Hello Could somebody please explain if it's ok when statusListener.start method is invoked twice? I.e. can it be bug rather than feature? As far as I understand it's getting invoked from LogerFactory.bind method: private final static void bind() { ... Set<URL> staticLoggerBinderPathSet = null; // skip check under android, see also http://jira.qos.ch/browse/SLF4J-328 if (!isAndroid()) { staticLoggerBinderPathSet = findPossibleStaticLoggerBinderPathSet(); reportMultipleBindingAmbiguity(staticLoggerBinderPathSet); } // the next line does the binding StaticLoggerBinder.getSingleton(); <---fist from here INITIALIZATION_STATE = SUCCESSFUL_INITIALIZATION; reportActualBinding(staticLoggerBinderPathSet); replayEvents(); <---then from here ... } The stacktraces: Connected to the target VM, address: 'localhost:7778', transport: 'socket' at my.app.LogListener.start(PECQuartzListener.java:41) at ch.qos.logback.core.joran.action.StatusListenerAction.end(StatusListenerAction.java:65) at ch.qos.logback.core.joran.spi.Interpreter.callEndAction(Interpreter.java:309) at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:193) at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:179) at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:62) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:155) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:142) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:103) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:53) at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75) at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:150) at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:84) at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:55) at org.slf4j.LoggerFactory.bind(LoggerFactory.java:149) <================================= at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:390) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:340) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:361) at my.app.AuthorisationListener.<init>(AuthorisationListener.java:34) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:422) at com.ibm.ws.managedobject.internal.ManagedObjectFactoryImpl.createManagedObject(ManagedObjectFactoryImpl.java:65) at com.ibm.ws.webcontainer.osgi.webapp.WebApp.inject(WebApp.java:1250) at com.ibm.ws.webcontainer.osgi.webapp.WebApp.injectAndPostConstruct(WebApp.java:1416) at com.ibm.ws.webcontainer.osgi.webapp.WebApp.injectAndPostConstruct(WebApp.java:1404) at com.ibm.ws.webcontainer.osgi.webapp.WebApp.loadListener(WebApp.java:813) at com.ibm.ws.webcontainer.webapp.WebApp.loadLifecycleListeners(WebApp.java:2246) at com.ibm.ws.webcontainer.webapp.WebApp.initialize(WebApp.java:1040) at com.ibm.ws.webcontainer.webapp.WebApp.initialize(WebApp.java:6463) at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApp(DynamicVirtualHost.java:446) at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApplication(DynamicVirtualHost.java:441) at com.ibm.ws.webcontainer.osgi.WebContainer.startWebApplication(WebContainer.java:1000) at com.ibm.ws.webcontainer.osgi.WebContainer.startModule(WebContainer.java:824) at com.ibm.ws.app.manager.web.internal.WebModuleHandlerImpl.deployModule(WebModuleHandlerImpl.java:103) at com.ibm.ws.app.manager.module.internal.DeployedAppInfoBase.deployModule(DeployedAppInfoBase.java:871) at com.ibm.ws.app.manager.module.internal.DeployedAppInfoBase.deployModules(DeployedAppInfoBase.java:831) at com.ibm.ws.app.manager.module.internal.DeployedAppInfoBase.deployApp(DeployedAppInfoBase.java:818) at com.ibm.ws.app.manager.ear.internal.EARApplicationHandlerImpl.install(EARApplicationHandlerImpl.java:84) at com.ibm.ws.app.manager.internal.statemachine.StartAction.execute(StartAction.java:141) at com.ibm.ws.app.manager.internal.statemachine.ApplicationStateMachineImpl.enterState(ApplicationStateMachineImpl.java:1192) at com.ibm.ws.app.manager.internal.statemachine.ApplicationStateMachineImpl.run(ApplicationStateMachineImpl.java:805) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) java.lang.Exception at my.app.LogListener.start(PECQuartzListener.java:41) at ch.qos.logback.core.joran.action.StatusListenerAction.end(StatusListenerAction.java:65) at ch.qos.logback.core.joran.spi.Interpreter.callEndAction(Interpreter.java:309) at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:193) at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:179) at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:62) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:155) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:142) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:103) at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:53) at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75) at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:150) at ch.qos.logback.classic.selector.ContextJNDISelector.getLoggerContext(ContextJNDISelector.java:108) at org.slf4j.impl.StaticLoggerBinder.getLoggerFactory(StaticLoggerBinder.java:108) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:396) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:340) at org.slf4j.LoggerFactory.replaySingleEvent(LoggerFactory.java:220) at org.slf4j.LoggerFactory.replayEvents(LoggerFactory.java:195) at org.slf4j.LoggerFactory.bind(LoggerFactory.java:152) <================================= at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:390) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:340) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:361) at my.app.AuthorisationListener.<init>(AuthorisationListener.java:34) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:422) at com.ibm.ws.managedobject.internal.ManagedObjectFactoryImpl.createManagedObject(ManagedObjectFactoryImpl.java:65) at com.ibm.ws.webcontainer.osgi.webapp.WebApp.inject(WebApp.java:1250) at com.ibm.ws.webcontainer.osgi.webapp.WebApp.injectAndPostConstruct(WebApp.java:1416) at com.ibm.ws.webcontainer.osgi.webapp.WebApp.injectAndPostConstruct(WebApp.java:1404) at com.ibm.ws.webcontainer.osgi.webapp.WebApp.loadListener(WebApp.java:813) at com.ibm.ws.webcontainer.webapp.WebApp.loadLifecycleListeners(WebApp.java:2246) at com.ibm.ws.webcontainer.webapp.WebApp.initialize(WebApp.java:1040) at com.ibm.ws.webcontainer.webapp.WebApp.initialize(WebApp.java:6463) at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApp(DynamicVirtualHost.java:446) at com.ibm.ws.webcontainer.osgi.DynamicVirtualHost.startWebApplication(DynamicVirtualHost.java:441) at com.ibm.ws.webcontainer.osgi.WebContainer.startWebApplication(WebContainer.java:1000) at com.ibm.ws.webcontainer.osgi.WebContainer.startModule(WebContainer.java:824) at com.ibm.ws.app.manager.web.internal.WebModuleHandlerImpl.deployModule(WebModuleHandlerImpl.java:103) at com.ibm.ws.app.manager.module.internal.DeployedAppInfoBase.deployModule(DeployedAppInfoBase.java:871) at com.ibm.ws.app.manager.module.internal.DeployedAppInfoBase.deployModules(DeployedAppInfoBase.java:831) at com.ibm.ws.app.manager.module.internal.DeployedAppInfoBase.deployApp(DeployedAppInfoBase.java:818) at com.ibm.ws.app.manager.ear.internal.EARApplicationHandlerImpl.install(EARApplicationHandlerImpl.java:84) at com.ibm.ws.app.manager.internal.statemachine.StartAction.execute(StartAction.java:141) at com.ibm.ws.app.manager.internal.statemachine.ApplicationStateMachineImpl.enterState(ApplicationStateMachineImpl.java:1192) at com.ibm.ws.app.manager.internal.statemachine.ApplicationStateMachineImpl.run(ApplicationStateMachineImpl.java:805) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) I'm trying to setup logging in an entangled ear app consisting of a bunch of separate war modules using SiftingAppender and JNDIBasedContextDiscriminator deployed to IBM Liberty. Can't reproduce it in simpler configuration. So far I've just removed all modules but one and start still invoked twice (the bp in AuthorisationListener.java:34 is triggered only once). Any help is highly appreciated. logback version is 1.1.7. Best regards, Eugene.