I know this is a little off topic but I'm lost as to where to start.

We're currently working on an app and when I went to start Tomcat this
morning I got a java.lang.NoClassDefFoundError: javax/servlet/Filter.

This installation has been working fine for months and the only change was
when I upgraded the struts jars to 2.09 this morning.

I tried going back to 2.08 but that hasn't solved the problem. I tried
googling with no luck.

My environment is:

Tomcat: 6.0.10
JVM: Apple 1.5.0_07-164

The Servlet-api jar looks fine and as I sad it was working perfectly
yesterday. Any help would be so appreciated at this point.

Z.

PS here's the detailed stack trace:

SEVERE: Exception starting filter struts
java.lang.NoClassDefFoundError: javax/servlet/Filter
  at java.lang.ClassLoader.defineClass1(Native Method)
  at java.lang.ClassLoader.defineClass (ClassLoader.java:620)
  at
java.security.SecureClassLoader.defineClass (SecureClassLoader.java:124)
  at java.net.URLClassLoader.defineClass (URLClassLoader.java:260)
  at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass (URLClassLoader.java:188)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:306)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:251)
  at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
a:1273)
  at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
a:1204)
  at
org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilter
Config.java:249)
  at
org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFil
terConfig.java:397)
  at
org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterCon
fig.java:108)
  at
org.apache.catalina.core.StandardContext.filterStart (StandardContext.java:36
93)
  at
org.apache.catalina.core.StandardContext.start (StandardContext.java:4342)
  at
org.apache.catalina.manager.ManagerServlet.start (ManagerServlet.java:1177)
  at
org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java
:542)
  at
org.apache.catalina.manager.HTMLManagerServlet.doGet(HTMLManagerServlet.java
:105)
  at javax.servlet.http.HttpServlet.service (HttpServlet.java:690)
  at javax.servlet.http.HttpServlet.service (HttpServlet.java:803)
  at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:290)
  at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:206)
  at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:228)
  at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:175)
  at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase
.java:525)
  at
org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:128
)
  at
org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:104
)
  at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:109)
  at
org.apache.catalina.connector.CoyoteAdapter.service (CoyoteAdapter.java:216)
  at
org.apache.coyote.http11.Http11Processor.process (Http11Processor.java:844)
  at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http
11Protocol.java:634)
  at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
  at java.lang.Thread.run (Thread.java:613)
Aug 5, 2007 2:02:10 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter struts-cleanup
java.lang.NoClassDefFoundError: javax/servlet/Filter
  at java.lang.ClassLoader.defineClass1(Native Method)
  at java.lang.ClassLoader.defineClass (ClassLoader.java:620)
  at
java.security.SecureClassLoader.defineClass (SecureClassLoader.java:124)
  at java.net.URLClassLoader.defineClass (URLClassLoader.java:260)
  at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass (URLClassLoader.java:188)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:306)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
  at java.lang.ClassLoader.loadClass (ClassLoader.java:251)
  at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
a:1273)
  at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.jav
a:1204)
  at
org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilter
Config.java:249)
  at
org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFil
terConfig.java:397)
  at
org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterCon
fig.java:108)
  at
org.apache.catalina.core.StandardContext.filterStart (StandardContext.java:36
93)
  at
org.apache.catalina.core.StandardContext.start (StandardContext.java:4342)
  at
org.apache.catalina.manager.ManagerServlet.start (ManagerServlet.java:1177)
  at
org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java
:542)
  at
org.apache.catalina.manager.HTMLManagerServlet.doGet(HTMLManagerServlet.java
:105)
  at javax.servlet.http.HttpServlet.service (HttpServlet.java:690)
  at javax.servlet.http.HttpServlet.service (HttpServlet.java:803)
  at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:290)
  at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:206)
  at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:228)
  at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:175)
  at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase
.java:525)
  at
org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:128
)
  at
org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:104
)
  at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:109)
  at
org.apache.catalina.connector.CoyoteAdapter.service (CoyoteAdapter.java:216)
  at
org.apache.coyote.http11.Http11Processor.process (Http11Processor.java:844)
  at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http
11Protocol.java:634)
  at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
  at java.lang.Thread.run (Thread.java:613)