title: Classpath issue between jetty-maven-plugin and tomcat-jdbc 8.0.9+ leading to ServiceConfigurationError
body: <p>I'm working on an app using :</p>
  
  <p>jetty-maven-plugin:9.3.2.v20150730<br>
  tomcat-jdbc:8.0.8 (which has tomcat-juli as dependency)</p>
  
  <p>After trying to upgrade the tomcat-jdbc jar to any version beyond 8.0.9+ I get the following error:</p>
  
  <blockquote>
    <p>java.util.ServiceConfigurationError: org.apache.juli.logging.Log:
    Provider org.eclipse.jetty.apache.jsp.JuliLog not a subtype</p>
  </blockquote>
  
  <p>Looking the changelog between those 2 versions I've found something that looks suspicious:</p>
  
  <p><em>"Add a simple ServiceLoader based discovery mechanism to the JULI LogFactory to make it easier to use JULI and Tomcat components that depend on JULI (such as Jasper) independently from Tomcat. Patch provided by Greg Wilkins. (markt)"</em></p>
  
  <p>Also, I've found that a new system property was introduced in the Apache Tomcat JDBC Connection Pool:</p>
  
  <p><strong>org.apache.tomcat.jdbc.pool.onlyAttemptCurrentClassLoader</strong></p>
  
  <p><em>"Controls classloading of dynamic classes, such as JDBC drivers, interceptors and validators. If set to false, default value, the pool will first attempt to load using the current loader (i.e. the class loader that loaded the pool classes) and if class loading fails attempt to load using the thread context loader. Set this value to true, if you wish to remain backwards compatible with Apache Tomcat 8.0.8 and earlier, and only attempt the current loader. If not set then the default value is false."</em> </p>
  
  <p>Unfortunately, starting the plugin with jetty:run using this property didn't resolve the issue.</p>
  
  <p>Any help would be appreciated! Thanks!</p>
  
  <p>Stack trace and dependencies tree :</p>
  
  <pre>
  Caused by: 
  java.util.ServiceConfigurationError: org.apache.juli.logging.Log: Provider org.eclipse.jetty.apache.jsp.JuliLog not a subtype
      at java.util.ServiceLoader.fail(ServiceLoader.java:239)
      at java.util.ServiceLoader.access$300(ServiceLoader.java:185)
      at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:376)
      at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
      at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
      at org.apache.juli.logging.LogFactory.(LogFactory.java:78)
      at org.apache.juli.logging.LogFactory.(LogFactory.java:66)
      at org.apache.tomcat.jdbc.pool.DataSourceFactory.(DataSourceFactory.java:58)
      at local.ristretto.persistence.datasource.mail.MailDataSourceConfiguration.dataSource(MailDataSourceConfiguration.java:31)
      at local.ristretto.persistence.datasource.mail.MailDataSourceConfiguration$$EnhancerBySpringCGLIB$$497970dd.CGLIB$dataSource$0()
      at local.ristretto.persistence.datasource.mail.MailDataSourceConfiguration$$EnhancerBySpringCGLIB$$497970dd$$FastClassBySpringCGLIB$$2ba2dde9.invoke()
      at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
      at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:309)
      at local.ristretto.persistence.datasource.mail.MailDataSourceConfiguration$$EnhancerBySpringCGLIB$$497970dd.dataSource()
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:497)
      at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
      at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
      at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
      at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
      at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
      at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
      at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
      at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813)
      at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
      at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:464)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
      at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
      at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
      at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
      at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
      at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:956)
      at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:747)
      at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
      at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:434)
      at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
      at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
      at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:798)
      at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:530)
      at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:771)
      at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:342)
      at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1368)
      at org.eclipse.jetty.maven.plugin.JettyWebAppContext.startWebapp(JettyWebAppContext.java:320)
      at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1335)
      at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:735)
      at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:259)
      at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:511)
      at org.eclipse.jetty.maven.plugin.JettyWebAppContext.doStart(JettyWebAppContext.java:403)
      at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
      at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
      at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
      at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
      at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:161)
      at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
      at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
      at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
      at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
      at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
      at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
      at org.eclipse.jetty.server.Server.start(Server.java:405)
      at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:106)
      at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
      at org.eclipse.jetty.server.Server.doStart(Server.java:372)
      at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
      at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:457)
      at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:328)
      at org.eclipse.jetty.maven.plugin.JettyRunMojo.execute(JettyRunMojo.java:170)
      at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
      at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
      at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
      at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
      at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
      at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
      at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)
      at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)
      at org.apache.maven.cli.MavenCli.execute(MavenCli.java:582)
      at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
      at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:497)
      at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
      at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
      at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
      at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
      at org.codehaus.classworlds.Launcher.main(Launcher.java:46)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:497)
      at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
  </pre>
  
