java.lang.IllegalStateException: Too many org.apache.tools.ant.module.api.IntrospectedInfo$ChangeTask (3) in shared RequestProcessor; create your own
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:368)
   at org.apache.tools.ant.module.api.IntrospectedInfo.fireStateChanged(IntrospectedInfo.java:206)
   at org.apache.tools.ant.module.api.IntrospectedInfo.register(IntrospectedInfo.java:372)
   at org.apache.tools.ant.module.api.IntrospectedInfo.register(IntrospectedInfo.java:357)
   at org.apache.tools.ant.module.api.IntrospectedInfo.loadNetBeansSpecificDefinitions0(IntrospectedInfo.java:340)
   at org.apache.tools.ant.module.api.IntrospectedInfo.loadNetBeansSpecificDefinitions(IntrospectedInfo.java:330)
   at org.apache.tools.ant.module.api.IntrospectedInfo.loadDefaults(IntrospectedInfo.java:172)
   at org.apache.tools.ant.module.api.IntrospectedInfo.init(IntrospectedInfo.java:136)
   at org.apache.tools.ant.module.api.IntrospectedInfo.access$500(IntrospectedInfo.java:95)
   at org.apache.tools.ant.module.api.IntrospectedInfo$2.stateChanged(IntrospectedInfo.java:644)
   at org.apache.tools.ant.module.api.IntrospectedInfo.merge(IntrospectedInfo.java:661)
   at org.apache.tools.ant.module.api.IntrospectedInfo.getKnownInfo(IntrospectedInfo.java:678)
   at org.netbeans.modules.ant.grammar.AntGrammar.getAntGrammar(AntGrammar.java:115)
   at org.netbeans.modules.ant.grammar.AntGrammar.typeOf(AntGrammar.java:196)
   at org.netbeans.modules.ant.grammar.AntGrammar.typeOf(AntGrammar.java:167)
   at org.netbeans.modules.ant.grammar.AntGrammar.queryElements(AntGrammar.java:334)
   at org.netbeans.modules.xml.text.completion.XMLCompletionQuery.queryElements(XMLCompletionQuery.java:313)
   at org.netbeans.modules.xml.text.completion.XMLCompletionQuery.query(XMLCompletionQuery.java:122)
   at org.netbeans.modules.xml.text.completion.XMLCompletionProvider$Query.query(XMLCompletionProvider.java:114)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:220)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1369)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1907)