[KARAF-7779] Problem installing feature with fragment bundle for existing host bundle

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.4.4
• Fix Version/s: 4.5.0, 4.4.5, 4.3.11
• Component/s: karaf
• Assignee: Grzegorz Grzybek
• Reporter: Grzegorz Grzybek
• Created: 13/Nov/23 07:25
• Updated: 17/Nov/23 13:32
• Resolved: 17/Nov/23 13:32

Description

In my custom Karaf distro with custom KAR which uses Pax Web and fragment bundles (for javax-el-api), I had this problem:

java.lang.IllegalStateException: Resource has no uri
	at org.apache.karaf.features.internal.service.Deployer.getBundleInputStream(Deployer.java:1631)
	at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:904)
...

After quite complex investigation I was able to prepare a Karaf test case and the problem can be described like this:

• we install a feature which contains fragment bundle which can be attached to already existing bundle
• Karaf resolver/deployer treats already installed bundles as BundleRevisions (without osgi.content namespaced capabilities. url is part of Bundle capabilities only
• during resolver procedure, I had this:

  {org.apache.felix.framework.BundleRevisionImpl@7703} "org.apache.servicemix.specs.javax-el-api-3.0.0 [39](R 39.0)" -> {java.util.ArrayList@11407}  size = 3
   key: org.apache.felix.framework.BundleRevisionImpl  = {org.apache.felix.framework.BundleRevisionImpl@7703} "org.apache.servicemix.specs.javax-el-api-3.0.0 [39](R 39.0)"
   value: java.util.ArrayList  = {java.util.ArrayList@11407}  size = 3
    0 = {org.apache.felix.resolver.WireImpl@11791} "[org.apache.servicemix.specs.javax-el-api-3.0.0 [39](R 39.0)] osgi.wiring.package; (&(osgi.wiring.package=org.osgi.framework)(version>=1.6.0)(!(version>=2.0.0))) -> [org.apache.felix.framework [0](R 0)]"
    1 = {org.apache.felix.resolver.WireImpl@11792} "[org.apache.servicemix.specs.javax-el-api-3.0.0 [39](R 39.0)] osgi.ee; (&(osgi.ee=JavaSE)(version=1.7)) -> [org.apache.felix.framework [0](R 0)]"
    2 = {org.apache.felix.resolver.WireImpl@9972} "[org.jboss.fuse.modules.fuse-el2-compatibility/7.12.1.fuse-7_12_1-00009-redhat-00001] osgi.identity; osgi.identity="root#pax-web-jsp-8.0.23"; type=karaf.subsystem; version="[0,0.0.0]"; resolution:=mandatory -> [root#pax-web-jsp-8.0.23]"
  

  which means that the fragment added a wire to the host bundle. The wire ties the BundleRevision resource to feature's subsystem, effectively marking already existing BundleRevision as a resource to install.

The problem is that there's no osgi.content; url=xxx capability inside existing BundleRevision.