title: Tomcat server wont start in eclipse due to servlet
body: <p>I'm writing a program that's parsing an XML file to java objects using smooks. I've been asked to run this as a servlet. The application (before being converted to a servlet) worked just fine, but the tomcat server crashes every time I try to run it. Now I've run an example servlet with no problems.</p>
  
  <p>Here's the console upon startup:</p>
  
  <pre><code>Jun 11, 2012 3:46:59 PM org.apache.catalina.core.AprLifecycleListener init
  INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre7\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;"C:\Program Files (x86)\Common Files\EMC";C:\PROGRA~2\COMMON~1\EMC;.
  Jun 11, 2012 3:46:59 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
  WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Serverlet' did not find a matching property.
  Jun 11, 2012 3:46:59 PM org.apache.coyote.AbstractProtocol init
  INFO: Initializing ProtocolHandler ["http-bio-8080"]
  Jun 11, 2012 3:46:59 PM org.apache.coyote.AbstractProtocol init
  INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
  Jun 11, 2012 3:46:59 PM org.apache.catalina.startup.Catalina load
  INFO: Initialization processed in 966 ms
  Jun 11, 2012 3:46:59 PM org.apache.catalina.core.StandardService startInternal
  INFO: Starting service Catalina
  Jun 11, 2012 3:46:59 PM org.apache.catalina.core.StandardEngine startInternal
  INFO: Starting Servlet Engine: Apache Tomcat/7.0.27
  Jun 11, 2012 3:47:00 PM org.apache.catalina.util.SessionIdGenerator createSecureRandom
  INFO: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [156] milliseconds.
  Jun 11, 2012 3:47:01 PM org.apache.catalina.core.ContainerBase startInternal
  SEVERE: A child container failed during start
  java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Serverlet]]
      at java.util.concurrent.FutureTask$Sync.innerGet(Unknown Source)
      at java.util.concurrent.FutureTask.get(Unknown Source)
      at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128)
      at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
      at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
      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)
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Serverlet]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      ... 7 more
  Caused by: org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 60
      at org.apache.tomcat.util.bcel.classfile.Constant.readConstant(Constant.java:131)
      at org.apache.tomcat.util.bcel.classfile.ConstantPool.&lt;init&gt;(ConstantPool.java:60)
      at org.apache.tomcat.util.bcel.classfile.ClassParser.readConstantPool(ClassParser.java:209)
      at org.apache.tomcat.util.bcel.classfile.ClassParser.parse(ClassParser.java:119)
      at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2032)
      at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:1923)
      at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1891)
      at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1877)
      at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1270)
      at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:855)
      at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345)
      at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
      at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
      at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 7 more
  
  Jun 11, 2012 3:47:01 PM org.apache.catalina.core.ContainerBase startInternal
  SEVERE: A child container failed during start
  java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
      at java.util.concurrent.FutureTask$Sync.innerGet(Unknown Source)
      at java.util.concurrent.FutureTask.get(Unknown Source)
      at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128)
      at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:675)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450)
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
      at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
      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)
  Caused by: org.apache.catalina.LifecycleException: A child container failed during start
      at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136)
      at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 7 more
  
  Jun 11, 2012 3:47:01 PM org.apache.catalina.startup.Catalina start
  SEVERE: Catalina.start: 
  org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:675)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450)
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 7 more
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 9 more
  Caused by: org.apache.catalina.LifecycleException: A child container failed during start
      at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136)
      at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 11 more
  </code></pre>
  
  <p>any thoughts?</p>
  
  <hr>
  
  <p>I rewrote the program to no avail, however the error you were talking about before ("invalid byte tag in constant pool") is gone. this time, there is nothing in my WEB_INF/lib folder.</p>
  
  <pre><code>Jun 12, 2012 11:30:30 AM org.apache.catalina.core.AprLifecycleListener init
  INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre7\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;"C:\Program Files (x86)\Common Files\EMC";C:\PROGRA~2\COMMON~1\EMC;.
  Jun 12, 2012 11:30:31 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
  WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:SecondTry' did not find a matching property.
  Jun 12, 2012 11:30:31 AM org.apache.coyote.AbstractProtocol init
  INFO: Initializing ProtocolHandler ["http-bio-8080"]
  Jun 12, 2012 11:30:31 AM org.apache.coyote.AbstractProtocol init
  INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
  Jun 12, 2012 11:30:31 AM org.apache.catalina.startup.Catalina load
  INFO: Initialization processed in 1265 ms
  Jun 12, 2012 11:30:31 AM org.apache.catalina.core.StandardService startInternal
  INFO: Starting service Catalina
  Jun 12, 2012 11:30:31 AM org.apache.catalina.core.StandardEngine startInternal
  INFO: Starting Servlet Engine: Apache Tomcat/7.0.27
  Jun 12, 2012 11:30:32 AM org.apache.catalina.core.ContainerBase startInternal
  SEVERE: A child container failed during start
  java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/SecondTry]]
      at java.util.concurrent.FutureTask$Sync.innerGet(Unknown Source)
      at java.util.concurrent.FutureTask.get(Unknown Source)
      at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128)
      at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
      at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
      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)
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/SecondTry]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      ... 7 more
  Caused by: java.lang.NoClassDefFoundError: org/milyn/SmooksException
      at java.lang.Class.getDeclaredMethods0(Native Method)
      at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
      at java.lang.Class.getDeclaredMethods(Unknown Source)
      at org.apache.catalina.startup.WebAnnotationSet.getDeclaredMethods(WebAnnotationSet.java:470)
      at org.apache.catalina.startup.WebAnnotationSet.loadMethodsAnnotation(WebAnnotationSet.java:275)
      at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:137)
      at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:66)
      at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:381)
      at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:858)
      at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345)
      at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
      at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
      at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 7 more
  Caused by: java.lang.ClassNotFoundException: org.milyn.SmooksException
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
      ... 21 more
  
  Jun 12, 2012 11:30:32 AM org.apache.catalina.core.ContainerBase startInternal
  SEVERE: A child container failed during start
  java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
      at java.util.concurrent.FutureTask$Sync.innerGet(Unknown Source)
      at java.util.concurrent.FutureTask.get(Unknown Source)
      at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128)
      at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:675)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450)
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
      at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
      at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
      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)
  Caused by: org.apache.catalina.LifecycleException: A child container failed during start
      at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136)
      at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 7 more
  
  Jun 12, 2012 11:30:32 AM org.apache.catalina.startup.Catalina start
  SEVERE: Catalina.start: 
  org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at org.apache.catalina.startup.Catalina.start(Catalina.java:675)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
      at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450)
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 7 more
  Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
      at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 9 more
  Caused by: org.apache.catalina.LifecycleException: A child container failed during start
      at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136)
      at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
      at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
      ... 11 more
  
  Jun 12, 2012 11:30:32 AM org.apache.catalina.startup.Catalina start
  INFO: Server startup in 810 ms
  </code></pre>