How to avoid the error “javax.servlet-api-3.0.1.jar - jar not loaded”?

grails, maven, maven-2, maven-3, tomcat7

Solution

You simply have to use a provided scope for your dependency like the following:

<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.0.1</version>
  <scope>provided</scope>
</dependency>

So it will not packaged in your WAR/EAR file anymore.

Problem

I am using Windows 7, Java 1.7, Grails 2.1.4, Groovy 2.0.4 and Tomcat 7.0.37. When executing my project, I get the error below: ``` Apr 5, 2013 11:08:00 AM org.apache.catalina.loader.WebappClassLoader validateJarFile INFO: validateJarFile(/software/apache-tomcat-7.0.37/webapps/aaaportal-0.1/WEB-INF/lib/javax.servlet-api-3.0.1.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class Apr 5, 2013 11:08:13 AM org.apache.catalina.loader.WebappClassLoader loadClass INFO: Illegal access: this web application instance has been stopped already. Could not load org.bouncycastle.jce.provider.JDKKeyPairGenerator$RSABeanInfo. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact. java.lang.IllegalStateException at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1599) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1558) at java.beans.Introspector.instantiate(Introspector.java:1444) at java.beans.Introspector.findExplicitBeanInfo(Introspector.java:428) at java.beans.Introspector.<init>(Introspector.java:377) at java.beans.Introspector.getBeanInfo(Introspector.java:164) at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:2948) ``` I tried different versions of servlet-api and bcprov-ext-jdk15-*.jar, but that didn't help. Should I be worried about this error? How can I get it to disappear?

Original source