Unable to load bundle in Karaf

Question

I’m following this tutorial https://wiki.onosproject.org/display/ONOS/Template+Application+Tutorial for creating a CLI command that allows me to block an OF switch’s interface throught intent. I built ONOS using Bazel as suggested here https://wiki.onosproject.org/display/ONOS/Developer+Quick+Start and everything has gone well, even the creation and installation of the template application into ONOS. Now in the java class AppCommand I imported the package org.onosproject.openflow.controller.OpenFlowController, adding in the pom.xml file the dependency with artifactID and groupID onos-of-api-1.6.0 and when I reinstall the application this error is thrown:

Unable to perform operation on application org.foo.app
org.apache.felix.resolver.reason.ReasonException: Unable to resolve root: missing requirement [root] osgi.identity; osgi.identity=foo-app; type=karaf.feature; version="[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT]"; filter:="(&(osgi.identity=foo-app)(type=karaf.feature)(version>=1.0.0.SNAPSHOT)(version<=1.0.0.SNAPSHOT))" [caused by: Unable to resolve foo-app/1.0.0.SNAPSHOT: missing requirement [foo-app/1.0.0.SNAPSHOT] osgi.identity; osgi.identity=org.foo.foo-app; type=osgi.bundle; version="[1.0.0.SNAPSHOT,1.0.0.SNAPSHOT]"; resolution:=mandatory [caused by: Unable to resolve org.foo.foo-app/1.0.0.SNAPSHOT: missing requirement [org.foo.foo-app/1.0.0.SNAPSHOT] osgi.wiring.package; filter:="(&(osgi.wiring.package=org.onosproject.openflow.controller)(version>=1.6.0)(!(version>=2.0.0)))"]]
at org.apache.felix.resolver.Candidates$MissingRequirementError.toException(Candidates.java:1343) ~[?:?]
at org.apache.felix.resolver.ResolverImpl.doResolve(ResolverImpl.java:392) ~[?:?]
at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:378) ~[?:?]
at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:332) ~[?:?]
at org.apache.karaf.features.internal.region.SubsystemResolver.resolve(SubsystemResolver.java:257) ~[?:?]
at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:393) ~[?:?]
at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1062) ~[?:?]
at org.apache.karaf.features.internal.service.FeaturesServiceImpl.lambda$doProvisionInThread$13(FeaturesServiceImpl.java:998) ~[?:?]
at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
at java.lang.Thread.run(Thread.java:834) [?:?]

It seems that there is a problem with the version of the dependency but I don’t understand why.

Thanks a lot for you attention.

Answer 1

The error message you’re getting from Karaf suggests that you have a dependency which isn’t satisfied. this often happens when you have a dependency which doesn’t have (or has incorrect) OSGi metadata in the MANIFEST.MF file. You should open it up and determine if the build system you’ve used has included it, and if so, whether or not the dependencies are present are also OSGi-ified bundles.

In this case, check to see if the Jar that has the org.onosproject.openflow.controller is an OSGi bundle — it doesn’t look like it is.