使用 JAVA_OPTS 环境变量运行 java 没有效果
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Running java with JAVA_OPTS env variable has no effect
提问by Ashika Umanga Umagiliya
In a shell script, I have set the JAVA_OPTS environment variable (to enable remote debugging and increase memory), and then I execute the jar file as follows:
在shell脚本中，我已经设置了JAVA_OPTS环境变量（启用远程调试和增加内存），然后我执行jar文件如下：
export JAVA_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,address=8001,server=y,suspend=n -Xms512m -Xmx512m"
java -jar analyse.jar $*
But it seems there is no effect of the JAVA_OPTS env variable as I cannot connect to remote-debugging and I see no change in memory for the JVM.
但似乎 JAVA_OPTS 环境变量没有影响，因为我无法连接到远程调试，而且我看到 JVM 的内存没有变化。
What could be the problem?
可能是什么问题呢？
PS: I cannot use those settings in the java -jar analyse.jar $*command because I process command line arguments in the application.
PS：我无法在java -jar analyse.jar $*命令中使用这些设置，因为我在应用程序中处理命令行参数。
采纳答案by ZoogieZork
I don't know of any JVM that actually checks the JAVA_OPTSenvironment variable. Usually this is used in scripts which launch the JVM and they usually just add it to the javacommand-line.
我不知道任何实际检查JAVA_OPTS环境变量的JVM 。通常这用于启动 JVM 的脚本中，它们通常只是将它添加到java命令行中。
The key thing to understand here is that arguments to javathat come beforethe -jar analyse.jarbit will only affect the JVM and won'tbe passed along to your program. So, modifying the javaline in your script to:
要了解这里的关键问题是，参数java是来之前的-jar analyse.jar位只会影响JVM并不会沿着你的程序通过。因此，java将脚本中的行修改为：
java $JAVA_OPTS -jar analyse.jar $*
Should "just work".
应该“正常工作”。
回答by HEX
You can setup _JAVA_OPTIONSinstead of JAVA_OPTS. This should work without $_JAVA_OPTIONS.
您可以设置_JAVA_OPTIONS而不是JAVA_OPTS. 这应该可以在没有$_JAVA_OPTIONS.
