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Trying out my app using autoproject in 6.7beta, and I'm running into a deadlock when building, similar to to issue #132945 Thread dump: Found one Java-level deadlock: ============================= "Thread-11": waiting to lock monitor 0x09b1296c (object 0x749e4668, a org.apache.tools.ant.Project$AntRefTable), which is held by "Thread-10" "Thread-10": waiting to lock monitor 0x684021b8 (object 0x749e3310, a org.apache.tools.ant.Project), which is held by "Thread-11" Java stack information for the threads listed above: =================================================== "Thread-11": at java.util.Hashtable.get(Hashtable.java:333) - waiting to lock <0x749e4668> (a org.apache.tools.ant.Project$AntRefTable) at org.apache.tools.ant.Project$AntRefTable.getReal(Project.java:2357) at org.apache.tools.ant.Project$AntRefTable.get(Project.java:2373) at org.apache.tools.ant.Project.getReference(Project.java:1975) at org.apache.tools.ant.PropertyHelper.getPropertyHelper(PropertyHelper.java:131) - locked <0xeb322c18> (a java.lang.Class for org.apache.tools.ant.PropertyHelper) at org.apache.tools.ant.Project.getProperty(Project.java:587) at org.apache.tools.ant.module.bridge.impl.NbBuildLogger$Event.getScriptLocation(NbBuildLogger.java:1052) at org.apache.tools.ant.module.spi.AntEvent.getScriptLocation(AntEvent.java:138) at org.apache.tools.ant.module.bridge.impl.NbBuildLogger.getInterestedLoggersByEvent(NbBuildLogger.java:259) at org.apache.tools.ant.module.bridge.impl.NbBuildLogger.messageLogged(NbBuildLogger.java:605) at org.apache.tools.ant.Project.fireMessageLoggedEvent(Project.java:2200) - locked <0x749e3310> (a org.apache.tools.ant.Project) at org.apache.tools.ant.Project.fireMessageLogged(Project.java:2237) at org.apache.tools.ant.Project.log(Project.java:445) at org.apache.tools.ant.Project.log(Project.java:434) at org.apache.tools.ant.AntClassLoader.log(AntClassLoader.java:404) at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1339) at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1088) - locked <0x73ce9480> (a org.apache.tools.ant.AntClassLoader) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) - locked <0x73ce9480> (a org.apache.tools.ant.AntClassLoader) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at org.apache.tools.ant.AntClassLoader.defineClassFromData(AntClassLoader.java:1146) at org.apache.tools.ant.AntClassLoader.getClassFromStream(AntClassLoader.java:1324) at org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1388) at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1341) at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1088) - locked <0x73ce9480> (a org.apache.tools.ant.AntClassLoader) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) - locked <0x73ce9480> (a org.apache.tools.ant.AntClassLoader) at com.sun.tools.xjc.reader.xmlschema.bindinfo.BindInfo.getJAXBContext(BindInfo.java:316) - locked <0xeb87a950> (a java.lang.Class for com.sun.tools.xjc.reader.xmlschema.bindinfo.AnnotationParserFactoryImpl) at com.sun.tools.xjc.reader.xmlschema.bindinfo.AnnotationParserFactoryImpl$1.<init>(AnnotationParserFactoryImpl.java:63) at com.sun.tools.xjc.reader.xmlschema.bindinfo.AnnotationParserFactoryImpl.create(AnnotationParserFactoryImpl.java:62) at com.sun.xml.xsom.impl.parser.NGCCRuntimeEx.createAnnotationParser(NGCCRuntimeEx.java:320) at com.sun.xml.xsom.impl.parser.state.annotation.action0(annotation.java:48) at com.sun.xml.xsom.impl.parser.state.annotation.enterElement(annotation.java:68) at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.sendEnterElement(NGCCRuntime.java:378) at com.sun.xml.xsom.impl.parser.state.NGCCHandler.spawnChildFromEnterElement(NGCCHandler.java:74) at com.sun.xml.xsom.impl.parser.state.Schema.enterElement(Schema.java:213) at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.sendEnterElement(NGCCRuntime.java:378) at com.sun.xml.xsom.impl.parser.state.NGCCHandler.revertToParentFromEnterElement(NGCCHandler.java:111) at com.sun.xml.xsom.impl.parser.state.foreignAttributes.enterElement(foreignAttributes.java:50) at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.sendEnterElement(NGCCRuntime.java:378) at com.sun.xml.xsom.impl.parser.state.NGCCHandler.spawnChildFromEnterElement(NGCCHandler.java:74) at com.sun.xml.xsom.impl.parser.state.Schema.enterElement(Schema.java:436) at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.sendEnterElement(NGCCRuntime.java:378) at com.sun.xml.xsom.impl.parser.state.Schema.enterElement(Schema.java:205) at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.sendEnterElement(NGCCRuntime.java:378) at com.sun.xml.xsom.impl.parser.state.Schema.enterElement(Schema.java:181) at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.sendEnterElement(NGCCRuntime.java:378) at