  <pre>
  [INFO] |  +- org.springframework.data:spring-data-jpa:jar:1.8.2.RELEASE:compile               
  [INFO] |  |  +- org.springframework.data:spring-data-commons:jar:1.10.2.RELEASE:compile       
  [INFO] |  |  +- org.springframework:spring-orm:jar:4.1.7.RELEASE:compile                      
  [INFO] |  |  |  \- org.springframework:spring-jdbc:jar:4.1.7.RELEASE:compile                  
  [INFO] |  |  +- org.springframework:spring-tx:jar:4.1.7.RELEASE:compile                       
  [INFO] |  |  \- org.aspectj:aspectjrt:jar:1.8.6:compile                                       
  [INFO] |  +- org.postgresql:postgresql:jar:9.4-1202-jdbc42:compile                            
  [INFO] |  +- org.apache.tomcat:tomcat-jdbc:jar:8.0.9:compile                                 
  [INFO] |  |  \- org.apache.tomcat:tomcat-juli:jar:8.0.9:compile                              
  [INFO] |  +- org.hibernate:hibernate-entitymanager:jar:5.0.1.Final:compile                    
  [INFO] |  |  +- org.jboss.logging:jboss-logging:jar:3.3.0.Final:compile                       
  [INFO] |  |  +- org.hibernate:hibernate-core:jar:5.0.1.Final:compile                          
  [INFO] |  |  |  +- antlr:antlr:jar:2.7.7:compile                                              
  [INFO] |  |  |  \- org.jboss:jandex:jar:1.2.2.Final:compile                                   
  [INFO] |  |  +- dom4j:dom4j:jar:1.6.1:compile                                                 
  [INFO] |  |  |  \- xml-apis:xml-apis:jar:1.0.b2:compile                                       
  [INFO] |  |  +- org.hibernate.common:hibernate-commons-annotations:jar:5.0.0.Final:compile    
  [INFO] |  |  +- org.hibernate.javax.persistence:hibernate-jpa-2.1-api:jar:1.0.0.Final:compile 
  [INFO] |  |  +- org.apache.geronimo.specs:geronimo-jta_1.1_spec:jar:1.1.1:compile             
  [INFO] |  |  \- org.javassist:javassist:jar:3.18.1-GA:compile                                 
  [INFO] |  \- com.fasterxml.jackson.core:jackson-databind:jar:2.6.1:compile                    
  [INFO] |     +- com.fasterxml.jackson.core:jackson-annotations:jar:2.6.1:compile              
  [INFO] |     \- com.fasterxml.jackson.core:jackson-core:jar:2.6.1:compile                     
  
  [INFO] |  +- org.slf4j:jcl-over-slf4j:jar:1.7.12:compile                                      
  [INFO] |  +- org.slf4j:jul-to-slf4j:jar:1.7.12:compile                                        
  [INFO] |  +- org.slf4j:log4j-over-slf4j:jar:1.7.12:compile                                    
  [INFO] |  +- org.slf4j:slf4j-api:jar:1.7.12:compile                                           
  [INFO] |  +- ch.qos.logback:logback-classic:jar:1.1.3:compile                                 
  [INFO] |  |  \- ch.qos.logback:logback-core:jar:1.1.3:compile                                 
  [INFO] |  +- org.wicketstuff:wicketstuff-logback:jar:6.20.0:compile                           
  [INFO] |  +- org.apache.commons:commons-lang3:jar:3.4:compile                                 
  [INFO] |  +- org.apache.commons:commons-collections4:jar:4.0:compile                          
  [INFO] |  +- commons-io:commons-io:jar:2.4:compile                                            
  [INFO] |  +- commons-codec:commons-codec:jar:1.10:compile                                     
  [INFO] |  +- commons-beanutils:commons-beanutils:jar:1.9.2:compile                            
  [INFO] |  |  \- commons-collections:commons-collections:jar:3.2.1:compile                     
  [INFO] |  \- com.google.guava:guava:jar:18.0:compile                                          
  [INFO] +- junit:junit:jar:4.12:test                                                           
  [INFO] |  \- org.hamcrest:hamcrest-core:jar:1.3:test                                          
  [INFO] +- org.springframework:spring-test:jar:4.1.7.RELEASE:test                              
  [INFO] |  \- org.springframework:spring-core:jar:4.1.7.RELEASE:compile                        
  [INFO] +- org.springframework:spring-web:jar:4.1.7.RELEASE:compile                            
  [INFO] |  +- org.springframework:spring-aop:jar:4.1.7.RELEASE:compile                         
  [INFO] |  |  \- aopalliance:aopalliance:jar:1.0:compile                                       
  [INFO] |  +- org.springframework:spring-beans:jar:4.1.7.RELEASE:compile                       
  [INFO] |  \- org.springframework:spring-context:jar:4.1.7.RELEASE:compile                     
  [INFO] |     \- org.springframework:spring-expression:jar:4.1.7.RELEASE:compile               
  [INFO] \- javax:javaee-web-api:jar:7.0:provided
  </pre>