maoling

@eolivelli BTW, where is Jenkins these days? without Jenkins unit cases build, sometimes cannot make sure whether one patch has changed the behavior

> I had the assumption of this should be implemented on server side. There's no guarantee of somebody not deleting the node after getData call. - Yes, it is. Implementing...

@ztzg @eolivelli @anmolnar @nkalmar This is a serious bug which's related with the consistency, any of your guys have a cycle to review it? @Hinterwaeldlers

@Hinterwaeldlers. Very sorry for our late, the inconsistency issue always has the highest priority. As you see, our reviewer has noticed this PR, I will nudge this PR

Oops, I'm looking

@Hinterwaeldlers - The unit test did not work anymore, please use the `Junit5` jupiter.api - Please reopen your origin PRs again branch-3.5, branch-3.6, branch-3.7 (Notice master and branch-3.7 use `Junit5`,...

@anmolnar @Randgalt Yep, we should not break the compatibility, I have deleted the changes about the semantics of TTL and focus on the performance issue by a force update. PTAL.

@Randgalt - Great review work and insight. I take a close look at the patch you provide, learn a lot from it. - I don't insist on this improvement, not...

@TyqITstudent are you still working on this issue?can we move on?or let me pick it up(smirk)?

- @kezhuw Great work. Sorry for our late.Thanks for your contribution. - Commit to the following branches: [master ](https://github.com/apache/zookeeper/tree/master) [branch-3.8](https://github.com/apache/zookeeper/tree/branch-3.8) [branch-3.7](https://github.com/apache/zookeeper/tree/branch-3.7) , except [branch-3.6](https://github.com/apache/zookeeper/tree/branch-3.6)