Charts fail to render under "heavy" loading

[ee.ashley]

With JapserServer 4.5.0, I am experiencing an issue where if I pull a report with a chart multiple times simultaneously (to simulate multiple client requests or to simulate a dashboard with multiple chart reports), often times at least one or two of the charts will fail to render (shows a broken image link place holder in my browser) and the following exception appears in the log:

2013-07-18 15:57:05,966 ERROR errorPage_jsp,http-8080-6:259 - JSException: The JasperPrint object 11355625_1374184619754 cannot be found.2013-07-18 15:57:05,967 ERROR errorPage_jsp,http-8080-6:487 - stack trace of exception that redirected to errorPage.jspcom.jaspersoft.jasperserver.api.JSException: jsexception.jasperprint.not.found    at com.jaspersoft.jasperserver.war.control.ReportImageController.handleRequest(ReportImageController.java:99)    at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807)    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571)    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:399)    at com.jaspersoft.jasperserver.api.security.IPadSupportFilter.doFilter(IPadSupportFilter.java:67)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at com.jaspersoft.jasperserver.api.security.JSSwitchUserProcessingFilter.doFilterHttp(JSSwitchUserProcessingFilter.java:154)    at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109)    at org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101)    at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at org.springframework.security.providers.anonymous.AnonymousProcessingFilter.doFilterHttp(AnonymousProcessingFilter.java:105)    at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at com.jaspersoft.jasperserver.api.metadata.user.service.impl.MetadataAuthenticationProcessingFilter.doFilter(MetadataAuthenticationProcessingFilter.java:139)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at com.jaspersoft.jasperserver.war.util.RequestParameterAuthenticationFilter.doFilter(RequestParameterAuthenticationFilter.java:97)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at org.springframework.security.ui.basicauth.BasicProcessingFilter.doFilterHttp(BasicProcessingFilter.java:174)    at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at com.jaspersoft.jasperserver.war.UserPreferencesFilter.doFilter(UserPreferencesFilter.java:184)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at org.springframework.security.ui.AbstractProcessingFilter.doFilterHttp(AbstractProcessingFilter.java:278)    at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at com.jaspersoft.jasperserver.war.UserPreferencesFilter.doFilter(UserPreferencesFilter.java:184)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at com.jaspersoft.jasperserver.api.logging.filter.BasicLoggingFilter.doFilter(BasicLoggingFilter.java:53)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at com.jaspersoft.jasperserver.api.security.JSCsrfGuardFilter.doFilter(JSCsrfGuardFilter.java:81)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at com.jaspersoft.jasperserver.api.security.WebAppSecurityFilter.doFilter(WebAppSecurityFilter.java:83)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at com.jaspersoft.jasperserver.war.MultipartRequestWrapperFilter.doFilter(MultipartRequestWrapperFilter.java:90)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at org.springframework.security.context.HttpSessionContextIntegrationFilter.doFilterHttp(HttpSessionContextIntegrationFilter.java:235)    at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)    at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:411)    at org.springframework.security.util.FilterChainProxy.doFilter(FilterChainProxy.java:188)    at org.springframework.security.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:99)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at com.jaspersoft.jasperserver.war.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:67)    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:236)    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:558)    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)    at java.lang.Thread.run(Thread.java:619)[/code]

When I searched for this error online, it seemed that people were getting this error when using Google Chrome, but they apparently did not experience any other adverse effects for the reports. I tried this under both Chrome and IE8, and the result is the same.

We are experiencing this in a third-party product that has Jasperserver Pro 4.5.0 integrated into it, but I am am reproducing this in stock Jasperserver CP 4.5.0 as well (trying to isolate if its the third-party product or Jasperserver itself causing the issue). I am running this under a Windows Server 2008 R2 virtual machine.

I've attached the jrxml file for the report, which was created with iReport Designer.

Any ideas are greatly appreciated!

[ee.ashley]

I've traced through the Java code and found that there is a hashmap in the session that appears to store references to the images that need to be generated. This hashmap appears to have a max size of 10. If I increased this size in the debugger to a larger number (exceeding the number of charts I try to generate concurrently), then I could get all charts to render without issue. Otherwise, any more than 10 charts resulted in the exceptions being thrown.

I saw that this class has a setMaxSize method in the LRUSessionObjectAccessor.java file, but even when I set a breakpoint on this, it never seemed to be called. I also grepped through the Java source files themselves and could not find any calls to setMaxSize either.

Does anyone know where the limit of 10 gets set? And is there a way to increase this without necessitating a code change?

EDIT:

I found that the applicationContext.xml settings file has a maxSize property, which has a comment regarding dashboard image loading problems. I tested updating this setting to a larger number in the community edition and found that it addressed my chart loading issues. I am trying to get this change tested in our production JasperServer Pro installation to see if it helps as well.