serviceability/jvmti/VMObjectAlloc/VMObjectAllocTest.java failed with "Exception: Number of allocation != 1"

The following test failed in the JDK20 CI:

serviceability/jvmti/VMObjectAlloc/VMObjectAllocTest.java

Here's a snippet from the log file:

VMObjectAlloc called for [B
VMObjectAlloc called for Ljava/lang/String;
VMObjectAlloc called for [B
----------System.err:(11/618)----------
java.lang.Exception: Number of allocation != 1
at VMObjectAllocTest.main(VMObjectAllocTest.java:50)
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:1596)

JavaTest Message: Test threw exception: java.lang.Exception: Number of allocation != 1
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.Exception: Number of allocation != 1
----------rerun:(43/6311)*----------