Jenkins 2.150.1

Jenkins dies with the JVM going into perpetual ergonomics GC. The JVM has a 4Gb heap. The biggest XML file is 180Mb. So that's not a fundamental limitation. Something dumb is going on.

I think it might be repeatedly parsing the same XML file again and again, because when I dump jstack, I've seen a lot of different XML parsers there. This MIGHT be triggered by a @Parameterized junit test with 50,000 cases. In any case, this has made Jenkins totally unusable.

It also dies when we have a single JUnit case with a 1Gb output XML, but we have worked around that. But we cannot reduce the size of our test suite just to keep Jenkins happy.

Reported critical as this has stopped us from using Jenkins. Tempted to report blocker.

Here is some stack.

```
at com.thoughtworks.xstream.mapper.AnnotationMapper.processAnnotations(AnnotationMapper.java:180)
at com.thoughtworks.xstream.mapper.AnnotationMapper.defaultImplementationOf(AnnotationMapper.java:141)
at hudson.util.xstream.MapperDelegate.defaultImplementationOf(MapperDelegate.java:59)
at com.thoughtworks.xstream.mapper.MapperWrapper.defaultImplementationOf(MapperWrapper.java:46)
at hudson.util.RobustReflectionConverter.determineType(RobustReflectionConverter.java:475)
at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:327)
at hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:270)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:71)
at hudson.util.RobustCollectionConverter.populateCollection(RobustCollectionConverter.java:85)
at com.thoughtworks.xstream.converters.collections.CollectionConverter.unmarshal(CollectionConverter.java:80)
at hudson.util.RobustCollectionConverter.unmarshal(RobustCollectionConverter.java:76)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at hudson.util.RobustReflectionConverter.unmarshalField(RobustReflectionConverter.java:393)
at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:331)
at hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:270)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.readItem(AbstractCollectionConverter.java:71)
at hudson.util.RobustCollectionConverter.populateCollection(RobustCollectionConverter.java:85)
at com.thoughtworks.xstream.converters.collections.CollectionConverter.unmarshal(CollectionConverter.java:80)
at hudson.util.RobustCollectionConverter.unmarshal(RobustCollectionConverter.java:76)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at hudson.util.RobustReflectionConverter.unmarshalField(RobustReflectionConverter.java:393)
at hudson.util.RobustReflectionConverter.doUnmarshal(RobustReflectionConverter.java:331)
at hudson.util.RobustReflectionConverter.unmarshal(RobustReflectionConverter.java:270)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1189)
at hudson.util.XStream2.unmarshal(XStream2.java:161)
at hudson.util.XStream2.unmarshal(XStream2.java:132)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1173)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1053)
at hudson.XmlFile.read(XmlFile.java:147)
at hudson.tasks.junit.TestResultAction.load(TestResultAction.java:208)
at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:145)

• locked <0x0000000764f440a8> (a hudson.tasks.junit.TestResultAction)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:63)
  at hudson.tasks.test.AbstractTestResultAction.findCorrespondingResult(AbstractTestResultAction.java:252)
  at hudson.tasks.test.TestResult.getPreviousResult(TestResult.java:146)
  at hudson.tasks.junit.SuiteResult.getPreviousResult(SuiteResult.java:416)
  at hudson.tasks.junit.CaseResult.getPreviousResult(CaseResult.java:479)
  at hudson.tasks.junit.CaseResult.freeze(CaseResult.java:641)
  at hudson.tasks.junit.SuiteResult.freeze(SuiteResult.java:462)
  at hudson.tasks.junit.TestResult.freeze(TestResult.java:748)
  at hudson.tasks.junit.TestResultAction.load(TestResultAction.java:213)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:145)
  ...
  ...
  ...
  at hudson.tasks.junit.SuiteResult.freeze(SuiteResult.java:462)
  at hudson.tasks.junit.TestResult.freeze(TestResult.java:748)
  at hudson.tasks.junit.TestResultAction.load(TestResultAction.java:213)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:138)
• locked <0x00000006ef085628> (a hudson.tasks.junit.TestResultAction)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:63)
