[jboss-osgi-issues] [JBoss JIRA] (JBOSGI-615) VFSAdaptor30 uses non-thread-safe Map, which may result in deadlock

VFSAdaptor30 uses non-thread-safe Map, which may result in deadlock ------------------------------------------------------------------- Key: JBOSGI-615 URL: https://issues.jboss.org/browse/JBOSGI-615 Project: JBoss OSGi Issue Type: Bug Security Level: Public(Everyone can see) Components: Core Framework Affects Versions: JBossOSGi 1.1.1, JBossOSGi 1.2.0, JBossOSGi 2.0.0 Beta1 Environment: all Reporter: Rico Neubauer Assignee: Thomas Diesler Fix For: JBossOSGi 1.2.0 Attachments: jstack_HashMapBugOSGi_vfs.txt org.jboss.osgi.vfs30.VFSAdaptor30 uses a WeakHashMap, which is unsynchronized. However concurrent access may happen, at least in method org.jboss.osgi.vfs30.VFSAdaptor30#unregister(). This may result in a complete deadlock of the application with 100% CPU load, which cannot be resolved besides killing the java-process. See attached thread-dump. Possible solutions: - Use synchronized Map. - Use concurrent, thread-safe map. - If unregister is the only potential concurrent access, synchronizing there would suffice.