com.sun.xml.xsom.impl.parser.state.Schema.enterElement(Schema.java:372) at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.sendEnterElement(NGCCRuntime.java:378) at com.sun.xml.xsom.impl.parser.state.Schema.enterElement(Schema.java:388) at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.sendEnterElement(NGCCRuntime.java:378) at com.sun.xml.xsom.impl.parser.state.Schema.enterElement(Schema.java:193) at com.sun.xml.xsom.impl.parser.state.NGCCRuntime.startElement(NGCCRuntime.java:219) at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527) at com.sun.tools.xjc.util.SubtreeCutter.startElement(SubtreeCutter.java:68) at com.sun.tools.xjc.reader.ExtensionBindingChecker.startElement(ExtensionBindingChecker.java:128) at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527) at com.sun.tools.xjc.reader.xmlschema.parser.IncorrectNamespaceURIChecker.startElement(IncorrectNamespaceURIChecker.java:97) at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527) at com.sun.tools.xjc.reader.xmlschema.parser.CustomizationContextChecker.startElement(CustomizationContextChecker.java:172) at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527) at com.sun.tools.xjc.ModelLoader$SpeculationChecker.startElement(ModelLoader.java:439) at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527) at com.sun.tools.xjc.reader.internalizer.VersionChecker.startElement(VersionChecker.java:82) at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:527) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:501) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:400) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2747) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522) at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:333) at com.sun.xml.xsom.parser.JAXPParser.parse(JAXPParser.java:79) at com.sun.tools.xjc.ModelLoader$2.parse(ModelLoader.java:463) at com.sun.tools.xjc.ModelLoader$XMLSchemaParser.parse(ModelLoader.java:246) at com.sun.xml.xsom.impl.parser.NGCCRuntimeEx.parseEntity(NGCCRuntimeEx.java:298) at com.sun.xml.xsom.impl.parser.ParserContext.parse(ParserContext.java:87) at com.sun.xml.xsom.parser.XSOMParser.parse(XSOMParser.java:147) at com.sun.tools.xjc.ModelLoader.createXSOMSpeculative(ModelLoader.java:480) at com.sun.tools.xjc.ModelLoader.loadXMLSchema(ModelLoader.java:350) at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:151) at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:97) at com.sun.tools.xjc.XJC2Task._doXJC(XJC2Task.java:469) at com.sun.tools.xjc.XJC2Task.doXJC(XJC2Task.java:416) at com.sun.tools.xjc.XJC2Task.execute(XJC2Task.java:351) at com.sun.tools.xjc.XJCTask.execute(XJCTask.java:67) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:357) at org.apache.tools.ant.Target.performTasks(Target.java:385) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337) at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38) at org.apache.tools.ant.Project.executeTargets(Project.java:1189) at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:416) at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.taskdefs.Parallel$TaskRunnable.run(Parallel.java:428) at java.lang.Thread.run(Thread.java:619) "Thread-10": at org.apache.tools.ant.Project.fireMessageLoggedEvent(Project.java:2178) - waiting to lock <0x749e3310> (a org.apache.tools.ant.Project) at org.apache.tools.ant.Project.fireMessageLogged(Project.java:2237) at org.apache.tools.ant.Project.log(Project.java:445) at org.apache.tools.ant.Project.log(Project.java:434) at org.apache.tools.ant.Project.addReference(Project.java:1950) - locked <0x749e4668> (a org.apache.tools.ant.Project$AntRefTable) at org.apache.tools.ant.taskdefs.Ant.copyReference(Ant.java:574) at org.apache.tools.ant.taskdefs.Ant.addReferences(Ant.java:519) at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:408) at org.apache.tools.ant.taskdefs.SubAnt.execute(SubAnt.java:289) at org.apache.tools.ant.taskdefs.SubAnt.execute(SubAnt.java:208) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:357) at org.apache.tools.ant.Target.performTasks(Target.java:385) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337) at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38) at org.apache.tools.ant.Project.executeTargets(Project.java:1189) at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:416) at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:105) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:62) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.taskdefs.Parallel$TaskRunnable.run(Parallel.java:428) at java.lang.Thread.run(Thread.java:619) Found 1 deadlock.
Not similar to 132945. Looks to be a bug in Ant. Do you have any way of reproducing on a self-contained test case?
Sounds very similar to an Ant bug claimed to be fixed in 1.8.0 dev builds. Please use the Ant bug tracker to verify. In general, <parallel> is not very heavily tested AFAIK and you are liable to run into problems if you use this task.