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When I click Community Types from the Confluene Administration page, I receive a system error. I'm running Confluence 3.1 and Community Bubbles 1.6m4 (though I also got the error when running 1.5.

Basically, I can't get the plugin to work at all...no forums, nothing. It's very frustrating.

Here is the error I see:

Cause

org.apache.velocity.exception.MethodInvocationException: Invocation of method 'communityTypeInUse' in class com.adaptavist.confluence.bubbles.communities.CommunityTypesAction threw exception com.thoughtworks.xstream.converters.ConversionException: Invalid final field java.util.Collections$SynchronizedMap.m ---- Debugging information ---- message : Invalid final field java.util.Collections$SynchronizedMap.m line number : 4 path : /java.util.Collections-SynchronizedMap/java.util.Collections-SynchronizedMap/default/m cause-message : Invalid final field java.util.Collections$SynchronizedMap.m class : java.util.Collections$SynchronizedMap cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException required-type : java.util.Collections$SynchronizedMap ------------------------------- at /templates/bubbles/communities/list.vm[line 54, column 46]
    at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:337)

caused by: com.thoughtworks.xstream.converters.ConversionException: Invalid final field java.util.Collections$SynchronizedMap.m ---- Debugging information ---- message : Invalid final field java.util.Collections$SynchronizedMap.m line number : 4 path : /java.util.Collections-SynchronizedMap/java.util.Collections-SynchronizedMap/default/m cause-message : Invalid final field java.util.Collections$SynchronizedMap.m class : java.util.Collections$SynchronizedMap cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException required-type : java.util.Collections$SynchronizedMap -------------------------------
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:45)

caused by: com.thoughtworks.xstream.converters.reflection.ObjectAccessException: Invalid final field java.util.Collections$SynchronizedMap.m
    at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.validateFieldAccess(PureJavaReflectionProvider.java:150)
Stack Trace:[hide]

