Red Hat build of OpenJDK 21 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Red Hat build of OpenJDK 21 is actively supported. It reaches end of life on 31 Dec 2029.
1,183 days of security support left
21.0.9.0.10-1 latest release
47% of this branch's supported lifetime has elapsed — 14 Nov 2023 → 31 Dec 2029.
Check your versionjava -version
Support timeline
Official dates from the Red Hat build of OpenJDK release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 14 Nov 2023 | 2y 11mo ago |
| Support ends | 31 Dec 2029 | in 3y 3mo |
| Latest release | 21.0.9.0.10-1 · 17 Oct 2025 | current |
How much runway a newer branch buys
Moving to Red Hat build of OpenJDK 25 extends security support by about 365 days.
| Branch | End of life | Days left | vs 21 |
|---|---|---|---|
| Red Hat build of OpenJDK 25 | 31 Dec 2030 | 1,548 | +365 days |
| Red Hat build of OpenJDK 21 | 31 Dec 2029 | 1,183 | this branch |
| Red Hat build of OpenJDK 17 | 31 Dec 2027 | 452 | -731 days |
| Red Hat build of OpenJDK 8 | 30 Nov 2026 | 56 | -1,127 days |
Frequently asked questions
When does Red Hat build of OpenJDK 21 reach end of life?
Red Hat build of OpenJDK 21 reaches end of life on 31 Dec 2029 — 1,183 days from now. After that date it receives no security fixes.
Is Red Hat build of OpenJDK 21 still supported?
Yes. Red Hat build of OpenJDK 21 is currently maintained. Latest release: 21.0.9.0.10-1, published 17 Oct 2025.
What happens when Red Hat build of OpenJDK 21 reaches end of life?
Security fixes stop. After 31 Dec 2029 this branch receives no further updates under standard support.
How long do I have to upgrade from Red Hat build of OpenJDK 21?
1,183 days. Moving to Red Hat build of OpenJDK 25 instead buys roughly 365 more days of security support.