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How can we know what version of JRE is used by Tomcat ?

Ravi Kiran Va
Ranch Hand

Joined: Apr 18, 2009
Posts: 2234

Hi ,

I have set JAVA_HOME to jdk 1.5 under my Environment Variables .
How can i know that , what version of JRE is my TOMCAT is using ??

Please sugegst , thanks .


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Marco Ehrentreich
best scout
Bartender

Joined: Mar 07, 2007
Posts: 1278

Hi Ravi,

if you start Tomcat from the command line (with startup.sh or startup. bat inside the bin/ directory) it should print some information to the console. There you should see which JRE_HOME Tomcat currently uses.

Additionally it should show up in logs/catalina.out (after a Tomcat start) or you can see it in the command line string (at least on UNIX/Linux).

Another alternative would be a management application like Lambda probe which shows you lots of details about your Tomcat instance and web applications.

Marco
Tim Holloway
Saloon Keeper

Joined: Jun 25, 2001
Posts: 15641
    
  15

You should be able to dial in via jconsole as well.

If a webapp needs to know the Java version, it can query the System property.

However, up through and including Tomcat6 you won't be strictly speaking running under a JRE. You have to have a JDK.


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Ravi Kiran Va
Ranch Hand

Joined: Apr 18, 2009
Posts: 2234

Thank you very much , I found a new tool Lambda probe
leo donahue
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Joined: Apr 17, 2003
Posts: 327
Or you could simply execute the version.bat file from the bin folder using a command prompt.

Thanks, leo
 
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