ClassNotFoundException for org.osgi.framework.BundleActivator despite of Import-Package

java osgi equinox
André picture André · Aug 24, 2015 · Viewed 7k times · Source

I tried running a really simple OSGi "Hello World"-style example with an activator after a longer while again and got a ClassNotFoundException for org.osgi.framework.BundleActivator (see stack trace below).

The environment is basic Equinox (org.eclipse.osgi_3.7.2...). All bundles (besides mine) are ACTIVE. I have "org.osgi.framework" in my "Import-Package" declaration in the manifest, and I can see the class in the package dependencies in Eclipse.

Can someone give me a hint on what to try to troubleshoot this?

Kind regards, André

Caused by: java.lang.ClassNotFoundException: org.osgi.framework.BundleActivator
at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:513)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:429)
at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 30 more

Answer

André picture André · Aug 24, 2015

Sorry for answering this myself, but others might have a similar confusing issue. What happened was that there was a third party library (in this case Jersey) requiring a newer version of OSGi that I had included. Hence that library could not find (the right version of) BundleActivator.

Related questions

EclipseLink : No Persistence provider for EntityManager named

I'd like to create one Bundle that is able to use Java Persistence. To achieve this, I've created a plugin project within Eclipse. In my project, I've created a persistence.xml file into META-INF. I've aslo added in my MANIFEST.…

Read More
Persistence.xml and OSGi (Equinox)

I am currently testing out using OSGi. I am running this through Eclipse. I want to have my DAO layer as part of an OSGi solution, but my first stumbling block is this error: Jun 29, 2009 6:12:37 PM org.hibernate.cfg.annotations.…

Read More
Starting OSGi bundle

I try to run OSGi plug in in Eclipse. It is empty bundle, but eclipse always send me errors There are my console messages http://pastebin.com/dqQfpQhd What is wrong?

Read More