title: java 8 , tamcat 8: Invalid byte tag in constant pool: 19
body: <p>I have a problem when i start the server.</p>
  
  <p>I Use java 8 and tomcat 8 </p>
  
  <p>Don't know how to fix that.</p>
  
  <pre><code>org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 19
  at org.apache.tomcat.util.bcel.classfile.Constant.readConstant(Constant.java:97)
  at org.apache.tomcat.util.bcel.classfile.ConstantPool.&lt;init&gt;(ConstantPool.java:55)
  at org.apache.tomcat.util.bcel.classfile.ClassParser.readConstantPool(ClassParser.java:176)
  at org.apache.tomcat.util.bcel.classfile.ClassParser.parse(ClassParser.java:85)
  at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2042)
  at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:1988)
  at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1958)
  at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1912)
  at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1157)
  at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:779)
  at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:306)
  at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:95)
  at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
  at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5202)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397)
  at java.util.concurrent.FutureTask.run(Unknown Source)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  at java.lang.Thread.run(Unknown Source)
  </code></pre>
  
  <p>What to problem and how to fix it ?</p>