"The server encountered an internal error (Internal Server Error) that
prevented it from fulfilling this request.
java.lang.IllegalStateException
at org.apache.catalina.connector.HttpResponseFacade.sendRedirect(Unknown
Source)
at VerifyAccount.doGet(VerifyAccount.java:86)
at VerifyAccount.doPost(VerifyAccount.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown
Source)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown
Source)
at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown
Source)
at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
Source)
at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
at org.apache.catalina.core.StandardContextValve.invoke(Unknown
Source)
at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
Source)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Unknown
Source)
at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
Source)
at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
at org.apache.catalina.core.StandardContext.invoke(Unknown Source)
at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source)
at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
Source)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(Unknown
Source)
at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
Source)
at org.apache.catalina.valves.ErrorReportValve.invoke(Unknown Source)
at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
Source)
at org.apache.catalina.valves.AccessLogValve.invoke(Unknown Source)
at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
Source)
at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
at org.apache.catalina.core.StandardEngineValve.invoke(Unknown
Source)
at org.apache.catalina.core.StandardPipeline.invokeNext(Unknown
Source)
at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source)
at org.apache.catalina.core.ContainerBase.invoke(Unknown Source)
at org.apache.catalina.connector.http.HttpProcessor.process(Unknown
Source)
at org.apache.catalina.connector.http.HttpProcessor.run(Unknown
Source)
at java.lang.Thread.run(Thread.java:484)"
I don't know how to correct it. Please help me!