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java.lang.ClassNotFoundException: org.slf4j.event.LoggingEvent	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)	at java.lang.Class.getDeclaredMethods0(Native Method)	at java.lang.Class.privateGetDeclaredMethods(Class.java:2615)	at java.lang.Class.privateGetPublicMethods(Class.java:2733)	at java.lang.Class.getMethods(Class.java:1472)	at java.beans.Introspector.getPublicDeclaredMethods(Introspector.java:1280)	at java.beans.Introspector.getTargetMethodInfo(Introspector.java:1141)	at java.beans.Introspector.getBeanInfo(Introspector.java:416)	at java.beans.Introspector.getBeanInfo(Introspector.java:163)	at ch.qos.logback.core.joran.util.PropertySetter.introspect(PropertySetter.java:79)	at ch.qos.logback.core.joran.util.PropertySetter.getMethod(PropertySetter.java:393)	at ch.qos.logback.core.joran.util.PropertySetter.findAdderMethod(PropertySetter.java:203)	at ch.qos.logback.core.joran.util.PropertySetter.computeAggregationType(PropertySetter.java:177)	at ch.qos.logback.core.joran.action.NestedComplexPropertyIA.isApplicable(NestedComplexPropertyIA.java:61)	at ch.qos.logback.core.joran.spi.Interpreter.lookupImplicitAction(Interpreter.java:237)	at ch.qos.logback.core.joran.spi.Interpreter.getApplicableActionList(Interpreter.java:256)	at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:144)	at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:129)	at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:50)	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:149)	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:135)	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:99)	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:49)	at org.springframework.boot.logging.logback.LogbackLoggingSystem.configureByResourceUrl(LogbackLoggingSystem.java:163)	at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:135)	at org.springframework.boot.logging.logback.LogbackLoggingSystem.reinitialize(LogbackLoggingSystem.java:195)	at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithConventions(AbstractLoggingSystem.java:64)	at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:49)	at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:106)	at org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:301)	at org.springframework.boot.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:253)	at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:225)	at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:201)	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:163)	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:136)	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:119)	at org.springframework.boot.context.event.EventPublishingRunListener.publishEvent(EventPublishingRunListener.java:111)	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:65)	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)	at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:330)	at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191)	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180)	at com.xmd.spa.ApplicationMain.main(ApplicationMain.java:25)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)