Request for Jelly Tag library (custom) support : custom tag library not working after restarting Jenkins

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vinodhi...@gmail.com

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Apr 22, 2015, 4:14:40 AM4/22/15
to jenkin...@googlegroups.com
Hello All,


I have a created a special Build Job. Jenkins > New job > Build Special project > Ok. This creates few other child projects as FreeStyleProject.

I have a  main.jelly file in the src/main/resources/com/myproject/SpecialMainProject . I would like to list down all child projects in the Special Project Page (similar to upstream or downstream list).

I created xmlns:local="local" namespace using upstream-downstream.jelly file as reference.

When I create my special project, I could see all my child projects as below:



The problem now is , when I restart Jenkins, all child jobs looks like show below and I get the below exception:



Exception:


Apr 22, 2015 1:24:28 PM hudson.ExpressionFactory2$JexlExpression evaluate
WARNING: Caught exception evaluating: job.buildStatusUrl in /jenkins/job/Special/. Reason: java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException
    at sun.reflect.GeneratedMethodAccessor208.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.commons.jexl.util.PropertyExecutor.execute(PropertyExecutor.java:125)
    at org.apache.commons.jexl.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:314)
    at org.apache.commons.jexl.parser.ASTArrayAccess.evaluateExpr(ASTArrayAccess.java:185)
    at org.apache.commons.jexl.parser.ASTIdentifier.execute(ASTIdentifier.java:75)
    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:74)
    at org.apache.commons.jelly.expression.ExpressionSupport.evaluateRecurse(ExpressionSupport.java:61)
    at org.apache.commons.jelly.expression.ExpressionSupport.evaluateAsString(ExpressionSupport.java:46)
    at org.apache.commons.jelly.expression.CompositeExpression.evaluateAsString(CompositeExpression.java:256)
    at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.buildAttributes(ReallyStaticTagLibrary.java:111)
    at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:95)
    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.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
    at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
    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:269)
    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$1.run(CoreTagLibrary.java:98)
    at org.apache.commons.jelly.impl.DynamicTag.doTag(DynamicTag.java:81)
    at org.apache.commons.jelly.impl.StaticTagScript.run(StaticTagScript.java:124)
    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:81)
    at org.kohsuke.stapler.jelly.IncludeTag.doTag(IncludeTag.java:146)
    at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
    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:269)
    at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
    at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
    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:269)
    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.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
    at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:81)
    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:112)
    at org.kohsuke.stapler.jelly.JellyFacet.handleIndexRequest(JellyFacet.java:127)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:674)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
    at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:239)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:685)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:587)
    at org.kohsuke.stapler.Stapler.service(Stapler.java:218)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:491)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1074)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:96)
    at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:88)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
    at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
    at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:46)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:185)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:689)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:391)
    at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:146)
    at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
    at org.mortbay.jetty.Server.handle(Server.java:285)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:457)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:751)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:500)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:209)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:357)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:329)
    at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)
Caused by: java.lang.NullPointerException
    at hudson.model.AbstractProject.getLastBuild(AbstractProject.java:1089)
    at hudson.model.AbstractProject.getLastBuild(AbstractProject.java:152)
    at hudson.model.Job.getIconColor(Job.java:989)
    at hudson.model.AbstractProject.getIconColor(AbstractProject.java:735)
    at hudson.model.Job.getBuildStatusUrl(Job.java:1210)
    ... 106 more

