javax.servlet.ServletException：Servlet jsp的Servlet.destroy（）引发异常

Question

From time to time i get this error on Eclipse:

Grave: Servlet jsp threw unload() exception
javax.servlet.ServletException: Servlet.destroy() for servlet jsp threw exception
    at org.apache.catalina.core.StandardWrapper.unload(StandardWrapper.java:1486)
    at org.apache.catalina.core.StandardWrapper.stopInternal(StandardWrapper.java:1823)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5463)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3913)
    at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:426)
    at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1345)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1530)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1540)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1540)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1519)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoSuchFieldError: deferredExpression
    at org.apache.taglibs.standard.tag.common.core.ForEachSupport.release(ForEachSupport.java:178)
    at org.apache.jasper.runtime.TagHandlerPool.release(TagHandlerPool.java:165)
    at org.apache.jsp.Include.Apertura_jsp._jspDestroy(Apertura_jsp.java:45)
    at org.apache.jasper.runtime.HttpJspBase.destroy(HttpJspBase.java:60)
    at org.apache.jasper.servlet.JspServletWrapper.destroy(JspServletWrapper.java:478)
    at org.apache.jasper.compiler.JspRuntimeContext.destroy(JspRuntimeContext.java:317)
    at org.apache.jasper.servlet.JspServlet.destroy(JspServlet.java:354)
    at org.apache.catalina.core.StandardWrapper.unload(StandardWrapper.java:1465)
    ... 12 more

It happens after Ecplise print this on the console window

ago 12, 2014 11:14:40 PM org.apache.catalina.core.StandardContext reload
Informazioni: Reloading Context with name [/Jeans2] has started
ago 12, 2014 11:14:40 PM org.apache.catalina.core.ApplicationContext log

I think it means Eclipse is trying to compile my classe etc. Anyway, my project stopped working after eclipse do it, and i get that error

I found some similar posts, but i didnt find a solution that suits my problem. According to other posts solutions, i did this stuff:

1) I have no jstl jar file in the WEB-INF/lib folder

2) I have no duplicated jar files in my java build path

Does anybody had my same problem?

I found this: The main reason for this error to be thrown at run-time is "that you may have accidentally (indeed purposefully) deleted a field(public or protected) from the class, or interface and recompiled the edited class or interface alone."

Maybe if eclipse stopped re-compiling every 2 minutes my project i wouldn't get this error, right?? I mean, actually i dont have any error in my application, is it right?

Answer 1

This seems to be a problem generated by Eclipse Build Automatically option. Just turn it off by going to Project / Build Automatically and select it to uncheck it. After this, you will have to compile your project manually by right clicking on it and select Build Project option.