Tomcat 4.1 Service, and the JVM it uses

[Mike Curwen]

Have you ever wanted to switch the JVM that Tomcat 4.1.x uses when starting as a service?

It's easy enough when you start Tomcat from the batch scripts, they use JAVA_HOME.

But the JVM is chosen at installation time for the Tomcat service.

So to change it use regedit.
1. STOP the tomcat service!
2. Using regedit, go to HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Apache Tomcat 4.1\Parameters\
3. Change the value of the JVM Library value
examples:
c:\jdk141_02\jre\bin\server\jvm.dll
C:\Program Files\JavaSoft\JRE\1.3.1_07\bin\hotspot\jvm.dll

[Manish Hatwalne]

Thanks Mike,
That was useful!
However, when I installed my Tomcat 4.0 earlier, the installation was as simple as extracting files from zip to a directory and changing few simple configuration. I loved the simplicity and transperancy that sort of installation gave me. Didn't know that now Tomcat also requires messing up the registry!
- Manish

[Mike Curwen]

Hi Manish,
It doesn't *require* messing with the registry. This is only if you want to change the JVM under which tomcat is invoked, *After* you have installed it.

For the batch scripts you use to start Tomcat (usually from the Start menu), it's as simple as changing your JAVA_HOME system variable.

But for the Tomcat service, you need to use the registry.

Again.. that's only if you want to *change* what JVM you're using.

[Rene Larsen]

You'll only get an entry in the registry if tomcat is installed as a Service.
Either by installing tomcat from the '.exe' version or after unzipping the '.zip' version installing the Service manully.
Rene
[ June 01, 2003: Message edited by: Rene Larsen ]