Apr 22, 2015 1:24:28 PM hudson.ExpressionFactory2$JexlExpression evaluate
WARNING: Caught exception evaluating: h.getRelativeLinkTo(job) in /jenkins/job/Special/. Reason: java.lang.NullPointerException
java.lang.NullPointerException
    at hudson.model.AbstractItem.getShortUrl(AbstractItem.java:405)
    at hudson.Functions.getRelativeLinkTo(Functions.java:1014)
    at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.commons.jexl.util.introspection.UberspectImpl$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:74)
    at org.apache.commons.jelly.expression.ExpressionSupport.evaluateRecurse(ExpressionSupport.java:61)
    at org.apache.commons.jelly.expression.ExpressionSupport.evaluateAsString(ExpressionSupport.java:46)
    at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.buildAttributes(ReallyStaticTagLibrary.java:111)
    at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:95)
    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.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
    at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
    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:269)
    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$1.run(CoreTagLibrary.java:98)
    at org.apache.commons.jelly.impl.DynamicTag.doTag(DynamicTag.java:81)
    at org.apache.commons.jelly.impl.StaticTagScript.run(StaticTagScript.java:124)
    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:81)
    at org.kohsuke.stapler.jelly.IncludeTag.doTag(IncludeTag.java:146)
    at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
    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:269)
    at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
    at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
    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:269)
    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.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
    at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:81)
    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:112)
    at org.kohsuke.stapler.jelly.JellyFacet.handleIndexRequest(JellyFacet.java:127)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:674)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
    at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:239)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:685)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:587)
    at org.kohsuke.stapler.Stapler.service(Stapler.java:218)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:491)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1074)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:96)
    at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:88)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
    at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
    at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:46)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:185)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:689)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:391)
    at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:146)
    at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
    at org.mortbay.jetty.Server.handle(Server.java:285)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:457)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:751)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:500)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:209)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:357)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:329)
    at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)

Apr 22, 2015 1:24:28 PM hudson.ExpressionFactory2$JexlExpression evaluate
WARNING: Caught exception evaluating: job.fullDisplayName in /jenkins/job/Special/. Reason: java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException
    at sun.reflect.GeneratedMethodAccessor209.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.commons.jexl.util.PropertyExecutor.execute(PropertyExecutor.java:125)
    at org.apache.commons.jexl.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:314)
    at org.apache.commons.jexl.parser.ASTArrayAccess.evaluateExpr(ASTArrayAccess.java:185)
    at org.apache.commons.jexl.parser.ASTIdentifier.execute(ASTIdentifier.java:75)
    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:74)
    at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:58)
    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.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
    at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
    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:269)
    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$1.run(CoreTagLibrary.java:98)
    at org.apache.commons.jelly.impl.DynamicTag.doTag(DynamicTag.java:81)
    at org.apache.commons.jelly.impl.StaticTagScript.run(StaticTagScript.java:124)
    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:81)
    at org.kohsuke.stapler.jelly.IncludeTag.doTag(IncludeTag.java:146)
    at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
    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:269)
    at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
    at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
    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:269)
    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.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
    at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:81)
    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:112)
    at org.kohsuke.stapler.jelly.JellyFacet.handleIndexRequest(JellyFacet.java:127)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:674)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
    at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:239)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:685)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:587)
    at org.kohsuke.stapler.Stapler.service(Stapler.java:218)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:491)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1074)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:96)
    at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:88)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
    at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
    at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:46)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:185)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:689)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:391)
    at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:146)
    at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
    at org.mortbay.jetty.Server.handle(Server.java:285)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:457)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:751)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:500)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:209)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:357)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:329)
    at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)
Caused by: java.lang.NullPointerException
    at hudson.model.AbstractItem.getFullDisplayName(AbstractItem.java:324)
    ... 103 more

Apr 22, 2015 1:24:28 PM hudson.ExpressionFactory2$JexlExpression evaluate
WARNING: Caught exception evaluating:
    h.breakableString(h.escape(value))
 in /jenkins/job/Special/. Reason: java.lang.NullPointerException
java.lang.NullPointerException
    at hudson.Functions.breakableString(Functions.java:1831)
    at sun.reflect.GeneratedMethodAccessor74.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.commons.jexl.util.introspection.UberspectImpl$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:74)
    at org.apache.commons.jelly.impl.ExpressionScript.run(ExpressionScript.java:66)
    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.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.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)
    at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
    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:269)
    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$1.run(CoreTagLibrary.java:98)
    at org.apache.commons.jelly.impl.DynamicTag.doTag(DynamicTag.java:81)
    at org.apache.commons.jelly.impl.StaticTagScript.run(StaticTagScript.java:124)
    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:81)
    at org.kohsuke.stapler.jelly.IncludeTag.doTag(IncludeTag.java:146)
    at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
    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:269)
    at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)
    at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)
    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:269)
    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.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)
    at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:81)
    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:112)
    at org.kohsuke.stapler.jelly.JellyFacet.handleIndexRequest(JellyFacet.java:127)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:674)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
    at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:239)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:685)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:799)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:587)
    at org.kohsuke.stapler.Stapler.service(Stapler.java:218)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:491)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1074)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:96)
    at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:88)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
    at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
    at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:46)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1065)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:185)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:689)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:391)
    at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:146)
    at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
    at org.mortbay.jetty.Server.handle(Server.java:285)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:457)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:751)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:500)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:209)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:357)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:329)
    at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)



