[FELIX-5131] UnsupportedOperationException when embedding felix in WebSphere

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: framework-5.2.0, resolver-1.6.0
• Fix Version/s: resolver-1.10.0
• Component/s: Framework, Resolver
• Assignee: Tom Watson
• Reporter: Thomas Schurins
• Created: 07/Dec/15 08:39
• Updated: 13/Oct/16 06:39
• Resolved: 08/Mar/16 08:36

Description

Hello, we are embedding the OSGi framework in our application (creating the framework , managing its export packages, contolling the bundles &c.). This works great in a lot of enviroments, but not on WebSphere (using the IBM JDK):

java.lang.UnsupportedOperationException
	at org.apache.felix.resolver.util.CopyOnWriteList.listIterator(CopyOnWriteList.java:218)
	at java.util.Collections.binarySearch(Collections.java:1551)
	at org.apache.felix.framework.ResolveContextImpl.insertHostedCapability(ResolveContextImpl.java:103)
	at org.apache.felix.resolver.Candidates.prepare(Candidates.java:934)
	at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:233)
	at org.apache.felix.resolver.ResolverImpl.resolve(ResolverImpl.java:159)
	at org.apache.felix.framework.StatefulResolver.resolve(StatefulResolver.java:431)
	at org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:4109)
	at org.apache.felix.framework.Felix.startBundle(Felix.java:2111)
	at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1365)
	at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:308)
	at java.lang.Thread.run(Thread.java:790)

The problem seems to be that in the IBM JDK, the Collections.binarySearch method directly uses the listIterator of the list if it is not a RandomAccess list (while the oracle JDK doesn't).

A solution it to add the interface RandomAccess to the CopyOnWriteList class. I've tested this locally and eveything runs fine.