activemq-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "James Strachan" <>
Subject Re: ActiveMQ 4.2 and IBM JRE 1.4
Date Fri, 25 May 2007 14:52:41 GMT
On 5/25/07, David D. Lucas <> wrote:
> First off, thanks to everyone who put together a great open source package
> like ActiveMQ.  I am very impressed with it.  Great Job!!!
> I am trying to deploy ActiveMQ 4.2 to WebSphere 5.1.  I was able to do
> this with ActiveMQ 4.1, but with 4.2 I am seeing the "Unsupported
> major.minor version 49.0" error.  I assume that the ActiveMQ classes or
> something it is dependent on is compiled with JRE 1.5 byte code instead of
> JRE 1.4.  My assumption, of course, is that 4.2 will continue to support
> JRE 1.4 backward compatibility.  If this is not correct, can someone
> document that or point me to the correct location?

4.2 or later is built with Java 5 by default; since on Java 5 the new
concurrency code is faster & less buggy.

We may get around to creating a separate distro of retrotranslated
jars for 1.4. (Patches most welcome!:)

Until then you can just install the retrotranslator JIT in your JVM to
auto-swizzle any Java 5 jars.

> While I am on the topic with WebSphere, is there a way to use the embedded
> broker on multiple web containers all pointing to the same JDBC
> persistence store?

Just deploy one :)

The issue is from web apps they usually can't see the same broker via
VM transport. So either use TCP, or put the ActiveMQ jars in the
system class path.


View raw message