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java.lang.NullPointerException: 	at hudson.plugins.vmware.VMwareActivationWrapper$DescriptorImpl.getHostNames(VMwareActivationWrapper.java:383)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.apache.commons.jexl.util.PropertyExecutor.execute(PropertyExecutor.java:125)	at org.apache.commons.jexl.util.introspection.UberspectImpl$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:72)	at org.apache.commons.jelly.expression.ExpressionSupport.evaluateRecurse(ExpressionSupport.java:61)	at org.apache.commons.jelly.expression.ExpressionSupport.evaluateAsIterator(ExpressionSupport.java:94)	at org.apache.commons.jelly.tags.core.ForEachTag.doTag(ForEachTag.java:89)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:270)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	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.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.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	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.TagSupport.invokeBody(TagSupport.java:161)	at org.apache.commons.jelly.tags.core.ForEachTag.doTag(ForEachTag.java:191)	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.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.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.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: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.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.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.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.TagSupport.invokeBody(TagSupport.java:161)	at org.apache.commons.jelly.tags.core.WhenTag.doTag(WhenTag.java:46)	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.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.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.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.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.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.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.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: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.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: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.JellyFacet$1.dispatch(JellyFacet.java:90)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:562)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:640)	at org.kohsuke.stapler.MetaClass$7.doDispatch(MetaClass.java:242)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:562)	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:45)	at winstone.ServletConfiguration.execute(ServletConfiguration.java:249)	at winstone.RequestDispatcher.forward(RequestDispatcher.java:335)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:378)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:94)	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:86)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:195)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:195)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)	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 winstone.FilterConfiguration.execute(FilterConfiguration.java:195)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)	at winstone.RequestDispatcher.forward(RequestDispatcher.java:333)	at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:244)	at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150)	at java.lang.Thread.run(Thread.java:662)