OutOfMemory when executing the AppMap agent for JUnit5 project

Setup:

• fresh clone of https://github.com/junit-team/junit5
• Executed tests for sub-module junit5-platforms-tests using the JetBrains extension
• equivalent gradle command (without agent): ./gradlew :platform-tests:test

AppMap agent log file:
appmap-20240409115232.log.txt

These tests of JUnit5 seem to be executed with -Xmx1g.
Tests passed when I used -Xmx4g. I did not test other values.

> Task :platform-tests:test FAILED

Execution failed for task ':platform-tests:test'.
> Failure during test execution: Forked test JVM terminated unexpectedly with exit value 1
  Standard error from JVM:
      AppMap Java Agent log file: /home/jansorg/self-employment/customers/AppLand/sources/junit5/platform-tests/appmap-20240409115232.log
      Terminating due to fatal error
      java.lang.OutOfMemoryError: Java heap space
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.PackIndexV2.<init>(PackIndexV2.java:94)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.PackIndex.read(PackIndex.java:101)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.PackIndex.open(PackIndex.java:67)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.Pack.idx(Pack.java:161)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.Pack.get(Pack.java:273)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.PackDirectory.open(PackDirectory.java:216)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.ObjectDirectory.openPackedObject(ObjectDirectory.java:393)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.ObjectDirectory.openPackedFromSelfOrAlternate(ObjectDirectory.java:356)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.ObjectDirectory.openObjectWithoutRestoring(ObjectDirectory.java:346)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.ObjectDirectory.openObject(ObjectDirectory.java:331)
      	at com.appland.shade.org.eclipse.jgit.internal.storage.file.WindowCursor.open(WindowCursor.java:132)
      	at com.appland.shade.org.eclipse.jgit.lib.ObjectReader.open(ObjectReader.java:212)
      	at com.appland.shade.org.eclipse.jgit.revwalk.RevWalk.parseAny(RevWalk.java:1075)
      	at com.appland.shade.org.eclipse.jgit.lib.Repository.parseSimple(Repository.java:833)
      	at com.appland.shade.org.eclipse.jgit.lib.Repository.resolve(Repository.java:527)
      	at com.appland.shade.org.eclipse.jgit.lib.Repository.resolve(Repository.java:472)
      	at com.appland.appmap.util.GitUtil.open(GitUtil.java:77)
      	at com.appland.appmap.record.AppMapSerializer.write(AppMapSerializer.java:72)
      	at com.appland.appmap.record.RecordingSession.stop(RecordingSession.java:127)
      	at com.appland.appmap.record.Recorder.stop(Recorder.java:236)
      	at com.appland.appmap.process.hooks.RecordingSupport.stopRecording(RecordingSupport.java:92)
      	at com.appland.appmap.process.hooks.RecordingSupport.stopRecording(RecordingSupport.java:70)
      	at com.appland.appmap.process.hooks.test.JUnit.junit5Test(JUnit.java:52)
      	at org.junit.platform.console.ConsoleDetailsTests$ReportTestCase.reportMultipleMessages(ConsoleDetailsTests.java:167)
      	at java.base/java.lang.invoke.DirectMethodHandle$Holder.invokeVirtual(DirectMethodHandle$Holder)
      	at java.base/java.lang.invoke.LambdaForm$MH/0x000077687835ac00.invoke(LambdaForm$MH)
      	at java.base/java.lang.invoke.Invokers$Holder.invokeExact_MT(Invokers$Holder)
      	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl(DirectMethodHandleAccessor.java:154)
      	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
      	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
      	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:765)
      	at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)

appmap.yml file generated by the JetBrains plugin:

name: "junit5"
appmap_dir: "tmp/appmap"
packages:
- path: "buildparameters"
- path: "console.details.basic"
- path: "console.details.fail"
- path: "console.details.report"
- path: "console.details.skip"
- path: "example"
- path: "extensions"
- path: "folder with spaces"
- path: "gradle.kotlin.dsl.accessors._1cd57f1730507bf1765dcbcf508dc5fb"
- path: "gradle.kotlin.dsl.accessors._3756b237d27150396a2a7d0e8398ffaf"
- path: "gradle.kotlin.dsl.accessors._47d3d4fc83e5a2ae6e7a0e19501e23be"
- path: "gradle.kotlin.dsl.accessors._579eac99329038b17447d712a6a1515d"
- path: "gradle.kotlin.dsl.accessors._62452d30e9e5dc1400d85f0225333ef2"
- path: "gradle.kotlin.dsl.accessors._6ee420c7dc76f07b30f8a11923082fd4"
- path: "gradle.kotlin.dsl.accessors._98e16a40184ebf662feaccf584efe710"
- path: "gradle.kotlin.dsl.accessors._992409541dd24c260299460f73be445b"
- path: "gradle.kotlin.dsl.accessors._b43a41b3a2c24e7f863347686afebb31"
- path: "gradle.kotlin.dsl.accessors._d1dd92b90925cf4ae91ddd9ebd3e792c"
- path: "gradle.kotlin.dsl.accessors._e054d9723d982fdb55b1e388b8ab0cbf"
- path: "gradle.kotlin.dsl.accessors._eda3f35d0982a00f55a620f026a61d00"
- path: "gradle.kotlin.dsl.accessors._ef30aec8794e1486097d62d990bb8936"
- path: "gradle.kotlin.dsl.accessors._f680a2a4c0b9b61773cee4bcf4548485"
- path: "gradle.kotlin.dsl.plugins._3e72e2df1d352419a49398ccbc04a248"
- path: "intercepted-testservices.META-INF.services"
- path: "junitbuild.exec"
- path: "junitbuild.java"
- path: "junitbuild.javadoc"
- path: "listeners.uidtracking.gradle.groovy"
- path: "listeners.uidtracking.gradle.kotlin"
- path: "listeners.uidtracking.maven"
- path: "META-INF.services"
- path: "modules-2500.foo"
- path: "modules-2500.foo.bar"
- path: "org.junit.api.tools"
- path: "org.junit.jupiter"
- path: "org.junit.platform"
- path: "org.junit.vintage.engine"
- path: "platform.tooling.support"
- path: "testservices.META-INF.services"

``

Reproduce the failure with ./gradlew :platform-tests:test in the JUnit5 project using the AppMap agent, comparing the reported -Xmx1g and -Xmx4g settings. Start at GitUtil.open, AppMapSerializer.write, and RecordingSession.stop in the stack trace, then verify that the test completes without the Java heap-space error.