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http://issues.apache.org/bugzilla/show_bug.cgi?id=35423 Summary: [logging]Need for parent-child classloader relationship prevent JBoss startup Product: Commons Version: Nightly Builds Platform: Other OS/Version: other Status: NEW Severity: normal Priority: P2 Component: Logging AssignedTo: [email protected] ReportedBy: [EMAIL PROTECTED] The current version of LogFactoryImpl in svn requires that there be a parent-child relationship between the thread context classloader and the classloader that loaded LogFactoryImpl. The standard classloading architecture used in JBoss (see below) violates this constraint; as a result JBoss will not start if a version of JCL built from svn is used. The attached patch relaxes this constraint by attempting to load Log adapters starting with the thread context classloader if the two classloaders are not in a parent child relationship. The behavior change only applies if the user has not set the ALLOW_FLAWED_CONTEXT_PROPERTY to true. Background: The JBoss classloading architecture includes something called the UnifiedLoaderRepository. Basically, when JBoss classloaders are asked to load a class they first look to the ULR to see if the class has already been loaded. If it has, they return that class. If not, normal Java classloading occurs, but once the class is loaded, it is registered with the ULR. This setup allows classloaders to see classes loaded by "non-parent" classloaders, e.g. siblings, cousins etc. (BTW, ULRs can be scoped, allowing, for example, a J2EE EAR to isolate its classes from other deployed applications). JBoss loads JCL using a classloader that is not the parent of the classloaders used by a number of JBoss services and by deployed applications. So, if JCL forbids classloading relationships other than parent-child, JBoss will not start properly. -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
