how do i solve this? " java.lang.NoClassDefFoundError: com_cenqua_clover/CoverageRecorder "

I am testing code instrumentation on web app(contains servlet).I am using maven(with clover plugin) for build this.I compiled and deployed without errors.But when try to open HelloWorld servlet on server.I had this error:

org.apache.catalina.core.StandardWrapperValve invoke

SEVERE: Servlet.service() for servlet [HelloWorld] in context with path [/my-webapp-clover] threw exception [Servlet execution threw an exception] with root cause

java.lang.NoClassDefFoundError: com_cenqua_clover/CoverageRecorder

at com.yapikredi.app.HelloWorld.doGet(HelloWorld.java:14)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

thanks in advance

2 answers

1 accepted

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It is looking for clover jar at runtime it seems.

Do I need to configurate classpath

Ideally, it shouldn't be needed at runtime but try adding it in classpath and see if it works. I don't know why clover is required during runtime!

I am new at this how do i do this ? pls can you give a walkthrough

Thanks to you i solved it.

I add .classpath file to web app in server.This classpath point to clover.jar(WEB-INF\lib\clover.jar).

Then re-run server.

This widget could not be displayed.

See also this KB article.

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