  at hudson.tasks.test.AbstractTestResultAction.findCorrespondingResult(AbstractTestResultAction.java:252)
  at hudson.tasks.test.TestResult.getPreviousResult(TestResult.java:146)
  at hudson.tasks.junit.SuiteResult.getPreviousResult(SuiteResult.java:416)
  at hudson.tasks.junit.CaseResult.getPreviousResult(CaseResult.java:479)
  at hudson.tasks.junit.CaseResult.freeze(CaseResult.java:641)
  at hudson.tasks.junit.SuiteResult.freeze(SuiteResult.java:462)
  at hudson.tasks.junit.TestResult.freeze(TestResult.java:748)
  at hudson.tasks.junit.TestResultAction.load(TestResultAction.java:213)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:138)
• locked <0x00000006e46233c0> (a hudson.tasks.junit.TestResultAction)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:63)
  at hudson.tasks.test.AbstractTestResultAction.findCorrespondingResult(AbstractTestResultAction.java:252)
  at hudson.tasks.test.TestResult.getPreviousResult(TestResult.java:146)
  at hudson.tasks.junit.SuiteResult.getPreviousResult(SuiteResult.java:416)
  at hudson.tasks.junit.CaseResult.getPreviousResult(CaseResult.java:479)
  at hudson.tasks.junit.CaseResult.freeze(CaseResult.java:641)
  at hudson.tasks.junit.SuiteResult.freeze(SuiteResult.java:462)
  at hudson.tasks.junit.TestResult.freeze(TestResult.java:748)
  at hudson.tasks.junit.TestResultAction.load(TestResultAction.java:213)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:138)
• locked <0x00000006d144c000> (a hudson.tasks.junit.TestResultAction)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:63)
  at hudson.tasks.test.AbstractTestResultAction.findCorrespondingResult(AbstractTestResultAction.java:252)
  at hudson.tasks.test.TestResult.getPreviousResult(TestResult.java:146)
  at hudson.tasks.junit.SuiteResult.getPreviousResult(SuiteResult.java:416)
  at hudson.tasks.junit.CaseResult.getPreviousResult(CaseResult.java:479)
  at hudson.tasks.junit.CaseResult.freeze(CaseResult.java:641)
  at hudson.tasks.junit.SuiteResult.freeze(SuiteResult.java:462)
  at hudson.tasks.junit.TestResult.freeze(TestResult.java:748)
  at hudson.tasks.junit.TestResultAction.load(TestResultAction.java:213)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:145)
• locked <0x00000006c3ce5168> (a hudson.tasks.junit.TestResultAction)
  at hudson.tasks.junit.TestResultAction.getResult(TestResultAction.java:63)
  at hudson.tasks.test.AbstractTestResultAction.findCorrespondingResult(AbstractTestResultAction.java:252)
  at hudson.tasks.test.TestResult.getPreviousResult(TestResult.java:146)
  at hudson.tasks.junit.SuiteResult.getPreviousResult(SuiteResult.java:416)
  at hudson.tasks.junit.CaseResult.getPreviousResult(CaseResult.java:479)
  at hudson.tasks.junit.CaseResult.getFailedSince(CaseResult.java:406)
  at hudson.tasks.junit.CaseResult.getAge(CaseResult.java:434)
  at hudson.tasks.junit.CaseResult$1.compare(CaseResult.java:754)
  at hudson.tasks.junit.CaseResult$1.compare(CaseResult.java:752)
  at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355)
  at java.util.TimSort.sort(TimSort.java:234)
  at java.util.Arrays.sort(Arrays.java:1512)
  at java.util.ArrayList.sort(ArrayList.java:1462)
  at java.util.Collections.sort(Collections.java:175)
  at hudson.tasks.junit.TestResult.freeze(TestResult.java:780)
  at hudson.tasks.junit.TestResultAction.setResult(TestResultAction.java:108)
• locked <0x00000006d144c120> (a hudson.tasks.junit.TestResultAction)
  at hudson.tasks.junit.TestResultAction.<init>(TestResultAction.java:85)
  at hudson.tasks.junit.JUnitResultArchiver.parseAndAttach(JUnitResultArchiver.java:175)
• locked <0x00000006c3d13a18> (a hudson.model.FreeStyleBuild)
  at hudson.tasks.junit.JUnitResultArchiver.perform(JUnitResultArchiver.java:154)
  at hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:81)
  at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
  at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:744)
  at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:690)
  at hudson.model.Build$BuildExecution.post2(Build.java:186)
  at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:635)
  at hudson.model.Run.execute(Run.java:1835)
  at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
  at hudson.model.ResourceController.execute(ResourceController.java:97)
  at hudson.model.Executor.run(Executor.java:429)
  ```