main.jelly

<?jelly escape-by-default='true'?>
<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:i="jelly:fmt" xmlns:p="/lib/hudson/project"  xmlns:local="local" >
 <d:taglib uri="local">
 <d:tag name="list">
      <j:if test="${!empty(items)}">
        <h2>${title}</h2>
        <ul style="list-style-type: none;">
          <j:forEach var="item" items="${items}">
          <j:if test="${h.hasPermission(item,item.READ)}">
            <li>
              <t:jobLink job="${item}"/>             
            </li>
            </j:if>
          </j:forEach>
        </ul>
      </j:if>
    </d:tag>
  </d:taglib>
  <j:if test="${it.supportsMakeDisabled()}">
    <st:include page="makeDisabled.jelly" />
  </j:if>

  <p:projectActionFloatingBox />

  <table style="margin-top: 1em; margin-left:1em;">

    <j:forEach var="act" items="${it.prominentActions}">
      <t:summary icon="${act.iconFileName}" href="${act.urlName}">
        ${act.displayName}
      </t:summary>
    </j:forEach>
    <t:summary icon="folder.png" href="ws/" permission="${it.WORKSPACE}">
      ${%Workspace}
    </t:summary>
   
    <t:summary icon="${rootURL}/plugin/sdom-connect/images/48x48/folder-downloads.png" href="downloadTestArtifacts/" permission="${it.WORKSPACE}" >
      ${%Download Test Artifacts}
    </t:summary>
      
     <t:summary icon="folder.png" href="codeCoverage/" permission="${it.WORKSPACE}">
      ${%Code Coverage}
    </t:summary>
  
    <t:artifactList caption="${%Last Successful Artifacts}"
        build="${it.lastSuccessfulBuild}" baseURL="lastSuccessfulBuild/"
        permission="${it.lastSuccessfulBuild.ARTIFACTS}"/>

    <t:summary icon="notepad.png" href="changes">
      ${%Recent Changes}
    </t:summary>

    <j:set var="tr" value="${it.lastCompletedBuild.testResultAction}"/>
    <j:if test="${tr!=null}">
      <j:if test="${tr.class.name != 'hudson.tasks.test.AggregatedTestResultPublisher$TestResultAction'}">
        <t:summary icon="clipboard.png">
          <a href="lastCompletedBuild/${tr.urlName}/" class="model-link inside">${%Latest Test Result}</a>
          <t:test-result it="${tr}" />
        </t:summary>
      </j:if>
    </j:if>

    <j:forEach var="atr" items="${it.lastCompletedBuild.allActions}">
      <j:if test="${atr!=null}">
        <j:if test="${atr.class.name == 'hudson.tasks.test.AggregatedTestResultPublisher$TestResultAction'}">
          <t:summary icon="clipboard.png">
            <a href="lastCompletedBuild/${atr.urlName}/" class="model-link inside">${%Latest Aggregated Test Result}</a>
            <t:test-result it="${atr}" />
          </t:summary>
        </j:if>
      </j:if>
    </j:forEach>
   
  </table>
 
 <local:list title="${%Special Child Projects}" items="${it.children}" />
  <!-- up="true" -->
 <!--  <j:forEach var="child" items="${it.children}">
    <t:summary icon="folder.png" href="codeCoverage/" permission="${it.WORKSPACE}">
      ${child}
    </t:summary>
  </j:forEach> -->
 
  <!-- merge fragments from the actions -->
  <j:forEach var="a" items="${it.allActions}">
    <st:include page="jobMain.jelly" it="${a}" optional="true" />
  </j:forEach>

