Logback SMTPAppender從JNDI查找中拋出異常

Question

編輯：使用logback-1.0.13.jar和JDK 1.6u34。

我有以下WEB-INF/classes/logback.xml一個Java Web應用程序（WAR）：

<configuration debug="true" scan="true" scanPeriod="5 minutes"> 
    <appender name="logManager-smtpAppender" class="ch.qos.logback.classic.net.SMTPAppender"> 
     <filter class="ch.qos.logback.classic.filter.LevelFilter"> 
      <level>WARN</level> 
      <onMatch>ACCEPT</onMatch> 
      <onMismatch>NEUTRAL</onMismatch> 
     </filter> 
     <filter class="ch.qos.logback.classic.filter.LevelFilter"> 
      <level>ERROR</level> 
      <onMatch>ACCEPT</onMatch> 
      <onMismatch>DENY</onMismatch> 
     </filter> 

     <asynchronousSending>false</asynchronousSending> 

     <sessionViaJNDI>true</sessionViaJNDI> 
     <jndiLocation>java:comp/env/mail/Session-local</jndiLocation> 

     <subject>%logger{20} - %m</subject> 
     <layout class="ch.qos.logback.classic.html.HTMLLayout"/> 
     <cyclicBufferTracker class="ch.qos.logback.core.spi.CyclicBufferTracker"> 
      <bufferSize>25</bufferSize> 
     </cyclicBufferTracker> 
    </appender> 

    <root level="ALL"> 
     <appender-ref ref="logManager-consoleAppender" /> 
     <appender-ref ref="logManager-dbAppender" /> 
     <appender-ref ref="logManager-smtpAppender" /> 
    </root> 
</configuration> 

而下面${TOMCAT_HOME}/conf/context.xml（爲所有Web應用程序的全球context.xml）：

<Context> 
    <WatchedResource>WEB-INF/web.xml</WatchedResource> 

    <Resource 
     name="mail/Session-local" 
     auth="Container" 
     type="javax.mail.Session" 
     mail.smtp.host="my.smtp.server" 
     mail.user="smtp_user" 
     mail.password="smtp_password" 
     mail.transport.protocol="smtp" 
     mail.smtp.auth="true" 
     mail.smtp.port="25" 
     mail.smtp.starttls.enable="true" 
    /> 
</Context> 

而且有Java Mail API 1.4.3（我已經驗證包含一個javax.mail.Authenticator類）在我的運行時類路徑WEB-INF/lib/javax-mail-1.4.3.jar）。

而且正在以下堆棧跟蹤：

21:42:58,291 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [logManager-smtpAppender] 
21:42:58,311 |-INFO in ch.qos.logback.classic.net.SMTPAppender[logManager-smtpAppender] - Looking up javax.mail.Session at JNDI location [java:comp/env/mail/Session-local] 
Failed to instantiate [ch.qos.logback.classic.LoggerContext] 
Reported exception: 
java.lang.NoClassDefFoundError: javax/mail/Authenticator 
    at org.apache.naming.factory.MailSessionFactory.getObjectInstance(MailSessionFactory.java:105) 
    at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:140) 
    at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304) 
    at org.apache.naming.NamingContext.lookup(NamingContext.java:793) 
    at org.apache.naming.NamingContext.lookup(NamingContext.java:140) 
    at org.apache.naming.NamingContext.lookup(NamingContext.java:781) 
    at org.apache.naming.NamingContext.lookup(NamingContext.java:140) 
    at org.apache.naming.NamingContext.lookup(NamingContext.java:781) 
    at org.apache.naming.NamingContext.lookup(NamingContext.java:140) 
    at org.apache.naming.NamingContext.lookup(NamingContext.java:781) 
    at org.apache.naming.NamingContext.lookup(NamingContext.java:153) 
    at org.apache.naming.SelectorContext.lookup(SelectorContext.java:152) 
    at javax.naming.InitialContext.lookup(InitialContext.java:392) 
    at ch.qos.logback.core.net.SMTPAppenderBase.lookupSessionInJNDI(SMTPAppenderBase.java:153) 
    at ch.qos.logback.core.net.SMTPAppenderBase.start(SMTPAppenderBase.java:123) 
    at ch.qos.logback.classic.net.SMTPAppender.start(SMTPAppender.java:64) 
    at ch.qos.logback.core.joran.action.AppenderAction.end(AppenderAction.java:96) 
    at ch.qos.logback.core.joran.spi.Interpreter.callEndAction(Interpreter.java:317) 
    at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:196) 
    at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:182) 
    at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:62) 
    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 ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75) 
    at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:148) 
    at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:85) 
    at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:55) 
    at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128) 
    at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:107) 
    at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:295) 
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:269) 
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281) 
    at com.myappapp.server.DummyServlet.<init>(Unknown Source) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513) 
    at java.lang.Class.newInstance0(Class.java:355) 
    at java.lang.Class.newInstance(Class.java:308) 
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1116) 
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    at java.lang.Thread.run(Thread.java:662) 
Caused by: java.lang.ClassNotFoundException: javax.mail.Authenticator 
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247) 
... 53 more 

任何想法，爲什麼我得到的javax.mail.Authenticator的ClassNotFoundException？在運行時類路徑中是否有錯誤版本的Javax Mail（可能URLClassLoader正在使用未定義的構造函數等）？配置不正確？這是一個錯誤？提前致謝！

Answer 1

由於您正在配置容器管理的資源（郵件會話），因此請將郵件JAR放在tomcat的lib文件夾中，而不要放在應用程序的WEB-INF/lib中。