ConcurrentModificationException from AbstractWiring when loading a dynamically imported class --------------------------------------------------------------------------------------------- Key: JBOSGI-805 URL: https://issues.jboss.org/browse/JBOSGI-805 Project: JBoss OSGi Issue Type: Bug Components: framework, resolver Affects Versions: JBossOSGI 2.5.2 Reporter: Hannu Lahtinen Assignee: Arcadiy Ivanov {code} java.util ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) [rt.jar:1.8.0_102] at java.util.ArrayList$Itr.next(ArrayList.java:851) [rt.jar:1.8.0_102] at org.jboss.osgi.resolver.spi.AbstractWiring.addProvidedWire(AbstractWiring.java:120) at org.jboss.osgi.framework.internal.FallbackLoader.loadClassLocal (FallbackLoader.java:165) at org.jboss.modules.Module.loadModuleClass(Module.java:613) [jboss-modules.jar:1.5.1.Final] at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190) [jboss-modules.jar:1.5.1.Final] at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:363) [jboss-modules.jar:1.5.1.Final] at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:351) [jboss-modules.jar:1.5.1.Final] at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:93) [jboss-modules.jar:1.5.1.Final] ... {code} Steps that cause the exception to occur: 1. bundle with DIP: * in MANIFEST. 2. 2 different threads call above mentioned bundle with the same class that needs to be imported dynamically. This exception is timing based and does not happen every time but in our environment happens about 20% of the time.