Error: java.util.ConcurrentModificationException
URI: /
Status code: 500
Stack trace:

java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966)

java.util.LinkedList$ListItr.next(LinkedList.java:888)

org.apache.taglibs.standard.tag.common.core.ForEachSupport$SimpleForEachIterator.next(ForEachSupport.java:153)

org.apache.taglibs.standard.tag.common.core.ForEachSupport.next(ForEachSupport.java:175)

javax.servlet.jsp.jstl.core.LoopTagSupport.doAfterBody(LoopTagSupport.java:330)

org.apache.jsp.WEB_002dINF.views.blog.list_jsp._jspx_meth_c_forEach_2(list_jsp.java:768)

org.apache.jsp.WEB_002dINF.views.blog.list_jsp._jspx_meth_c_if_9(list_jsp.java:732)

org.apache.jsp.WEB_002dINF.views.blog.list_jsp._jspx_meth_c_forEach_1(list_jsp.java:644)

org.apache.jsp.WEB_002dINF.views.blog.list_jsp._jspService(list_jsp.java:137)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)

javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)

javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)

org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:875)

org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:739)

org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:695)

org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:626)

org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:977)

org.apache.jsp.WEB_002dINF.views.index_jsp._jspx_meth_c_if_1(index_jsp.java:254)

org.apache.jsp.WEB_002dINF.views.index_jsp._jspx_meth_c_forEach_0(index_jsp.java:131)

org.apache.jsp.WEB_002dINF.views.index_jsp._jspService(index_jsp.java:72)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)

javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)

javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)

org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:875)

org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:739)

org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:695)

org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:626)

org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:977)

org.apache.jsp.WEB_002dINF.views.layout_jsp._jspService(layout_jsp.java:175)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)

javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)

javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)

org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:875)

org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:739)

org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:575)

org.apache.catalina.core.ApplicationDispatcher.doDispatch(ApplicationDispatcher.java:546)

org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:428)

org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:378)

org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)

org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)

org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1201)

org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:986)

org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:933)

org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:851)

org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)

org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)

javax.servlet.http.HttpServlet.service(HttpServlet.java:687)

org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)

javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:344)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)

org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)

org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:139)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)

org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)

org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)

org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)

org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)

org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)

org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)

org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:316)

org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)

org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)

org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)

com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)

org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)

org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415)

org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282)

com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)

com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)

org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)

org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)

org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)

org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)

org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)

org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)

org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)

org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)

org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)

org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)

org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)

org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)

org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)

org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)

org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)

org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)

java.lang.Thread.run(Thread.java:745)