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From saj-khan <>
Subject RE: TOMCAT 64bit & 32BIT differences - URGENT
Date Fri, 08 Jul 2011 11:04:59 GMT

Hi Jeff,

Thank you for your reply! (thanks everyone else as well)

I know now that i need to replace the java from 32bit to 64bit to the same
location as 
the 32bit c:\java and ensure my java_home environment variable is

for tomcat I am simply going to unzip the 64bit installer and copy out the
lib folder and its contents
and also the tomcat.exe as you mentioned, this should take care of the

both of the tomcat installations are setup as windows services, but this
shouldnt matter
seeing as the .exe that the services call on to start up is named the same
as the 32bit.

can you confirm if this is correct?


for the apache tomcat, 

Jeffrey Janner wrote:
> Saj-khan:
> You will need a 64-bit Java implementation, and the 64-bit version of the
> tomcat.exe wrapper program in the bin directory. Last I checked, the
> tomcatw.exe program is still 32-bit, as it only has to manipulate the
> registry.
> If you are also using the APR protocol for your connectors, you will need
> the 64-bit version of the native libraries.
> The current tomcat installer will automatically install the correct
> bit-version of these components for the operating system you are running
> under. Please note that if you install tomcat onto a 64-bit OS, you must
> have a 64-bit version of Java.  It cannot run a 32-bit JVM.
> Jeff
>> -----Original Message-----
>> From: saj-khan []
>> Sent: Thursday, July 07, 2011 8:53 AM
>> To:
>> Subject: TOMCAT 64bit & 32BIT differences - URGENT
>> Hi All,
>> apologies if this question has been asked before.
>> I need to know the main differences between 64 & 32bit tomcat for
>> windows.
>> Is the tomcat.exe and all associated files in the bin folder and lib
>> folder
>> trully compiled 64bit
>> or is the installer solely 64bit for installing onto 64bit OS? and the
>> tomcat just uses which ever java you have installed to create its jvm?
>> i have been asked to change a set of servers from 32bit to 64bit for
>> tomcat
>> and java
>> if it turns out that the java is the only thing i need ot change it
>> will
>> save me tons of work
>> if the tomcat needs to be installed that nots a biggy as i can copy and
>> paste the tomcat folder into the place of the existing and put back the
>> conf
>> and webapps folder so in theory this will allow me to work as if
>> nothing
>> changed....
>> you answers on the 32-64bit is greatly appreciated!!
>> Saj.
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