The following (harmless?) stacktrace shows when first shelving/unshelving a project. It might be a bug in core.

Nov 9, 2010 9:09:21 PM hudson.ExpressionFactory2$JexlExpression evaluate

WARNING: Caught exception evaluating: e.hasStopPermission(). Reason: java.lang.NullPointerException

java.lang.NullPointerException

at hudson.model.Executor.hasStopPermission(Executor.java:368)

at sun.reflect.GeneratedMethodAccessor160.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at org.apache.commons.jexl.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:258)

at org.apache.commons.jexl.parser.ASTMethod.execute(ASTMethod.java:104)

at org.apache.commons.jexl.parser.ASTReference.execute(ASTReference.java:83)

at org.apache.commons.jexl.parser.ASTReference.value(ASTReference.java:57)

at org.apache.commons.jexl.parser.ASTReferenceExpression.value(ASTReferenceExpression.java:51)

at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:80)

at hudson.ExpressionFactory2$JexlExpression.evaluate(ExpressionFactory2.java:72)

at org.apache.commons.jelly.expression.ExpressionSupport.evaluateRecurse(ExpressionSupport.java:61)

at org.apache.commons.jelly.expression.ExpressionSupport.evaluateAsBoolean(ExpressionSupport.java:71)

at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:97)

at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)

at org.apache.commons.jelly.tags.core.OtherwiseTag.doTag(OtherwiseTag.java:41)

at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)

at org.apache.commons.jelly.tags.core.ChooseTag.doTag(ChooseTag.java:38)

at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)

at org.apache.commons.jelly.impl.DynamicTag.doTag(DynamicTag.java:81)

at org.apache.commons.jelly.impl.StaticTagScript.run(StaticTagScript.java:121)

at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)

at org.apache.commons.jelly.tags.core.ForEachTag.doTag(ForEachTag.java:150)

at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)

at org.apache.commons.jelly.tags.core.ForEachTag.doTag(ForEachTag.java:150)

at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:98)

at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)

at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)

at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)

at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:98)

at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)

at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)

at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)

at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)

at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)

at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:63)

at org.kohsuke.stapler.jelly.IncludeTag.doTag(IncludeTag.java:146)

at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:98)

at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)

at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)

at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)

at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)

at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)

at org.kohsuke.stapler.jelly.CompressTag.doTag(CompressTag.java:44)

at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)

at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:63)

at org.kohsuke.stapler.jelly.DefaultScriptInvoker.invokeScript(DefaultScriptInvoker.java:63)

at org.kohsuke.stapler.jelly.DefaultScriptInvoker.invokeScript(DefaultScriptInvoker.java:53)

at org.kohsuke.stapler.jelly.JellyClassTearOff.serveIndexJelly(JellyClassTearOff.java:72)

at org.kohsuke.stapler.jelly.JellyFacet.handleIndexRequest(JellyFacet.java:114)

at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:551)

at org.kohsuke.stapler.Stapler.invoke(Stapler.java:640)

at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:606)

at org.kohsuke.stapler.Stapler.invoke(Stapler.java:640)

at org.kohsuke.stapler.Stapler.invoke(Stapler.java:478)

at org.kohsuke.stapler.Stapler.service(Stapler.java:160)

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 hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)

at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:436)

at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:414)

at org.jvnet.hudson.plugins.monitoring.HudsonMonitoringFilter.doFilter(HudsonMonitoringFilter.java:43)

at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:97)

at hudson.plugins.audit_trail.AuditTrailFilter.doFilter(AuditTrailFilter.java:64)

at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:97)

at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)

at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)

at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)

at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTra

nslationFilter.java:166)

at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.

java:87)

at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFil

ter(AnonymousProcessingFilter.java:125)

at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.

java:87)

at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(R

ememberMeProcessingFilter.java:142)

at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.

java:87)

at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProces

singFilter.java:271)

at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.

java:87)

at org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicPr

ocessingFilter.java:173)

at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.

java:87)

at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilte

r(HttpSessionContextIntegrationFilter.java:249)

at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSes

sionContextIntegrationFilter2.java:66)

at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.

java:87)

at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.ja

va:76)

at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl

icationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF

ilterChain.java:206)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV

alve.java:233)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV

alve.java:191)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica

torBase.java:470)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j

ava:127)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j

ava:102)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal

ve.java:109)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav

a:298)

at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java

:857)

at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce

ss(Http11Protocol.java:588)

at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:48

9)

at java.lang.Thread.run(Thread.java:619)