  <p:upstream-downstream />
 

</j:jelly>



SpecialMainProject.java:

package com.myproject;

public class SpecialMainProject extends Project<SpecialMainProject, SpecialMainBuild>
        implements TopLevelItem, SCMedItem, CommonConstants {
    private String componentName;
    private String componentVariant;
    private String componentRevision;
    private final String className = "special";
    private List<FreeStyleProject> children = new ArrayList<FreeStyleProject>();

    private ListView currentView;

    private static final Logger LOGGER = Logger.getLogger(SpecialMainProject.class
            .getName());

    public SpecialMainProject(String name) {
        this(Jenkins.getInstance(), name);
    }

    protected SpecialMainProject(ItemGroup parent, String name) {
        super(parent, name);
    }

    @Override
    public DescriptorImpl getDescriptor() {
        return DESCRIPTOR;
    }

    @Extension(ordinal = 1000)
    public static final DescriptorImpl DESCRIPTOR = new DescriptorImpl();

    @Override
    protected Class<SpecialMainBuild> getBuildClass() {
        return SpecialMainBuild.class;
    }

    @Override
    public void doConfigSubmit(StaplerRequest req, StaplerResponse rsp)
            throws IOException, ServletException, FormException {

        JSONObject submittedForm = req.getSubmittedForm();
        JSONObject scmValues = new JSONObject();
        JSONObject hudsonModel = new JSONObject();

        hudsonModel.accumulate("hudson-model-ParametersDefinitionProperty",
                new JSONObject());
        hudsonModel.accumulate("stapler-class-bag", "true");
        submittedForm.accumulate("properties", hudsonModel);

        this.componentName = submittedForm.getString("componentName");
        this.componentVariant = submittedForm.getString("componentVariant");
        this.componentRevision = submittedForm.getString("componentRevision");

        super.doConfigSubmit(req, rsp);
        updateTransientActions();
       
    }

    public static final class DescriptorImpl extends AbstractProjectDescriptor {
        private final String SPECIAL_RADIO_BUTTON_NAME = "Build a Special Project";

        /**
         * gets the display name
         */
        public String getDisplayName() {
            return SPECIAL_RADIO_BUTTON_NAME;
        }

        /**
         * returns the new instance of SpecialMainProject
         *
         * @param parent
         *            parent object
         * @param name
         *            job name
         */
        public SpecialMainProject newInstance(ItemGroup parent, String name) {
            return new SpecialMainProject(parent, name);
        }

    }

    @Override
    public synchronized void save() throws IOException {
        super.save();
        final String newName = componentName+"_"+componentVariant;
        // Create as many as Free Style Projects.
        if (componentName != null && componentVariant != null && componentRevision != null && Jenkins.getInstance().getItem(newName) == null && Jenkins.getInstance().getItem(newName+"_1") == null) {
           
            FreeStyleProject childProject = Jenkins.getInstance().createProject(FreeStyleProject.class,newName);
            FreeStyleProject childProject1 = Jenkins.getInstance().createProject(FreeStyleProject.class,newName+"_1");
            Collection<View> views = Jenkins.getInstance().getViews();
           
            for (View view : views) {
                if (view.contains(this) && !view.getDisplayName().equalsIgnoreCase("All")){
                    System.out.println("This view has Special project : "+ view.getDisplayName());
                    if(view instanceof ListView)
                    {
                        currentView = (ListView) view;
                    }
                }
            }
           
                                 
            try{
                TimerTrigger trigger = new TimerTrigger(TRIGGER_NIGHTLY);
                TimerTrigger trigger1 = new TimerTrigger(TRIGGER_NIGHTLY);   
               
                childProject.addTrigger(trigger);
                childProject1.addTrigger(trigger1);
           
           
            } catch (ANTLRException e) {
                LOGGER.log(Level.SEVERE,
                        "Exception during adding trigger" + e.getLocalizedMessage());

            }
                       
            if(currentView != null){
                currentView.add(childProject);
                currentView.add(childProject1);
            }
           
            childProject.save();
            childProject1.save();
           
            children.add(childProject);
            children.add(childProject1);
        }
       
       
    }

    public List<FreeStyleProject> getChildren() {
        return children;
    }

    public String getComponentName() {
        return componentName;
    }

    public void setComponentName(String componentName) {
        this.componentName = componentName;
    }

    public String getComponentVariant() {
        return componentVariant;
    }

    public void setComponentVariant(String componentVariant) {
        this.componentVariant = componentVariant;
    }
   
    public void setChildren(List<FreeStyleProject> children) {
        this.children = children;
    }

