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From Mark Thomas <>
Subject Re: TOMCAT 64bit & 32BIT differences - URGENT
Date Fri, 08 Jul 2011 14:36:30 GMT
On 08/07/2011 15:28, Jeffrey Janner wrote:
>> -----Original Message-----
>> From: Mark Thomas []
>> Sent: Thursday, July 07, 2011 9:10 AM
>> To: Tomcat Users List
>> Subject: Re: TOMCAT 64bit & 32BIT differences - URGENT
>> On 07/07/2011 15:07, 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.
>> Wrong. You can quite happily run a 32-bit JVM on 64-bit Windows.
>> Mark
> Mark, you are correct. But I was addressing his desire to go to a full 64-bit implementation
(at least as I read the OP).  And I was assuming he might be using the Windows installer for
Tomcat, not unzipping.  That will set the machine up with only the 64-bit wrappers and native

Wrong again. The Windows installer (at least recent versions anyway)
will install the correct native dlls (32-bit or 64-bit) based on the JVM
selected during installation.


> I really didn't mean to mislead.  I've run both the 32-bit & 64-bit environments
on the same 64-bit Windows OS.  I'll watch my wording next time.
> Jeff
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