JDK-8240908 added a new test that is now seen to fail intermittently:

----------System.out:(163/7668)----------
InstrumentationHandoff JPLIS agent initialized
Reading test class from /System/Volumes/Data/mesos/work_dir/slaves/c82600aa-2448-475c-8c08-6f02a5b3f3af-S22806/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/85c40bfb-9782-46c7-90ed-85b8d360aa74/runs/754600a9-2a5f-4382-8878-a63263c49a70/testoutput/test-support/jtreg_open_test_jdk_tier3/classes/3/java/lang/instrument/RetransformWithMethodParametersTest.d/MethodParametersTarget.class
Read 502 bytes.
Params of method1 method (2):
  0: intParam1 (present)
  1: stringParam1 (present)
Debugging message: Added transformer RetransformWithMethodParametersTest$Transformer with canRetransform=true
Testcase 1: ensure ClassFileReconstituter restores MethodParameters attribute
RetransformWithMethodParametersTest$Transformer.transform() sees 'MethodParametersTarget' of 502 bytes.
Class bytes are different.
expected -------------------
[2022-02-04T01:20:26.422653Z] Gathering output for process 13406
[2022-02-04T01:20:26.838675Z] Waiting for completion for process 13406
[2022-02-04T01:20:26.838814Z] Waiting for completion finished for process 13406
Output and diagnostic info for process 13406 was saved into 'pid-13406-output.log'
[2022-02-04T01:20:26.841194Z] Waiting for completion for process 13406
[2022-02-04T01:20:26.841285Z] Waiting for completion finished for process 13406
Classfile /System/Volumes/Data/mesos/work_dir/slaves/c82600aa-2448-475c-8c08-6f02a5b3f3af-S22806/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/85c40bfb-9782-46c7-90ed-85b8d360aa74/runs/754600a9-2a5f-4382-8878-a63263c49a70/testoutput/test-support/jtreg_open_test_jdk_tier3/scratch/1/MethodParametersTarget.class
  Last modified Feb 4, 2022; size 502 bytes
  SHA-256 checksum 61f42fc76bec6b36b6ddb7ceb902f624061168b4fc00adc69da8ca7a18a2384b
  Compiled from "RetransformWithMethodParametersTest.java"
class MethodParametersTarget
  minor version: 0
  major version: 63
  flags: (0x0020) ACC_SUPER
  this_class: #7 // MethodParametersTarget
  super_class: #2 // java/lang/Object
  interfaces: 0, fields: 0, methods: 2, attributes: 1
Constant pool:
   #1 = Methodref #2.#3 // java/lang/Object."<init>":()V
   #2 = Class #4 // java/lang/Object
   #3 = NameAndType #5:#6 // "<init>":()V
   #4 = Utf8 java/lang/Object
   #5 = Utf8 <init>
   #6 = Utf8 ()V
   #7 = Class #8 // MethodParametersTarget
   #8 = Utf8 MethodParametersTarget
   #9 = Utf8 Code
  #10 = Utf8 LineNumberTable
  #11 = Utf8 LocalVariableTable
  #12 = Utf8 this
  #13 = Utf8 LMethodParametersTarget;
  #14 = Utf8 method1
  #15 = Utf8 (ILjava/lang/String;)V
  #16 = Utf8 intParam1
  #17 = Utf8 I
  #18 = Utf8 stringParam1
  #19 = Utf8 Ljava/lang/String;
  #20 = Utf8 MethodParameters
  #21 = Utf8 SourceFile
  #22 = Utf8 RetransformWithMethodParametersTest.java
{
  MethodParametersTarget();
    descriptor: ()V
    flags: (0x0000)
    Code:
      stack=1, locals=1, args_size=1
         0: aload_0
         1: invokespecial #1 // Method java/lang/Object."<init>":()V
         4: return
      LineNumberTable:
        line 59: 0
      LocalVariableTable:
        Start Length Slot Name Signature
            0 5 0 this LMethodParametersTarget;

