I moved this morning to ActiveMQ 5.0.0 and encountered problems with the dependency on org.apache.activemq:activeio-core:jar:3.1-SNAPSHOT. This led me to the following thread: http://www.mail-archive.com/users@activemq.apache.org/msg04738.html
Using the exclusion fixed my problem. But I what I found disturbing is the dependency of a released version on SNAPSHOTS. This in my eyes not acceptable and anyone who uses the Maven release process will not be able to release the application since a build will be refused if any SNAPSHOT dependency is detected. This makes totally sense since a SNAPSHOT is consider as un unstable version and as we can see might disappear any time. I think that the dependency needs to be fixed in ActiveMQ 5.0.x as soon as possible. Andreas