The following issues are reported regarding headings in documentation comments.
For a general background information, see this message to jdk-dev@ojn.
   https://mail.openjdk.java.net/pipermail/jdk-dev/2019-March/002671.html

open/src/java.management/share/classes/java/lang/management/ManagementFactory.java:70: Note: missing heading <h2>
 * <h3><a id="MXBean">Platform MXBeans</a></h3>
   ^
open/src/java.management/share/classes/java/lang/management/MemoryMXBean.java:52: Note: missing heading <h2>
 * <h3> Memory </h3>
   ^
open/src/java.management/share/classes/java/lang/management/MonitorInfo.java:35: Note: missing heading <h2>
 * <h3>MXBean Mapping</h3>
   ^
open/src/java.management/share/classes/java/lang/management/ThreadMXBean.java:52: Note: missing heading <h2>
 * <h3>Thread ID</h3>
   ^
open/src/java.management/share/classes/java/lang/management/ThreadInfo.java:37: Note: missing heading <h2>
 * <h3>General thread information</h3>
   ^
open/src/java.management/share/classes/java/lang/management/LockInfo.java:45: Note: missing heading <h2>
 * <h3><a id="MappedType">MXBean Mapping</a></h3>
   ^
open/src/java.management/share/classes/java/lang/management/MemoryUsage.java:105: Note: missing heading <h2>
 * <h3>MXBean Mapping</h3>
   ^
open/src/java.management/share/classes/java/lang/management/MemoryPoolMXBean.java:52: Note: missing heading <h2>
 * <h3>Memory Type</h3>
   ^
open/src/java.management/share/classes/javax/management/NotificationBroadcaster.java:36: Note: missing heading <h2>
 * <h3>Notification dispatch</h3>
   ^
open/src/java.management/share/classes/javax/management/MXBean.java:82: Note: missing heading <h2>
    <h3 id="MXBean-spec">MXBean specification</h3>
    ^
open/src/java.management/share/classes/javax/management/NotificationEmitter.java:35: Note: missing heading <h2>
 * <h3>Notification dispatch</h3>
   ^





open/src/jdk.management/share/classes/com/sun/management/GcInfo.java:59: Note: missing heading <h2>
 * <h3>MXBean Mapping</h3>
   ^