Subsystem does not install because feature subsystem exports all constituents

The resolver will try endlessly to resolve the situation presented to it. You do have to restart the subsystem core bundle before this happens because after that the feature exports all constituent capabilities.

While debugging it shows the following messages:

org.osgi.service.resolver.ResolutionException: Uses constraint violation. Unable to resolve resource nl.capesystemsintegration.testcu.bus.testms.container-infra [org.apache.aries.subsystem.core.internal.BasicSubsystem@73ed4f] because it exports package 'net.sf.saxon.sxpath' and is also exposed to it from resource org.apache.servicemix.bundles.saxon [osgi.identity; osgi.identity="org.apache.servicemix.bundles.saxon"; type="osgi.bundle"; version:Version="9.4.0.7_1"] via the following dependency chain:

nl.capesystemsintegration.testcu.bus.testms.container-infra [org.apache.aries.subsystem.core.internal.BasicSubsystem@73ed4f]
import: (&(osgi.wiring.package=net.sf.saxon.trans)(&(version>=9.4.0)(!(version>=10.0.0))))

export: osgi.wiring.package: net.sf.saxon.trans; uses:=net.sf.saxon.sxpath
export: osgi.wiring.package=net.sf.saxon.sxpath
org.apache.servicemix.bundles.saxon [osgi.identity; osgi.identity="org.apache.servicemix.bundles.saxon"; type="osgi.bundle"; version:Version="9.4.0.7_1"]