, which was originally pushed to JDK 14, has been backported to 11.0.9 and 11,0.10-oracle. Those backports changed JMM_VERSION from 0x20020000 (JDK 10) to 0x20030000 (JDK 14), which introduced an incompatibility that was overlooked in the backport CSRs
(11.0.10-oracle). JDK 11 users checking for JMM_VERSION == 0x20020000 will find 0x2003000 instead and possibly abort. The issue was first noticed as part of reviewing a backport of
to JDK 8: see the Description in the corresponding CSR
For the reasons detailed there, JMM_VERSION in JDK 11 should be reverted to 0x20020000 (JDK 10), and the @since javadoc tag for com.sun.management.ThreadMXBean.getCurrentThreadAllocatedBytes should be changed from 14 to 11.0.9.