JDK-8277795 is changing some of the internal locking of the JNDI provider to use Lock/Condition instead of synchronized/wait.
This should have the side effect of improving the behaviour of the JNDI/LDAP stack when running in a virtual thread.
It would be good to verify whether this is sufficient to prevent pinning the carrier thread, or whether there remain synchronized blocks/methods that should be updated to use j.u.c.l.Lock.