    @Override
    public synchronized void delete() throws IOException, InterruptedException {
        super.delete();
       
        for (FreeStyleProject kid : children) {
            kid.delete();
        }
        children.clear();
    }
}

Steps that I took to solve the exception: (but nothing worked) :

1.In main.jelly file, added a new name space as : xmlns:local1="/lib/myproject"

2. Changed the d:taglib as  <d:taglib uri="/lib/myproject"> and  updated <local1:list title="${%Special Child Projects}" items="${it.children}" />

3. In src/main/resources , created lib and lib/myproject folders and one empty taglib text file

4. Created MyprojectTagLib Interface (extends TypedTagLibrary) in src/main/java/lib/myproject and MyprojectTagLib.gdsl

similar to these: lib.jenkins.ProjectTagLib.java and lib.jenkins.ProjectTagLib.gdsl

5. Added maven dependency :

<dependency>
    <groupId>org.kohsuke.stapler</groupId>
    <artifactId>stapler-jelly</artifactId>
    <version>1.231</version>
</dependency>
<dependency>
    <groupId>org.kohsuke.stapler</groupId>
    <artifactId>stapler</artifactId>
    <version>1.231</version>
</dependency>

While debugging, at AbstractItem.java:324, I got to see that the parent was null (after Jenkins restart).

I am not sure what is wrong  and what I am missing.

Could anyone help me with this issue?

Thank you in advance!

P.S. Jenkins  version: <version>1.532</version>

Regards
Vinodhini

Jesse Glick

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Apr 22, 2015, 7:03:55 AM4/22/15
to Jenkins Dev
On Wed, Apr 22, 2015 at 4:14 AM, <vinodhi...@gmail.com> wrote:
> While debugging, at AbstractItem.java:324, I got to see that the parent was null (after Jenkins restart).
>
> I am not sure what is wrong and what I am missing.

Your SpecialMainProject or its children is somehow to blame, not the
Jelly views. Most likely your mistake was persisting its children in
the `children` field. This cannot work.

Creating a new project type is a serious endeavour; there are a lot of
subtle considerations, and you have to understand the details of how
Jenkins loads and save items. I would not attempt it unless you are
pretty experienced with plugin development. It is usually not
something you want to do even then; generally you want to tack
behavior on to an existing project type.

vinodhi...@gmail.com

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Apr 22, 2015, 9:30:40 AM4/22/15
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Thank you for your reply.

May I know how could I learn this - details of how Jenkins loads and save items ?

Is there any Flowchart or Workflow of Jenkins(how internal classes and jellies are connected and loaded) available ?

I am really interested in this and also, I would like to contribute plugins to Jenkins.

Regards
Vinodhini

Robert Sandell

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Apr 22, 2015, 9:35:13 AM4/22/15
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A first start could be to study the Folder Plugin https://github.com/jenkinsci/cloudbees-folder-plugin

/B

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Jesse Glick

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Apr 23, 2015, 12:11:19 PM4/23/15
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On Wed, Apr 22, 2015 at 9:30 AM, <vinodhi...@gmail.com> wrote:
> Is there any Flowchart or Workflow of Jenkins(how internal classes and
> jellies are connected and loaded) available ?

I am afraid not. You have to read sources and experiment.

vinodhi...@gmail.com

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May 6, 2015, 6:03:29 AM5/6/15
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Thank you all  !!

I made the below changes and it is working fine.

1. Modified children as transient and modified its type to Map<String, FreeStyleProject>
2. Added another Interface ItemGroup (for SpecialMainProject) and implemented all abstract methods
3. Initialized ItemGroupMixIn and  used this object to createProject so that all my child projects are within the main parent project.
4. Overridden onLoad method and load all child jobs using loadChildren (from ItemGroupMixIn)

No change in Jelly file( that was shared in first post)..
 
Thanks again!
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