Keycloak jetty adapter cannot be installed in Apache Karaf - jetty

Question

I use Apache Karaf 4.2.8. I installed keycloak osgi features. I could configure authentication for karaf shell with keycloak using keycloak-jaas feature.
Now I want to configure authentication for my services under /cxf context.
I configured pax-web context so login-method is KEYCLOAK.
But I have to install keycloak-jetty-adapter as well, so it could be integrated. But when I try to install that feature I receive an error.
trun()> feature:install keycloak-jetty9-adapter
org.apache.felix.resolver.reason.ReasonException: Unable to resolve
root: missing requirement [root] osgi.identity;
osgi.identity=keycloak-jetty9-adapter; type=karaf.feature;
version="[8.0.1,8.0.1]";
filter:="(&(osgi.identity=keycloak-jetty9-adapter)(type=karaf.feature)(version>=8.0.1)(version<=8.0.1))" [caused by: Unable to resolve keycloak-jetty9-adapter/8.0.1: missing
requirement [keycloak-jetty9-adapter/8.0.1] osgi.identity;
osgi.identity=jetty; type=karaf.feature; version="[9.2.0,9.3.0)"] at
org.apache.felix.resolver.Candidates$MissingRequirementError.toException(Candidates.java:1343)
at
org.apache.felix.resolver.ResolverImpl.doResolve(ResolverImpl.java:392)
at
org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:378)
at
org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:332)
at
org.apache.karaf.features.internal.region.SubsystemResolver.resolve(SubsystemResolver.java:257)
at
org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:388)
at
org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1058)
at
org.apache.karaf.features.internal.service.FeaturesServiceImpl.lambda$doProvisionInThread$13(FeaturesServiceImpl.java:994)
at java.util.concurrent.FutureTask.run(FutureTask.java:266) at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748) Caused by:
org.apache.felix.resolver.reason.ReasonException: Unable to resolve
keycloak-jetty9-adapter/8.0.1: missing requirement
[keycloak-jetty9-adapter/8.0.1] osgi.identity; osgi.identity=jetty;
type=karaf.feature; version="[9.2.0,9.3.0)" at
org.apache.felix.resolver.Candidates$MissingRequirementError.toException(Candidates.java:1343)
... 12 more Error executing command: Unable to resolve root: missing
requirement [root] osgi.identity;
osgi.identity=keycloak-jetty9-adapter; type=karaf.feature;
version="[8.0.1,8.0.1]";
filter:="(&(osgi.identity=keycloak-jetty9-adapter)(type=karaf.feature)(version>=8.0.1)(version<=8.0.1))" [caused by: Unable to resolve keycloak-jetty9-adapter/8.0.1: missing
requirement [keycloak-jetty9-adapter/8.0.1] osgi.identity;
osgi.identity=jetty; type=karaf.feature; version="[9.2.0,9.3.0)"]
If not to install that adapter, then I cannot reach my service (I receive 403 Forbidden) as it is protected via pax-web but authentication is impossible.
It seems that jetty within karaf is embedded and does not contain all features, which does not allow me to install jetty adapter.

Answer 1

According to the release notes for Apache Karaf 4.2.8, Karaf is using Jetty 9.4.22, which seems to be outside of your range in the error message version="[9.2.0,9.3.0)"
You'll either need to upgrade Keycloak to one that support Jetty 9.4.x
or downgrade Karaf to one that supports the same version of Jetty that Keycloak uses.