In a rare condition, an old artemis.pid file is pointing to an existing process that is not Artemis, causing the provisioning tools to believe that Artemis process is running. 

It is just a matter of improving the Artemis-service status script by removing this check:
if [ $? -eq 0 ] ; then
 this:
if [ $? -eq 0 ] && [ `pwdx ${pid} | awk '{print $2}'` == "$ARTEMIS_INSTANCE" ]; then