I just pulled the latest activiti branch (3/3/16 9am central). The build failed with:
[ERROR] Failed to execute goal on project activiti-mule: Could not resolve dependencies for project org.activiti:activiti-mule:jar:5.20.0-SNAPSHOT: Failed to collect dependencies at org.mule.transports:mule-transport-vm:jar:3.5.0 -> org.mule.modules:mule-module-xml:jar:3.5.0 -> net.java.dev.stax-utils:stax-utils:jar:20080702: Failed to read artifact descriptor for net.java.dev.stax-utils:stax-utils:jar:20080702: Could not transfer artifact net.java.dev.stax-utils:stax-utilsom:20080702 from/to codehaus (http://repository.codehaus.org😞 Failed to transfer file: http://repository.codehaus.org/net/java/dev/stax-utils/stax-utils/20080702/stax-utils-20080702.pom. Return code is: 503 , ReasonPhraseervice Unavailable. -> [Help 1]