org.apache.velocity.exception.MethodInvocationException: Invocation of method 'communityTypeInUse' in  class com.adaptavist.confluence.bubbles.communities.CommunityTypesAction threw exception com.thoughtworks.xstream.converters.ConversionException: Invalid final field java.util.Collections$SynchronizedMap.m
---- Debugging information ----
message             : Invalid final field java.util.Collections$SynchronizedMap.m 
line number         : 4 
path                : /java.util.Collections-SynchronizedMap/java.util.Collections-SynchronizedMap/default/m 
cause-message       : Invalid final field java.util.Collections$SynchronizedMap.m 
class               : java.util.Collections$SynchronizedMap 
cause-exception     : com.thoughtworks.xstream.converters.reflection.ObjectAccessException 
required-type       : java.util.Collections$SynchronizedMap 
------------------------------- at /templates/bubbles/communities/list.vm[line 54, column 46]
	at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:337)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:284)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:252)
	at org.apache.velocity.runtime.parser.node.ASTReference.evaluate(ASTReference.java:460)
	at org.apache.velocity.runtime.parser.node.ASTNotNode.evaluate(ASTNotNode.java:63)
	at org.apache.velocity.runtime.parser.node.ASTExpression.evaluate(ASTExpression.java:62)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:85)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:364)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)
	at org.apache.velocity.Template.merge(Template.java:328)
	at org.apache.velocity.Template.merge(Template.java:235)
	at com.opensymphony.webwork.dispatcher.VelocityResult.doExecute(VelocityResult.java:91)
	at com.atlassian.xwork.results.ProfiledVelocityResult.doExecute(ProfiledVelocityResult.java:21)
	at com.opensymphony.webwork.dispatcher.WebWorkResultSupport.execute(WebWorkResultSupport.java:116)
	at com.opensymphony.xwork.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:263)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:187)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.util.LoggingContextInterceptor.intercept(LoggingContextInterceptor.java:49)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.core.CancellingInterceptor.intercept(CancellingInterceptor.java:23)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.security.actions.PermissionCheckInterceptor.intercept(PermissionCheckInterceptor.java:57)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.setup.webwork.BootstrapAwareInterceptor.intercept(BootstrapAwareInterceptor.java:26)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.user.actions.UserAwareInterceptor.intercept(UserAwareInterceptor.java:58)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.pages.actions.CommentAwareInterceptor.intercept(CommentAwareInterceptor.java:44)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.pages.actions.PageAwareInterceptor.intercept(PageAwareInterceptor.java:110)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.spaces.actions.SpaceAwareInterceptor.intercept(SpaceAwareInterceptor.java:68)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.core.actions.LastModifiedInterceptor.intercept(LastModifiedInterceptor.java:38)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.core.ConfluenceAutowireInterceptor.intercept(ConfluenceAutowireInterceptor.java:38)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.xwork.interceptors.TransactionalInvocation.invokeAndHandleExceptions(TransactionalInvocation.java:72)
	at com.atlassian.xwork.interceptors.TransactionalInvocation.invokeInTransaction(TransactionalInvocation.java:59)
	at com.atlassian.xwork.interceptors.XWorkTransactionInterceptor.intercept(XWorkTransactionInterceptor.java:56)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.xwork.SetupIncompleteInterceptor.intercept(SetupIncompleteInterceptor.java:40)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:115)
	at com.atlassian.confluence.servlet.ConfluenceServletDispatcher.serviceAction(ConfluenceServletDispatcher.java:53)
	at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:199)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:55)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
	at com.atlassian.confluence.util.profiling.ProfilingPageFilter.parsePage(ProfilingPageFilter.java:84)
	at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:54)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:55)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.confluence.jmx.JmxFilter.doFilter(JmxFilter.java:106)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.core.filters.ServletContextThreadLocalFilter.doFilter(ServletContextThreadLocalFilter.java:19)
	at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.confluence.util.LoggingContextFilter.doFilter(LoggingContextFilter.java:47)
	at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.confluence.web.filter.ThreadLocalCacheFilter.doFilter(ThreadLocalCacheFilter.java:22)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.confluence.util.UserThreadLocalFilter.doFilter(UserThreadLocalFilter.java:44)
	at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:206)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.security.auth.trustedapps.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:98)
	at com.atlassian.confluence.util.AbstractBootstrapHotSwappingFilter.doFilter(AbstractBootstrapHotSwappingFilter.java:30)
	at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:131)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
	at com.atlassian.oauth.serviceprovider.internal.servlet.OAuthFilter.doFilter(OAuthFilter.java:69)
	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)
	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:55)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.confluence.util.ClusterHeaderFilter.doFilter(ClusterHeaderFilter.java:35)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.johnson.filters.AbstractJohnsonFilter.doFilter(AbstractJohnsonFilter.java:72)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:170)
	at com.atlassian.spring.filter.FlushingSpringSessionInViewFilter.doFilterInternal(FlushingSpringSessionInViewFilter.java:29)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.confluence.util.ConfluenceErrorFilter.doFilter(ConfluenceErrorFilter.java:22)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:99)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.confluence.core.datetime.RequestTimeThreadLocalFilter.doFilter(RequestTimeThreadLocalFilter.java:34)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.confluence.util.RequestCacheThreadLocalFilter.doFilter(RequestCacheThreadLocalFilter.java:25)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.gzipfilter.GzipFilter.doFilterInternal(GzipFilter.java:81)
	at com.atlassian.gzipfilter.GzipFilter.doFilter(GzipFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.core.filters.cache.AbstractCachingFilter.doFilter(AbstractCachingFilter.java:33)
	at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
	at com.atlassian.confluence.extra.webdav.servlet.filter.ReverseProxyFilter.doFilter(ReverseProxyFilter.java:427)
	at com.atlassian.confluence.extra.webdav.servlet.filter.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:34)
	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)
	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:55)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:41)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.core.filters.encoding.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:41)
	at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.atlassian.core.filters.HeaderSanitisingFilter.doFilter(HeaderSanitisingFilter.java:44)
	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:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	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:263)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)
Caused by: com.thoughtworks.xstream.converters.ConversionException: Invalid final field java.util.Collections$SynchronizedMap.m
---- Debugging information ----
message             : Invalid final field java.util.Collections$SynchronizedMap.m 
line number         : 4 
path                : /java.util.Collections-SynchronizedMap/java.util.Collections-SynchronizedMap/default/m 
cause-message       : Invalid final field java.util.Collections$SynchronizedMap.m 
class               : java.util.Collections$SynchronizedMap 
cause-exception     : com.thoughtworks.xstream.converters.reflection.ObjectAccessException 
required-type       : java.util.Collections$SynchronizedMap 
-------------------------------
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:45)
	at com.thoughtworks.xstream.core.ReferenceByXPathUnmarshaller.convertAnother(ReferenceByXPathUnmarshaller.java:39)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:99)
	at com.thoughtworks.xstream.core.ReferenceByXPathMarshallingStrategy.unmarshal(ReferenceByXPathMarshallingStrategy.java:12)
	at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:549)
	at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:537)
	at com.thoughtworks.xstream.XStream.fromXML(XStream.java:505)
	at com.thoughtworks.xstream.XStream.fromXML(XStream.java:496)
	at com.adaptavist.confluence.bubbles.communities.CommunityManager.loadMap(CommunityManager.java:308)
	at com.adaptavist.confluence.bubbles.communities.CommunityManager.initData(CommunityManager.java:261)
	at com.adaptavist.confluence.bubbles.communities.CommunityManager.getCommunitySpaces(CommunityManager.java:364)
	at com.adaptavist.confluence.bubbles.communities.CommunityTypesAction.communityTypeInUse(CommunityTypesAction.java:206)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:389)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:378)
	at com.atlassian.confluence.velocity.introspection.UnboxingMethod.invoke(UnboxingMethod.java:31)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:270)
	... 173 more
Caused by: com.thoughtworks.xstream.converters.reflection.ObjectAccessException: Invalid final field java.util.Collections$SynchronizedMap.m
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.validateFieldAccess(PureJavaReflectionProvider.java:150)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.writeField(PureJavaReflectionProvider.java:120)
	at com.thoughtworks.xstream.converters.reflection.SerializableConverter$2.defaultReadObject(SerializableConverter.java:331)
	at com.thoughtworks.xstream.converters.reflection.SerializableConverter.unmarshal(SerializableConverter.java:363)
	at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:38)
	... 192 more

