Apache ZooKeeper 3.9 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Apache ZooKeeper 3.9 is actively supported.
3.9.5 latest release
Support timeline
Official dates from the Apache ZooKeeper release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 19 Jul 2023 | — |
| End of life (scheduled) | — | not announced |
| Latest release | 3.9.5 · 5 Mar 2026 | current |
Frequently asked questions
When does Apache ZooKeeper 3.9 reach end of life?
No end-of-life date has been announced for Apache ZooKeeper 3.9 yet.
Is Apache ZooKeeper 3.9 still supported?
Yes. Apache ZooKeeper 3.9 is currently maintained. Latest release: 3.9.5, published 5 Mar 2026.
What happens when Apache ZooKeeper 3.9 reaches end of life?
Security fixes stop. After — this branch receives no further updates under standard support.
How long do I have to upgrade from Apache ZooKeeper 3.9?
No end-of-life date has been announced yet.