GroupByKeyTest BasicTests testLargeKeys100MB flake (on ULR)

java.lang.RuntimeException: The Runner experienced the following error during execution:
Traceback (most recent call last):
  File "/home/jenkins/jenkins-slave/workspace/beam_PostCommit_Java_ValidatesRunner_ULR/src/sdks/python/apache_beam/runners/portability/local_job_service.py", line 275, in _run_job
    self.result = self._invoke_runner()
  File "/home/jenkins/jenkins-slave/workspace/beam_PostCommit_Java_ValidatesRunner_ULR/src/sdks/python/apache_beam/runners/portability/local_job_service.py", line 297, in _invoke_runner
    return fn_runner.FnApiRunner(
  File "/home/jenkins/jenkins-slave/workspace/beam_PostCommit_Java_ValidatesRunner_ULR/src/sdks/python/apache_beam/runners/portability/fn_api_runner/fn_runner.py", line 208, in run_via_runner_api
    return self.run_stages(stage_context, stages)
  File "/home/jenkins/jenkins-slave/workspace/beam_PostCommit_Java_ValidatesRunner_ULR/src/sdks/python/apache_beam/runners/portability/fn_api_runner/fn_runner.py", line 408, in run_stages
    bundle_results = self._execute_bundle(
  File "/home/jenkins/jenkins-slave/workspace/beam_PostCommit_Java_ValidatesRunner_ULR/src/sdks/python/apache_beam/runners/portability/fn_api_runner/fn_runner.py", line 736, in _execute_bundle
    self._run_bundle(
  File "/home/jenkins/jenkins-slave/workspace/beam_PostCommit_Java_ValidatesRunner_ULR/src/sdks/python/apache_beam/runners/portability/fn_api_runner/fn_runner.py", line 966, in _run_bundle
    result, splits = bundle_manager.process_bundle(
  File "/home/jenkins/jenkins-slave/workspace/beam_PostCommit_Java_ValidatesRunner_ULR/src/sdks/python/apache_beam/runners/portability/fn_api_runner/fn_runner.py", line 1315, in process_bundle
    raise RuntimeError(result.error)
RuntimeError: org.apache.beam.sdk.util.UserCodeException: java.lang.AssertionError: Count/ParMultiDo(Anonymous).output: Java heap space
	at org.apache.beam.sdk.util.UserCodeException.wrap(UserCodeException.java:39)
	at org.apache.beam.sdk.testing.PAssert$DefaultConcludeFn$DoFnInvoker.invokeProcessElement(Unknown Source)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForParDo(FnApiDoFnRunner.java:773)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:255)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:209)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.outputTo(FnApiDoFnRunner.java:1760)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.access$2800(FnApiDoFnRunner.java:142)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$NonWindowObservingProcessBundleContext.outputWithTimestamp(FnApiDoFnRunner.java:2311)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$ProcessBundleContextBase.output(FnApiDoFnRunner.java:2481)
	at org.apache.beam.sdk.testing.PAssert$GroupedValuesCheckerDoFn.processElement(PAssert.java:1588)
	at org.apache.beam.sdk.testing.PAssert$GroupedValuesCheckerDoFn$DoFnInvoker.invokeProcessElement(Unknown Source)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForParDo(FnApiDoFnRunner.java:773)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:255)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:209)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.outputTo(FnApiDoFnRunner.java:1760)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.access$2800(FnApiDoFnRunner.java:142)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$NonWindowObservingProcessBundleContext.outputWithTimestamp(FnApiDoFnRunner.java:2311)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$ProcessBundleContextBase.output(FnApiDoFnRunner.java:2481)
	at org.apache.beam.sdk.transforms.DoFnOutputReceivers$WindowedContextOutputReceiver.output(DoFnOutputReceivers.java:78)
	at org.apache.beam.sdk.transforms.MapElements$1.processElement(MapElements.java:142)
	at org.apache.beam.sdk.transforms.MapElements$1$DoFnInvoker.invokeProcessElement(Unknown Source)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForParDo(FnApiDoFnRunner.java:773)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:255)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:209)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.outputTo(FnApiDoFnRunner.java:1760)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.access$2800(FnApiDoFnRunner.java:142)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$NonWindowObservingProcessBundleContext.outputWithTimestamp(FnApiDoFnRunner.java:2311)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$ProcessBundleContextBase.output(FnApiDoFnRunner.java:2481)
	at org.apache.beam.sdk.testing.PAssert$ConcatFn.processElement(PAssert.java:1425)
	at org.apache.beam.sdk.testing.PAssert$ConcatFn$DoFnInvoker.invokeProcessElement(Unknown Source)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForParDo(FnApiDoFnRunner.java:773)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:255)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:209)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.outputTo(FnApiDoFnRunner.java:1760)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.access$2800(FnApiDoFnRunner.java:142)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$NonWindowObservingProcessBundleContext.outputWithTimestamp(FnApiDoFnRunner.java:2311)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$ProcessBundleContextBase.output(FnApiDoFnRunner.java:2481)
	at org.apache.beam.sdk.transforms.DoFnOutputReceivers$WindowedContextOutputReceiver.output(DoFnOutputReceivers.java:78)
	at org.apache.beam.sdk.transforms.MapElements$1.processElement(MapElements.java:142)
