CATALINA_OPTS与JAVA_OPTS - 有什么区别？ [英] CATALINA_OPTS vs JAVA_OPTS - What is the difference?

问题描述

我试图在 CATALINA_OPTS 和 JAVA_OPTS 之间的区别http://stackoverflow.comtitle =StackOverflow>所以并惊讶地发现此处尚未发布任何问题/答案。在找到差异后，我想在这里分享（有答案）。检查下面的答案/差异。

I was trying to find out the difference between Apache Tomcat variables - CATALINA_OPTS and JAVA_OPTS in SO and surprised to see that there is no question/answer posted here yet. So I thought of sharing it here (with answer) after finding out the difference. Check the answer/difference below.

注意：在发布这篇文章时，我们正在使用JDK 6u32运行Apache Tomcat v6.0.10在CentOS5 64位拱门上。

NOTE: At the time of this posting, we're running Apache Tomcat v6.0.10 with JDK 6u32 on CentOS5 64-bit arch.

推荐答案

有两个环境变量 - CATALINA_OPTS 和 JAVA_OPTS - 这些都在Tomcat的 catalina.sh 启动和关闭脚本中使用。它们在该文件中的注释中描述为：

There are two environment variables - CATALINA_OPTS and JAVA_OPTS - which are both used in the catalina.sh startup and shutdown script for Tomcat. They are described in comments within that file as:

[JAVA_OPTS] :(可选）start时使用的Java运行时选项，停止或运行
命令被执行

[JAVA_OPTS]: (optional) Java runtime options used when the "start", "stop" or "run" command is executed

和

[CATALINA_OPTS] :(可选）执行start或run命令时使用的Java运行时选项

[CATALINA_OPTS]: (optional) Java runtime options used when the "start" or "run" command is executed

那么为什么有两个不同的变量呢？有什么区别？

首先，在EITHER变量中指定的任何内容都会以相同的方式传递给启动Tomcat的命令 - start或运行命令 - 但只有在JAVA_OPTS中设置的值才会传递给stop命令。这可能对Tomcat在实践中的运行方式没有任何影响，因为它只影响运行的结束，而不是开始。

Firstly, anything specified in EITHER variable is passed, identically, to the command that starts up Tomcat - the "start" or "run" command - but only values set in JAVA_OPTS are passed to the "stop" command. That probably doesn't make any difference to how Tomcat runs in practise as it only effects the end of a run, not the start.

第二个区别更为微妙。其他应用程序也可以使用JAVA_OPTS，但只有Tomcat才会使用CATALINA_OPTS。因此，如果您设置环境变量仅供Tomcat使用，那么最好建议您使用CATALINA_OPTS，而如果您正在设置环境变量以供其他Java应用程序使用，例如JBoss，您应该放置您在JAVA_OPTS中的设置。

The second difference is more subtle. Other applications may also use JAVA_OPTS, but only Tomcat will use CATALINA_OPTS. So if you're setting environment variables for use only by Tomcat, you'll be best advised to use CATALINA_OPTS, whereas if you're setting environment variables to be used by other java applications as well, such as by JBoss, you should put your settings in JAVA_OPTS.

来源： CATALINA_OPTS v JAVA_OPTS - 有什么区别？

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