I am using JDBCSessionIdManager to store my session ID's in MySQL so they can be used across webapps and server restarts.
After upgrading from 7.1.5 to 7.2.2 I started receiving this (being thrown from the webapp's context.xml file):
2010-12-22 03:47:53.496:INFO::Deployable added: /home/qa/opt/jetty-hightide-7.2.2.v20101205/contexts/link-core-webapp.xml
2010-12-22 03:47:53.526:WARN::Config error at <Set name="idManager">|??????<Ref id="jdbcIdMgr"/>|?????</Set> java.lang.IllegalStateException: No object for id=jdbcIdMgr
2010-12-22 03:47:53.526:WARN::Config error at <Set name="sessionHandler">|??<New class="org.eclipse.jetty.server.session.SessionHandler"><Arg>|????<New id="jdbcmgr" class="org.eclipse.jetty.server.session.JDBCSessionManager"><Set name="idManager">|??????<Ref id="jdbcIdMgr"/>|?????</Set></New>|???</Arg></New>|?</Set> java.lang.IllegalStateException: No object for id=jdbcIdMgr
2010-12-22 03:47:53.526:WARN::Unable to reach node goal: started
java.lang.IllegalStateException: No object for id=jdbcIdMgr
at org.eclipse.jetty.xml.XmlConfiguration.refObj(XmlConfiguration.java:685)