  public void method1(int, java.lang.String);
    descriptor: (ILjava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=3, args_size=3
         0: return
      LineNumberTable:
        line 68: 0
      LocalVariableTable:
        Start Length Slot Name Signature
            0 1 0 this LMethodParametersTarget;
            0 1 1 intParam1 I
            0 1 2 stringParam1 Ljava/lang/String;
    MethodParameters:
      Name Flags
      intParam1
      stringParam1
}
SourceFile: "RetransformWithMethodParametersTest.java"
==========================================
expected -------------------
[2022-02-04T01:20:26.846186Z] Gathering output for process 13417
[2022-02-04T01:20:27.285856Z] Waiting for completion for process 13417
[2022-02-04T01:20:27.285970Z] Waiting for completion finished for process 13417
Output and diagnostic info for process 13417 was saved into 'pid-13417-output.log'
[2022-02-04T01:20:27.286346Z] Waiting for completion for process 13417
[2022-02-04T01:20:27.286374Z] Waiting for completion finished for process 13417
Classfile /System/Volumes/Data/mesos/work_dir/slaves/c82600aa-2448-475c-8c08-6f02a5b3f3af-S22806/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/85c40bfb-9782-46c7-90ed-85b8d360aa74/runs/754600a9-2a5f-4382-8878-a63263c49a70/testoutput/test-support/jtreg_open_test_jdk_tier3/scratch/1/MethodParametersTarget.class
  Last modified Feb 4, 2022; size 502 bytes
  SHA-256 checksum 0072be898071fb79abf0964ff53c5514aa3ba66726da5c4f81033f18acb8ce89
  Compiled from "RetransformWithMethodParametersTest.java"
class MethodParametersTarget
  minor version: 0
  major version: 63
  flags: (0x0020) ACC_SUPER
  this_class: #7 // MethodParametersTarget
  super_class: #2 // java/lang/Object
  interfaces: 0, fields: 0, methods: 2, attributes: 1
Constant pool:
   #1 = Methodref #2.#3 // java/lang/Object."<init>":()V
   #2 = Class #4 // java/lang/Object
   #3 = NameAndType #5:#6 // "<init>":()V
   #4 = Utf8 java/lang/Object
   #5 = Utf8 <init>
   #6 = Utf8 ()V
   #7 = Class #8 // MethodParametersTarget
   #8 = Utf8 MethodParametersTarget
   #9 = Utf8 Code
  #10 = Utf8 LineNumberTable
  #11 = Utf8 LocalVariableTable
  #12 = Utf8 this
  #13 = Utf8 LMethodParametersTarget;
  #14 = Utf8 method1
  #15 = Utf8 (ILjava/lang/String;)V
  #16 = Utf8 intParam1
  #17 = Utf8 I
  #18 = Utf8 stringParam1
  #19 = Utf8 Ljava/lang/String;
  #20 = Utf8 MethodParameters
  #21 = Utf8 SourceFile
  #22 = Utf8 RetransformWithMethodParametersTest.java
{
  public void method1(int, java.lang.String);
    descriptor: (ILjava/lang/String;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=3, args_size=3
         0: return
      LineNumberTable:
        line 68: 0
      LocalVariableTable:
        Start Length Slot Name Signature
            0 1 0 this LMethodParametersTarget;
            0 1 1 intParam1 I
            0 1 2 stringParam1 Ljava/lang/String;
    MethodParameters:
      Name Flags
      intParam1
      stringParam1

  MethodParametersTarget();
    descriptor: ()V
    flags: (0x0000)
    Code:
      stack=1, locals=1, args_size=1
         0: aload_0
         1: invokespecial #1 // Method java/lang/Object."<init>":()V
         4: return
      LineNumberTable:
        line 59: 0
      LocalVariableTable:
        Start Length Slot Name Signature
            0 5 0 this LMethodParametersTarget;
}
SourceFile: "RetransformWithMethodParametersTest.java"
==========================================
Debugging message: tearDown beginning
----------System.err:(15/1106)----------
ATestCaseScaffold$TestCaseScaffoldException: MethodParametersTarget did not match .class file
at ATestCaseScaffold.fail(ATestCaseScaffold.java:116)
at RetransformWithMethodParametersTest.compareClassBytes(RetransformWithMethodParametersTest.java:178)
at RetransformWithMethodParametersTest.doRunTest(RetransformWithMethodParametersTest.java:197)
at ATestCaseScaffold.runTest(ATestCaseScaffold.java:60)
at RetransformWithMethodParametersTest.main(RetransformWithMethodParametersTest.java:75)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:828)