Subudh,
On 3/21/24 07:32, Subodh Joshi wrote:
Expert,
Recently i came across a issue and i was getting no clue what was going on
wrong with the Application.
So here is the issue , we were getting following issue in our web
application(Springboot+Embedded Tomcat) which is deployed into Linux machine
java.lang.ClassNotFoundException:
org.apache.jsp.WEB_002dINF.jsp.ImportTab_jsp
at
java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:445)
at
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:129)
at
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:58)
at
org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:151)
at
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:189)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:410)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380)
at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:110)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
at
org.springframework.web.filter.CompositeFilter$VirtualFilterChain.doFilter(CompositeFilter.java:108)
at
org.springframework.security.web.FilterChainProxy.lambda$doFilterInternal$3(FilterChainProxy.java:231)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:365)
at
org.springframework.security.web.access.intercept.AuthorizationFilter.doFilter(AuthorizationFilter.java:100)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
at
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:126)
at
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:120)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
at
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
at
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:179)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
at
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
at
com.comptel.catalog.support.filter.OperationClientRestFilter.doFilter(OperationClientRestFilter.java:86)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
at
com.comptel.catalog.support.filter.JwtSecurityChainFilter.doFilter(JwtSecurityChainFilter.java:100)
at
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:374)
but how to reproduce this issue we were not able to get any clue.
But Recently i got to know how to reproduce this issue
1- Start the web-application.
2- Tomcat will create a directory under /tmp/tomcat.*/.././......
3- Now access web-application through browser.
4- But dont access all JSP pages.
5- Suppose application have A,B,C,D.jsp pages .
6- User accesses A,B.jsp only
7- Now user or any cron job deleted /tmp/tomcat directory
Don't do that.
8- Now user click on C.jsp it is throwing above given exception.
9- Now click on D.jsp it will work fine as tomcat will create /tmp/tomcat
..... directory again.
10. But C.jsp which was failed with 500 error will never come upto the time
tomcat will not start.
Can someone please explain how tomcat works here and why it throws an
exception and wont allow that jsp page to come up without restart?
Tomcat is caching resources and does not expect another process to come
around and delete its files. I'm not sure exactly why the C.jsp/C.class
file ends up getting "stuck" while D.jsp/D.class does not.
You vould try setting cachingAllowed="false" in your <Resources> element
in META-INF/context.xml (or embedded equivalent) to disable caching.
Performance will likely suffer, but perhaps it will reolve this issue.
Why not just _stop deleting Tomcat's work directory_?
-chris
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