Getting java.lang.NoClassDefFoundError: javax/servlet/http/HttpUpgradeHandler

[ChtiSuisse]

Dear all,
I am launching Wiremock using com.github.tomakehurst.wiremock.WiremockServer in wiremock 2.6.0
When trying to call the server, Wiremock replies an 500 error
and logs the following stacktrace :

Any idea ?

java.lang.NoClassDefFoundError: javax/servlet/http/HttpUpgradeHandler
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.getDeclaredMethod(Class.java:2128)
    at com.github.tomakehurst.wiremock.jetty9.JettyUtils.getUri(JettyUtils.java:39)
    at com.github.tomakehurst.wiremock.servlet.WireMockHttpServletRequestAdapter.isBrowserProxyRequest(WireMockHttpServletRequestAdapter.java:213)
    at com.github.tomakehurst.wiremock.verification.LoggedRequest.createFrom(LoggedRequest.java:54)
    at com.github.tomakehurst.wiremock.stubbing.InMemoryStubMappings.serveFor(InMemoryStubMappings.java:75)
    at com.github.tomakehurst.wiremock.core.WireMockApp.serveStubFor(WireMockApp.java:157)
    at com.github.tomakehurst.wiremock.http.StubRequestHandler.handleRequest(StubRequestHandler.java:50)
    at com.github.tomakehurst.wiremock.http.AbstractRequestHandler.handle(AbstractRequestHandler.java:44)
    at com.github.tomakehurst.wiremock.servlet.WireMockHandlerDispatchingServlet.service(WireMockHandlerDispatchingServlet.java:100)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:845)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1712)
    at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:51)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1699)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
    at org.eclipse.jetty.server.Server.handle(Server.java:534)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
    at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpUpgradeHandler
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1892)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1735)
    ... 35 common frames omitted

[Tom Akehurst]

There's a good chance this is because you have an old (pre 3.0) version of the servlet API in your classpath.