How to add jvm options to tomcat on windows 7

Question

How can I add jvm options to Tomcat on Windows 7?. By the way I am using Tomcat 7. I added my jvm options to first line of catalina.bat file but it didn't work. I think I am doing something wrong. Is there any idea?

As MariuszS said, you should add the file yourself and add the JVM options in there. Catalina.bat will check if this file exists and execute it. — Pieter, Dec 18 '13 at 12:33
@Pieter I created a file named setenv.bat in bin directory and added set JAVA_OPTS=-Dproject.home=C:\Users\myproject but didn't worked. — hellzone, Dec 18 '13 at 12:41
Do you get a specific error? Or could you describe in more detail what is not working? — Pieter, Dec 18 '13 at 13:01
@hellzone How are you starting your server? Can you post the complete command? — Pieter, Dec 18 '13 at 14:31
Running as a service? http://stackoverflow.com/questions/6225682/passing-jvm-arguments-to-tomcat-when-running-as-a-service/6225719#6225719 — Michael, Dec 18 '13 at 14:57

score 4 · Answer 1 · answered Dec 19 '13 at 16:20

Create the file bin/setenv.bat. If you are using bin/startup.bat or bin/catalina.bat to start Tomcat, then the setenv script will be run before performing most other operations. You can set whatever JVM options you want by setting the CATALINA_OPTS environment variable.

If you are using Tomcat's service launcher from Microsoft Windows' services panel to launch Tomcat then you cannot use this technique. Instead, you'll need to run tomcat7.exe with the appropriate options you can find here.

Note that you can also set JAVA_OPTS but JAVA_OPTS will be used for all JVM processes, including the one launched to request a shutdown of Tomcat. For example, if you want to enable RMI services for Tomcat and you set them in JAVA_HOME, then Tomcat will start up properly but when attempting to shutdown, the shutdown process may fail due to port conflicts. Similarly, if you need a 20GiB heap for Tomcat and you set -Xms and -Xmx in JAVA_OPTS, you'll end up creating a 20GiB heap for the process that stops Tomcat. So, use CATALINA_OPTS unless you have a very good reason to use JAVA_OPTS.

Keerthivasan · Answer 2 · 2013-12-19T16:26:51.167

2

Here you have my two cents,

Use CATALINA_OPTS or JAVA_OPTS. You can set the jvm options in either one of these variables in catalina.bat file according to your requirement. Read the comments in catalina.bat file about these variables. You will understand

EDIT after your comment

Set the environment variable - project.home in windows environment using this link. Now, your env variable is set
Set the JAVA_OPTS in setenv.bat (you need to create this file)

set JAVA_OPTS="-Dproject.home"

or

  set JAVA_OPTS="%JAVA_OPTS% -Dproject.home"

for safety purpose. This will prepend the existing JAVA_OPTS with the new value.Start the server. Always, use UPPERCASE LETTERS, NUMBERS AND UNDERSCORE for environment variables. This is for portability reasons.

edited Dec 19 '13 at 16:26

answered Dec 18 '13 at 12:38

Keerthivasan

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I read all comments in catalina.bat but I didn't understand anything. – hellzone Dec 18 '13 at 12:39
can you post the options you want to add? – Keerthivasan Dec 18 '13 at 12:41
-Dproject.home=C:\Users\myproject – hellzone Dec 18 '13 at 12:42
the output of echo %project.home% is "%project.home%" – hellzone Dec 18 '13 at 14:52
then, environment variable is not set properly. set it correctly – Keerthivasan Dec 18 '13 at 14:53
echo %java_home% works good it points jdk location but when i set variable name=a and value=b then I write echo %a% and It writes "%a%". I don't understand. – hellzone Dec 18 '13 at 14:55
can you execute set > env.txt in command prompt to list all environment variables. This command will write all the environment variables to env.txt in the same directory – Keerthivasan Dec 18 '13 at 14:58
in env.txt file I can see "Dproject.home=C:\Users\myproject" – hellzone Dec 18 '13 at 15:04
1

Change the environment variable 'Dproject.home' to 'project.home'. Remove the 'D' in the env variable name. but, don't forget that you should put -D while setting in the JAVA_OPTS to denote it is a user defined system variable – Keerthivasan Dec 18 '13 at 16:09
You should not modify `catalina.bat` (or `catalina.sh`). Instead, create a `bin/setenv.bat` (or `bin/setenv.sh`) file and set whatever options you need there. – Christopher Schultz Dec 19 '13 at 16:14
@ChristopherSchultz I have mentioned in the second point - Set the JAVA_OPTS in setenv.bat (you need to create this file) or catalina.bat file. – Keerthivasan Dec 19 '13 at 16:26
@ChristopherSchultz removed catalina.bat file from answer – Keerthivasan Dec 19 '13 at 16:27

score 1 · Answer 3 · answered Dec 18 '13 at 19:57

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I prefer using context.xml for tomcat environment variables:

File conf\context.xml should looks like this:

<?xml version='1.0' encoding='utf-8'?>
<Context>

     ...

     <Environment name="project.home" value="C:\Users\myproject" type="java.lang.String"/>

</Context>

After this environment variable project.home is simply accessible inside your tomcat app.

answered Dec 18 '13 at 19:57

MariuszS

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This won't work, because JVM options can't be set after the JVM launches. – Christopher Schultz Dec 19 '13 at 16:13
`project.home` looks like option for web application inside tomcat for me, but you are right, this is not working for JVM. – MariuszS Dec 19 '13 at 17:59

How to add jvm options to tomcat on windows 7

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