	at org.apache.beam.sdk.transforms.MapElements$1$DoFnInvoker.invokeProcessElement(Unknown Source)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForParDo(FnApiDoFnRunner.java:773)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:255)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:209)
	at org.apache.beam.fn.harness.BeamFnDataReadRunner.forwardElementToConsumer(BeamFnDataReadRunner.java:179)
	at org.apache.beam.sdk.fn.data.BeamFnDataInboundObserver2.multiplexElements(BeamFnDataInboundObserver2.java:158)
	at org.apache.beam.sdk.fn.data.BeamFnDataInboundObserver2.awaitCompletion(BeamFnDataInboundObserver2.java:123)
	at org.apache.beam.fn.harness.control.ProcessBundleHandler.processBundle(ProcessBundleHandler.java:528)
	at org.apache.beam.fn.harness.control.BeamFnControlClient.delegateOnInstructionRequestType(BeamFnControlClient.java:151)
	at org.apache.beam.fn.harness.control.BeamFnControlClient$InboundObserver.lambda$onNext$0(BeamFnControlClient.java:116)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.AssertionError: Count/ParMultiDo(Anonymous).output: Java heap space
	at org.apache.beam.sdk.testing.PAssert$PAssertionSite.capture(PAssert.java:175)
	at org.apache.beam.sdk.testing.PAssert.that(PAssert.java:460)
	at org.apache.beam.sdk.testing.PAssert.that(PAssert.java:452)
	at org.apache.beam.sdk.transforms.GroupByKeyTest.runLargeKeysTest(GroupByKeyTest.java:895)
	at org.apache.beam.sdk.transforms.GroupByKeyTest.access$200(GroupByKeyTest.java:106)
	at org.apache.beam.sdk.transforms.GroupByKeyTest$BasicTests.testLargeKeys100MB(GroupByKeyTest.java:601)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.apache.beam.sdk.testing.TestPipeline$1.evaluate(TestPipeline.java:323)
	at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:258)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.junit.runners.Suite.runChild(Suite.java:128)
	at org.junit.runners.Suite.runChild(Suite.java:27)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:110)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
	at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:62)
	at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
	at sun.reflect.GeneratedMethodAccessor53.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
	at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
	at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker$2.run(TestWorker.java:176)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
	at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:133)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:71)
	at worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
	at worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
Caused by: java.lang.OutOfMemoryError: Java heap space
	at java.util.Arrays.copyOf(Arrays.java:3332)
	at java.lang.String.<init>(String.java:166)
	at org.apache.beam.sdk.transforms.GroupByKeyTest.bigString(GroupByKeyTest.java:865)
	at org.apache.beam.sdk.transforms.GroupByKeyTest.lambda$runLargeKeysTest$4823aa2b$1(GroupByKeyTest.java:901)
	at org.apache.beam.sdk.transforms.GroupByKeyTest$$Lambda$409/1372504890.apply(Unknown Source)
	at org.apache.beam.sdk.testing.PAssert.doChecks(PAssert.java:1621)
	at org.apache.beam.sdk.testing.PAssert$GroupedValuesCheckerDoFn.processElement(PAssert.java:1588)
	at org.apache.beam.sdk.testing.PAssert$GroupedValuesCheckerDoFn$DoFnInvoker.invokeProcessElement(Unknown Source)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForParDo(FnApiDoFnRunner.java:773)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$$Lambda$215/724184227.accept(Unknown Source)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:255)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:209)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.outputTo(FnApiDoFnRunner.java:1760)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.access$2800(FnApiDoFnRunner.java:142)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$NonWindowObservingProcessBundleContext.outputWithTimestamp(FnApiDoFnRunner.java:2311)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$ProcessBundleContextBase.output(FnApiDoFnRunner.java:2481)
	at org.apache.beam.sdk.transforms.DoFnOutputReceivers$WindowedContextOutputReceiver.output(DoFnOutputReceivers.java:78)
	at org.apache.beam.sdk.transforms.MapElements$1.processElement(MapElements.java:142)
	at org.apache.beam.sdk.transforms.MapElements$1$DoFnInvoker.invokeProcessElement(Unknown Source)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForParDo(FnApiDoFnRunner.java:773)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$$Lambda$215/724184227.accept(Unknown Source)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:255)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:209)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.outputTo(FnApiDoFnRunner.java:1760)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.access$2800(FnApiDoFnRunner.java:142)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$NonWindowObservingProcessBundleContext.outputWithTimestamp(FnApiDoFnRunner.java:2311)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$ProcessBundleContextBase.output(FnApiDoFnRunner.java:2481)
	at org.apache.beam.sdk.testing.PAssert$ConcatFn.processElement(PAssert.java:1425)
	at org.apache.beam.sdk.testing.PAssert$ConcatFn$DoFnInvoker.invokeProcessElement(Unknown Source)
	at org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForParDo(FnApiDoFnRunner.java:773)
	at org.apache.beam.fn.harness.FnApiDoFnRunner$$Lambda$215/724184227.accept(Unknown Source)
	at org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:255)