NPE at org.eclipse.osgi.internal.loader.BundleLoader.findRequiredSource

[kyrillzotkin]

java.lang.NullPointerException
	at org.eclipse.osgi.internal.loader.BundleLoader.findRequiredSource(BundleLoader.java:1140)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:413)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:372)
	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:364)
	at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:161)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.getDeclaredFields0(Native Method)
	at java.lang.Class.privateGetDeclaredFields(Class.java:2583)
	at java.lang.Class.getField0(Class.java:2975)
	at java.lang.Class.getField(Class.java:1701)
	at org.enterprisedomain.classmaker.jobs.load.OSGiEPackageLoader.doLoad(OSGiEPackageLoader.java:156)
	at org.enterprisedomain.classmaker.jobs.load.OSGiEPackageLoader.access$0(OSGiEPackageLoader.java:141)
	at org.enterprisedomain.classmaker.jobs.load.OSGiEPackageLoader$1.bundleChanged(OSGiEPackageLoader.java:57)
	at org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:903)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
	at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)

Difficult to reproduce.