How to change java_opts for tomcat when we run it as a windows service manually?

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名媛妹妹
名媛妹妹 2021-02-05 09:35

I\'m manually running tomcat 6 as a windows service on the console. I need to change java_opts before starting it. How do I do that? Also, Is there a way I can see the logs dyna

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  • 2021-02-05 09:43

    You can set your JAVA_OPTS environment variable either manually via the command line prior to starting Tomcat:

    set JAVA_OPTS=youropts
    

    or you can edit catalina.bat with the values you want.

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  • 2021-02-05 09:54

    In windows, cut the quotes on the set command. Quotes are taken literally.

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  • 2021-02-05 09:55

    To change the settings, create a file named setenv.bat for windows or setenv.sh for Linux with entry as below:

    Windows:

    set JAVA_OPTS="-Xms256m -Xmx512m"
    

    Linux:

    export JAVA_OPTS="-Xms256m -Xmx512m"
    

    Simply put this(setenv.bat/setenv.sh) file in %CATALINA_HOME%\bin\ folder. Your command file (catalina.bat/catalina.sh) already has a statement as below:

    Windows:

    if exist "%CATALINA_HOME%\bin\setenv.bat" call "%CATALINA_HOME%\bin\setenv.bat"
    

    Linux:

    if [ -r "$CATALINA_BASE/bin/setenv.sh" ]; then
     . "$CATALINA_BASE/bin/setenv.sh"
    

    elif [ -r "$CATALINA_HOME/bin/setenv.sh" ]; then . "$CATALINA_HOME/bin/setenv.sh" fi This will take care the rest.

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  • 2021-02-05 10:02

    I know this is an old thread but needed to correct some assumptions.

    Just an FYI, Catalina.bat is not utilized when running tomcat as a service. here is the method to change the JAVA_OPTS for tomcat running as a windows service.

    1. Open Services and click on the Tomcat service. Make a note of the service name (most likely Tomcat6).
    2. cd to the Tomcat bin directory
    3. Run the command

      tomcat6w //ES//Tomcat6 (substitute your service name if different)

    4. Click on the Java tab

    5. Add the options (each on a new line) to the Java Options box and set the initial and max memory to 1536 and 2048

      -XX:MaxPermSize=256m -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true

    6. Click apply

    7. Click on the general tab and restart the service
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  • 2021-02-05 10:06

    To alter the $JAVA_OPTS, you will probably need to edit the batch file you use to start Tomcat. I don't run Tomcat on Windows, but the $JAVA_OPTS appears in my catalina.sh inside the bin/ directory on my Linux installation.

    As far as viewing logs dynamically on Windows, there are a couple of options I'm aware of.

    1. Download and install Cygwin, and then on the command-line, use tail -f logfilename like you would in Linux.
    2. Get the BearTail program and use that to follow your log files.
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