        

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operatingSystem: FreeBSD 7.0-RELEASE-p6
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javaVm: Diablo Java HotSpot(TM) Client VM
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tempDirectory: /pack/confluence/temp
date: Monday, 28 Dec 2009
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workingDirectory: /service/confluence
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    * Adaptavist Community Bubbles (com.adaptavist.confluence.bubbles, Version: 1.6-m4, Installed: Dec 28, 2009)
    * Adaptavist Content Formatting Macros (com.adaptavist.confluence.contentFormattingMacros, Version: 1.6.12, Installed: Dec 28, 2009)
    * Add Content Menu Sections (confluence.menu.add, Version: 1.0, Installed: bundled)
    * Admin Sections (confluence.sections.admin, Version: 1.0, Installed: bundled)
    * Advanced Macros (confluence.macros.advanced, Version: 1.6.8, Installed: Mar 31, 2009)
    * Apache HttpClient OSGi bundle (org.apache.httpcomponents.httpclient-4.0, Version: 4.0, Installed: bundled)
    * Apache HttpCore OSGi bundle (org.apache.httpcomponents.httpcore-4.0, Version: 4.0, Installed: bundled)
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Request
Information

URL
    https://docs.saxotech.com/500page.jsp 
URI
    /500page.jsp 
Context Path
Servlet Path
    /500page.jsp

Headers (Limited subset)

host
    docs.saxotech.com
user-agent
    Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6
keep-alive
    300
connection
    keep-alive

