On 1/16/07, Christopher Schultz <[EMAIL PROTECTED]> wrote:
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David,
David Delbecq wrote:
> If you run two tomcat instances, from same location, at same time you
> will run into various troubles
I think Peter Crowther hit the nail on the head: we are being imprecise
in our terminology.
I've been talking about a single installation (i.e. only one binary copy
of Tomcat) but using several customized instances (separate conf,
webapps, etc. directories).
where does an installation starts...?
There is no trouble with doing this. I do it myself, although with only
a single JVM version, but I know that it is possible. Another poster is
also doing exactly what I describe and it's working just fine.
> 1) The second VM will have problems binding to ports, as the first one
> will already have claimed the port. You can argue to use different
> config, but then it's 2 different installations.
I suppose this is a matter of semantics. When I upgrade my single
installation, I only have to do it once. If I had two copies of that
install, then I would have to upgrade twice (one for each install).
That's why I call this a single installation and not multiple installs.
> 2) Compiling jsp might end up in java 5 format .class, which the java
> 1.4 JVM is unable to load.
Certainly, which is why you want to be careful about not accidentally
running your 1.5-compiled stuff in 1.4, which is unlikely to happen,
given that the OPs requirement is that one of his webapps /always/ runs
under 1.4.
> 3) you will have concurrent access to the work directory by 2 process,
> which can lead to corrupted files.
There are separate work directories, so this is not an issue.
I think you are running two different installations which share server/libs :-)
regards
Leon
- -chris
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