- 
    
Bug
 - 
    Resolution: Fixed
 - 
    
Minor
 - 
    None
 
Whenever I hit the save button, even if nothing was changed I get a IllegalArgumentException such as this:
javax.servlet.ServletException: java.lang.IllegalArgumentException: Failed to instantiate class hudson.plugins.checkstyle.CheckStyleReporter from {"canComputeNew":
{"failedNewAll":"","failedNewHigh":"","failedNewLow":"","failedNewNormal":"","unstableNewAll":"","unstableNewHigh":"","unstableNewLow":"","unstableNewNormal":"","useDeltaValues":false},"canRunOnFailed":false,"failedTotalAll":"","failedTotalHigh":"","failedTotalLow":"","failedTotalNormal":"","healthy":"","thresholdLimit":"low","unHealthy":"","unstableTotalAll":"","unstableTotalHigh":"","unstableTotalLow":"","unstableTotalNormal":""}
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:603)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:234)
	org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:561)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:477)
	org.kohsuke.stapler.Stapler.service(Stapler.java:159)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)
	hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)
	hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
	hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
	hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:66)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
	hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
	hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
root cause
java.lang.IllegalArgumentException: Failed to instantiate class hudson.plugins.checkstyle.CheckStyleReporter from {"canComputeNew":
{"failedNewAll":"","failedNewHigh":"","failedNewLow":"","failedNewNormal":"","unstableNewAll":"","unstableNewHigh":"","unstableNewLow":"","unstableNewNormal":"","useDeltaValues":false},"canRunOnFailed":false,"failedTotalAll":"","failedTotalHigh":"","failedTotalLow":"","failedTotalNormal":"","healthy":"","thresholdLimit":"low","unHealthy":"","unstableTotalAll":"","unstableTotalHigh":"","unstableTotalLow":"","unstableTotalNormal":""}
	org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:628)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:372)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:368)
	hudson.plugins.checkstyle.CheckStyleReporterDescriptor.newInstance(CheckStyleReporterDescriptor.java:28)
	hudson.plugins.checkstyle.CheckStyleReporterDescriptor.newInstance(CheckStyleReporterDescriptor.java:16)
	hudson.util.DescribableList.rebuild(DescribableList.java:155)
	hudson.maven.MavenModuleSet.submit(MavenModuleSet.java:840)
	hudson.model.Job.doConfigSubmit(Job.java:965)
	hudson.model.AbstractProject.doConfigSubmit(AbstractProject.java:643)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:597)
	org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:282)
	org.kohsuke.stapler.Function.bindAndInvoke(Function.java:149)
	org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:88)
	org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:104)
	org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:561)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:234)
	org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:561)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:477)
	org.kohsuke.stapler.Stapler.service(Stapler.java:159)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)
	hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)
	hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
	hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
	hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:66)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
	hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
	hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
root cause
java.lang.IllegalArgumentException: Failed to convert the canComputeNew parameter of the constructor public hudson.plugins.checkstyle.CheckStyleReporter(java.lang.String,java.lang.String,java.lang.String,boolean,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,boolean,boolean)
	org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:622)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:372)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:368)
	hudson.plugins.checkstyle.CheckStyleReporterDescriptor.newInstance(CheckStyleReporterDescriptor.java:28)
	hudson.plugins.checkstyle.CheckStyleReporterDescriptor.newInstance(CheckStyleReporterDescriptor.java:16)
	hudson.util.DescribableList.rebuild(DescribableList.java:155)
	hudson.maven.MavenModuleSet.submit(MavenModuleSet.java:840)
	hudson.model.Job.doConfigSubmit(Job.java:965)
	hudson.model.AbstractProject.doConfigSubmit(AbstractProject.java:643)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:597)
	org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:282)
	org.kohsuke.stapler.Function.bindAndInvoke(Function.java:149)
	org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:88)
	org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:104)
	org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:561)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:234)
	org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:561)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:477)
	org.kohsuke.stapler.Stapler.service(Stapler.java:159)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)
	hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)
	hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
	hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
	hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:66)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
	hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
	hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
root cause
java.lang.IllegalArgumentException: Failed to instantiate boolean from
{"failedNewAll":"","failedNewHigh":"","failedNewLow":"","failedNewNormal":"","unstableNewAll":"","unstableNewHigh":"","unstableNewLow":"","unstableNewNormal":"","useDeltaValues":false}	org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:628)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:372)
	org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:620)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:372)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:368)
	hudson.plugins.checkstyle.CheckStyleReporterDescriptor.newInstance(CheckStyleReporterDescriptor.java:28)
	hudson.plugins.checkstyle.CheckStyleReporterDescriptor.newInstance(CheckStyleReporterDescriptor.java:16)
	hudson.util.DescribableList.rebuild(DescribableList.java:155)
	hudson.maven.MavenModuleSet.submit(MavenModuleSet.java:840)
	hudson.model.Job.doConfigSubmit(Job.java:965)
	hudson.model.AbstractProject.doConfigSubmit(AbstractProject.java:643)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:597)
	org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:282)
	org.kohsuke.stapler.Function.bindAndInvoke(Function.java:149)
	org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:88)
	org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:104)
	org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:561)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:234)
	org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:561)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:477)
	org.kohsuke.stapler.Stapler.service(Stapler.java:159)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)
	hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)
	hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
	hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
	hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:66)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
	hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
	hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
root cause
org.kohsuke.stapler.NoStaplerConstructorException: There's no @DataBoundConstructor on any constructor of boolean
	org.kohsuke.stapler.RequestImpl.loadConstructorParamNames(RequestImpl.java:480)
	org.kohsuke.stapler.RequestImpl.access$100(RequestImpl.java:75)
	org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:607)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:372)
	org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:620)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:372)
	org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:368)
	hudson.plugins.checkstyle.CheckStyleReporterDescriptor.newInstance(CheckStyleReporterDescriptor.java:28)
	hudson.plugins.checkstyle.CheckStyleReporterDescriptor.newInstance(CheckStyleReporterDescriptor.java:16)
	hudson.util.DescribableList.rebuild(DescribableList.java:155)
	hudson.maven.MavenModuleSet.submit(MavenModuleSet.java:840)
	hudson.model.Job.doConfigSubmit(Job.java:965)
	hudson.model.AbstractProject.doConfigSubmit(AbstractProject.java:643)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	java.lang.reflect.Method.invoke(Method.java:597)
	org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:282)
	org.kohsuke.stapler.Function.bindAndInvoke(Function.java:149)
	org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:88)
	org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:104)
	org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:561)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:234)
	org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:561)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:646)
	org.kohsuke.stapler.Stapler.invoke(Stapler.java:477)
	org.kohsuke.stapler.Stapler.service(Stapler.java:159)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)
	hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)
	hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
	hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:166)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:173)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
	hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:66)
	hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
	hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
	hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
	hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
If I disable the checkstyle plugin, pmd fails with a similar stacktrace, when pmd is disabled, dry fails, when that's disabled tasks-plugin fails, and when all the four are disabled it works properly, but all 4 plugins are disabled.
Once this is done I can re-enable them back and will start to work, but for pre-existing projects, all configuration is broken, and the process of fixing it through disabling / re-enabling it deletes all configuration.
- is duplicated by
 - 
                    
JENKINS-12068 Cannot configure projects anymore
-         
 - Resolved
 
 -