Attributes

javax.servlet.forward.request_uri
    /admin/bubbles/communities.action
javax.servlet.forward.context_path
javax.servlet.forward.servlet_path
    /admin/bubbles/communities.action
javax.servlet.forward.path_info
    /500page.jsp
os_securityfilter_already_filtered
    true
javax.servlet.jsp.jspException
    org.apache.velocity.exception.MethodInvocationException: Invocation of method 'communityTypeInUse' in class com.adaptavist.confluence.bubbles.communities.CommunityTypesAction threw exception com.thoughtworks.xstream.converters.ConversionException: Invalid final field java.util.Collections$SynchronizedMap.m ---- Debugging information ---- message : Invalid final field java.util.Collections$SynchronizedMap.m line number : 4 path : /java.util.Collections-SynchronizedMap/java.util.Collections-SynchronizedMap/default/m cause-message : Invalid final field java.util.Collections$SynchronizedMap.m class : java.util.Collections$SynchronizedMap cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException required-type : java.util.Collections$SynchronizedMap ------------------------------- at /templates/bubbles/communities/list.vm[line 54, column 46]
atlassian.core.seraph.original.url
    /admin/bubbles/communities.action
javax.servlet.error.status_code
    500
javax.servlet.error.servlet_name
    action
__sitemesh__using_stream
    false
com.atlassian.gzipfilter.GzipFilter_already_filtered
    true
loginfilter.already.filtered
    true
com.atlassian.confluence.web.ConfluenceJohnsonFilter_already_filtered
    true
Confluence-Request-Time
    1262007927510
javax.servlet.error.message
com.adaptavist.confluence.bubbles.customcss.action
    true
com.adaptavist.confluence.bubbles.customcss.general.included
    true
com.atlassian.core.filters.HeaderSanitisingFilter_already_filtered
    true
webwork.valueStack
    com.opensymphony.xwork.util.OgnlValueStack@1f7f182
sessioninview.FILTERED
    true
__sitemesh__filterapplied
    true
javax.servlet.error.exception
    org.apache.velocity.exception.MethodInvocationException: Invocation of method 'communityTypeInUse' in class com.adaptavist.confluence.bubbles.communities.CommunityTypesAction threw exception com.thoughtworks.xstream.converters.ConversionException: Invalid final field java.util.Collections$SynchronizedMap.m ---- Debugging information ---- message : Invalid final field java.util.Collections$SynchronizedMap.m line number : 4 path : /java.util.Collections-SynchronizedMap/java.util.Collections-SynchronizedMap/default/m cause-message : Invalid final field java.util.Collections$SynchronizedMap.m class : java.util.Collections$SynchronizedMap cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException required-type : java.util.Collections$SynchronizedMap ------------------------------- at /templates/bubbles/communities/list.vm[line 54, column 46]
javax.servlet.error.request_uri
    /admin/bubbles/communities.action

Parameters (Limited subset)

Confluence User

epohl
Logging:

2 log statements generated by this request:
[ERROR] Mon Dec 28 14:45:27 CET 2009 [com.opensymphony.webwork.dispatcher.VelocityResult] Unable to render Velocity Template, '/templates/bubbles/communities/list.vm'
Throwable:
org.apache.velocity.exception.MethodInvocationException: Invocation of method 'communityTypeInUse' in class com.adaptavist.confluence.bubbles.communities.CommunityTypesAction threw exception com.thoughtworks.xstream.converters.ConversionException: Invalid final field java.util.Collections$SynchronizedMap.m
---- Debugging information ----
message : Invalid final field java.util.Collections$SynchronizedMap.m
line number : 4
path : /java.util.Collections-SynchronizedMap/java.util.Collections-SynchronizedMap/default/m
cause-message : Invalid final field java.util.Collections$SynchronizedMap.m
class : java.util.Collections$SynchronizedMap
cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException
required-type : java.util.Collections$SynchronizedMap
------------------------------- at /templates/bubbles/communities/list.vm[line 54, column 46]
at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:337)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:284)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:252)
at org.apache.velocity.runtime.parser.node.ASTReference.evaluate(ASTReference.java:460)
at org.apache.velocity.runtime.parser.node.ASTNotNode.evaluate(ASTNotNode.java:63)
at org.apache.velocity.runtime.parser.node.ASTExpression.evaluate(ASTExpression.java:62)
at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:85)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:364)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)
[ERROR] Mon Dec 28 14:45:27 CET 2009 [com.atlassian.confluence.servlet.ConfluenceServletDispatcher] Could not execute action
Throwable:
org.apache.velocity.exception.MethodInvocationException: Invocation of method 'communityTypeInUse' in class com.adaptavist.confluence.bubbles.communities.CommunityTypesAction threw exception com.thoughtworks.xstream.converters.ConversionException: Invalid final field java.util.Collections$SynchronizedMap.m
---- Debugging information ----
message : Invalid final field java.util.Collections$SynchronizedMap.m
line number : 4
path : /java.util.Collections-SynchronizedMap/java.util.Collections-SynchronizedMap/default/m
cause-message : Invalid final field java.util.Collections$SynchronizedMap.m
class : java.util.Collections$SynchronizedMap
cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException
required-type : java.util.Collections$SynchronizedMap
------------------------------- at /templates/bubbles/communities/list.vm[line 54, column 46]
at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:337)
at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:284)
at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:252)
at org.apache.velocity.runtime.parser.node.ASTReference.evaluate(ASTReference.java:460)
at org.apache.velocity.runtime.parser.node.ASTNotNode.evaluate(ASTNotNode.java:63)
at org.apache.velocity.runtime.parser.node.ASTExpression.evaluate(ASTExpression.java:62)
at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:85)
at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:364)
at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)
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