini for JDK 10 Compatibility #

Eclipse Oxygen.3a doesn’t have out-of-the-box perfect support for JDK 10, so we need to tweak the eclipse.ini file:

• Locate the eclipse.ini file in your Eclipse installation directory.
• Open it in a text editor, and add these lines above the -vmargs section:

  -vm
  C:\Program Files\Java\jdk-10.0.1\bin\javaw.exe
  

• Also, find the line -Dosgi.requiredJavaVersion=1.8 and change it to -Dosgi.requiredJavaVersion=10 (this tells Eclipse to target JDK 10 explicitly).
• Save the file, restart Eclipse, and test the server startup.

4. Clean Tomcat Workspace and Eclipse Caches #

Corrupted cache files can often cause startup issues:

• In the Servers view, right-click your Tomcat instance and select Clean.
• Next, select Clean Tomcat Work Directory to clear any cached deployment files.
• Go to Eclipse’s Project > Clean menu, select Clean all projects, and click OK.
• Restart Eclipse and try starting the server once more.

5. Check Eclipse Console for Specific Error Details #

If none of the above work, the key is to look at the actual error message in Eclipse’s Console:

• Switch to the Servers tab in the Console view (use the dropdown if multiple consoles are open).
• Look for errors like port conflicts (use netstat -ano in CMD to find and kill the process using port 8080), missing dependencies, or configuration file issues.
• Address the specific error you find—this will lead you directly to the root cause.

内容的提问来源于stack exchange，提问作者Saurabh Bhoomkar