The following test failed in the JDK20 CI:

jdk/jfr/event/compiler/TestJitRestart.java

Here's a snippet from the log file:

#section:main
----------messages:(5/501)----------
command: main -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+SegmentedCodeCache -XX:-UseLargePages jdk.jfr.event.compiler.TestJitRestart
reason: User specified action: run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:+SegmentedCodeCache -XX:-UseLargePages jdk.jfr.event.compiler.TestJitRestart
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules jdk.jfr,jdk.management.jfr
elapsed time (seconds): 2.618
----------configuration:(3/54)----------
Boot Layer
  add modules: jdk.jfr jdk.management.jfr

----------System.out:(87/3716)----------
[1.618s][warning][codecache] CodeHeap 'non-profiled nmethods' is full. Compiler has been disabled.
[1.618s][warning][codecache] Try increasing the code heap size using -XX:NonProfiledCodeHeapSize=
CodeHeap 'non-profiled nmethods': size=120028Kb used=665Kb max_used=665Kb free=119362Kb
 bounds [0x00007f98f01e9000, 0x00007f98f7720000, 0x00007f98f7720000]
CodeHeap 'profiled nmethods': size=120028Kb used=1866Kb max_used=1866Kb free=118161Kb
 bounds [0x00007f98e8720000, 0x00007f98efc57000, 0x00007f98efc57000]
CodeHeap 'non-nmethods': size=5704Kb used=1677Kb max_used=1703Kb free=4027Kb
 bounds [0x00007f98efc57000, 0x00007f98efec7000, 0x00007f98f01e9000]
 total_blobs=1792 nmethods=974 adapters=737
 compilation: disabled (not enough contiguous free space left)
              stopped_count=1, restarted_count=0
 full_count=1
# events:1
jdk.CodeCacheFull {
  startTime = 18:07:31.272 (2022-07-21)
  codeBlobType = "CodeHeap 'non-profiled nmethods'"
  startAddress = 0x7F98F01E9000
  commitedTopAddress = 0x7F98F7720000
  reservedTopAddress = 0x7F98F7720000
  entryCount = 351
  methodCount = 351
  adaptorCount = 0
  unallocatedCapacity = 116.6 MB
  fullCount = 1
  codeCacheMaxCapacity = 240.0 MB
  eventThread = "MainThread" (javaThreadId = 22)
}


[2.370s][warning][codecache] CodeHeap 'profiled nmethods' is full. Compiler has been disabled.
[2.370s][warning][codecache] Try increasing the code heap size using -XX:ProfiledCodeHeapSize=
CodeHeap 'non-profiled nmethods': size=120028Kb used=684Kb max_used=702Kb free=119343Kb
 bounds [0x00007f98f01e9000, 0x00007f98f7720000, 0x00007f98f7720000]
CodeHeap 'profiled nmethods': size=120028Kb used=549Kb max_used=1866Kb free=119478Kb
 bounds [0x00007f98e8720000, 0x00007f98efc57000, 0x00007f98efc57000]
CodeHeap 'non-nmethods': size=5704Kb used=1709Kb max_used=1795Kb free=3994Kb
 bounds [0x00007f98efc57000, 0x00007f98efec7000, 0x00007f98f01e9000]
 total_blobs=1382 nmethods=521 adapters=781
 compilation: disabled (not enough contiguous free space left)
              stopped_count=2, restarted_count=1
 full_count=2
# events:1
jdk.CodeCacheFull {
  startTime = 18:07:32.024 (2022-07-21)
  codeBlobType = "CodeHeap 'profiled nmethods'"
  startAddress = 0x7F98E8720000
  commitedTopAddress = 0x7F98EFC57000
  reservedTopAddress = 0x7F98EFC57000
  entryCount = 218
  methodCount = 218
  adaptorCount = 0
  unallocatedCapacity = 116.7 MB
  fullCount = 1
  codeCacheMaxCapacity = 240.0 MB
  eventThread = "MainThread" (javaThreadId = 22)
}


[2.426s][warning][codecache] CodeHeap 'non-nmethods' is full. Compiler has been disabled.
[2.426s][warning][codecache] Try increasing the code heap size using -XX:NonNMethodCodeHeapSize=
CodeHeap 'non-profiled nmethods': size=120028Kb used=684Kb max_used=702Kb free=119343Kb
 bounds [0x00007f98f01e9000, 0x00007f98f7720000, 0x00007f98f7720000]
CodeHeap 'profiled nmethods': size=120028Kb used=569Kb max_used=1866Kb free=119458Kb
 bounds [0x00007f98e8720000, 0x00007f98efc57000, 0x00007f98efc57000]
CodeHeap 'non-nmethods': size=5704Kb used=1709Kb max_used=1795Kb free=3994Kb
 bounds [0x00007f98efc57000, 0x00007f98f01e9000, 0x00007f98f01e9000]
 total_blobs=1383 nmethods=522 adapters=781
 compilation: disabled (not enough contiguous free space left)
              stopped_count=2, restarted_count=1
 full_count=3
# events:1
jdk.CodeCacheFull {
  startTime = 18:07:32.080 (2022-07-21)
  codeBlobType = "CodeHeap 'non-nmethods'"
  startAddress = 0x7F98EFC57000
  commitedTopAddress = 0x7F98F01E9000
  reservedTopAddress = 0x7F98F01E9000
  entryCount = 861
  methodCount = 0
  adaptorCount = 781
  unallocatedCapacity = 3.9 MB
  fullCount = 1
  codeCacheMaxCapacity = 240.0 MB
  eventThread = "MainThread" (javaThreadId = 22)
}


----------System.err:(19/1497)----------
Java HotSpot(TM) 64-Bit Server VM warning: CodeHeap 'non-profiled nmethods' is full. Compiler has been disabled.
Java HotSpot(TM) 64-Bit Server VM warning: Try increasing the code heap size using -XX:NonProfiledCodeHeapSize=
Java HotSpot(TM) 64-Bit Server VM warning: CodeHeap 'profiled nmethods' is full. Compiler has been disabled.
Java HotSpot(TM) 64-Bit Server VM warning: Try increasing the code heap size using -XX:ProfiledCodeHeapSize=
Java HotSpot(TM) 64-Bit Server VM warning: CodeHeap 'non-nmethods' is full. Compiler has been disabled.
Java HotSpot(TM) 64-Bit Server VM warning: Try increasing the code heap size using -XX:NonNMethodCodeHeapSize=
java.lang.RuntimeException: No JIT restart event found: expected true, was false
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertTrue(Asserts.java:486)
at jdk.jfr.event.compiler.TestJitRestart.main(TestJitRestart.java:61)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:1589)

JavaTest Message: Test threw exception: java.lang.RuntimeException: No JIT restart event found: expected true, was false
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: No JIT restart event found: expected true, was false
----------rerun:(41/6658)*----------