Environment :
Hudson 1.255
Tomcat 6.0.18
Java 1.6.0_07
Maven 2.0.9
Subversion 1.4.5
Windows 2003 Server

I have 4 Maven2 jobs in Hudson, and 3 executors. All the projects are stored on
SVN. Sometimes, when Hudson detects that there are changes on SVN, it puts the
jobs in the build queue, but they never start. The general quiet period of
Hudson is 120sec, it's the same for the 4 jobs. Even after this time the jobs
don't start. To fix this, I have to stop and relaunch Hudson in Tomcat. After
that the jobs that were in queue start and build well.