Greetings, it seems I stumbled upon this error too but I cannot find a way out, even moving bundles to the bootFeatures section does not help. As soon as at least one of the dependencies in my feature is not a valid bundle and the wrap feature is added, the build always fails with the error you reported: [ERROR] Failed to execute goal org.apache.karaf.tooling:karaf-maven-plugin:4.0.4:assembly (default-assembly) on project karaf-assembly: Unable to build assembly: Unable to resolve root: missing requirement [root] osgi.identity; osgi.identity=wrap; type=karaf.feature; version=0; filter:="(&(osgi.identity=wrap)(type=karaf.feature)(version>=0.0.0))" [caused by: Unable to resolve wrap/0.0.0: missing requirement [wrap/0.0.0] osgi.identity; osgi.identity=org.ops4j.pax.url.wrap; type=osgi.bundle; version="[2.4.5,2.4.5]"; resolution:=mandatory [caused by: Unable to resolve org.ops4j.pax.url.wrap/2.4.5: missing requirement [org.ops4j.pax.url.wrap/2.4.5] osgi.wiring.package; filter:="(&(osgi.wiring.package=org.slf4j)(version>=1.6.0)(!(version>=2.0.0)))"]]
As you can see, this happens with the latest stable (4.0.4) but also with the latest snapshot available (4.0.5-SNAPSHOT) as well: [ERROR] Failed to execute goal org.apache.karaf.tooling:karaf-maven-plugin:4.0.5-SNAPSHOT:assembly (default-assembly) on project karaf-assembly: Unable to build assembly: Unable to resolve root: missing requirement [root] osgi.identity; osgi.identity=wrap; type=karaf.feature; version=0; filter:="(&(osgi.identity=wrap)(type=karaf.feature)(version>=0.0.0))" [caused by: Unable to resolve wrap/0.0.0: missing requirement [wrap/0.0.0] osgi.identity; osgi.identity=org.ops4j.pax.url.wrap; type=osgi.bundle; version="[2.4.6,2.4.6]"; resolution:=mandatory [caused by: Unable to resolve org.ops4j.pax.url.wrap/2.4.6: missing requirement [org.ops4j.pax.url.wrap/2.4.6] osgi.wiring.package; filter:="(&(osgi.wiring.package=org.slf4j)(version>=1.6.0)(!(version>=2.0.0)))"]] I thought this might be caused by pax-logging-api not being included, but AFAICT it's part of the "standard" feature which I indeed added to my bootFeatures. Shall we open a bug report about this? -- View this message in context: http://karaf.922171.n3.nabble.com/Karaf-4-0-3-Problem-Building-Karaf-with-maven-tp4045152p4045714.html Sent from the Karaf - User mailing list archive at Nabble.com.