The problem is caused by a NoSuchMethodError thrown by the Searcher.java file of modules/domain-manager. This is because this file uses the org.apache.commons.lang.StringEscapeUtils.escapeHtml() method which requires commons-lang-2.3. The Tuscany SCA Java 1.6 binary distribution contains commons-lang-2.1 instead of commons-lang-2.3, so the escapeHtml() method isn't found.
Fixed under revision r951571 by updating distribution/bundle/pom.xml to remove the dependency from tuscany-implementation-bpel-ode to commons-lang-2.1. This causes commons-lang-2.3 to be brought in via the dependency from tuscany-domain-manager.