Apache Tomcat errors

HTTP Status 500 - java.lang.ClassNotFoundException: org.apache.jsp.index_jsp

type Exception report

message java.lang.ClassNotFoundException: org.apache.jsp.index_jsp

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
	org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:176)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
	java.net.URLClassLoader$1.run(URLClassLoader.java:370)
	java.net.URLClassLoader$1.run(URLClassLoader.java:362)
	java.security.AccessController.doPrivileged(Native Method)
	java.net.URLClassLoader.findClass(URLClassLoader.java:361)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:131)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:62)
	org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:171)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

java.io.FileNotFoundException: /opt/tomcat/apache-tomcat-8.0.35/work/Catalina/localhost/ROOT/org/apache/jsp/index_jsp.class (Permission denied)
	java.io.FileInputStream.open0(Native Method)
	java.io.FileInputStream.open(FileInputStream.java:195)
	java.io.FileInputStream.<init>(FileInputStream.java:138)
	sun.misc.URLClassPath$FileLoader$1.getInputStream(URLClassPath.java:1251)
	sun.misc.Resource.cachedInputStream(Resource.java:77)
	sun.misc.Resource.getByteBuffer(Resource.java:160)
	java.net.URLClassLoader.defineClass(URLClassLoader.java:454)
	java.net.URLClassLoader.access$100(URLClassLoader.java:73)
	java.net.URLClassLoader$1.run(URLClassLoader.java:368)
	java.net.URLClassLoader$1.run(URLClassLoader.java:362)
	java.security.AccessController.doPrivileged(Native Method)
	java.net.URLClassLoader.findClass(URLClassLoader.java:361)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:131)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:62)
	org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:171)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.35 logs.

Apache Tomcat/8.0.35