Page History

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OpenJDK 21 updates will be delivered on the same established quarterly cycle used by Oracle i.e. "the third Tuesday closest to the 17th day of January, April, July and October."

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The release date follows the schedule of Oracle Critical Patch Updates as this is the date embargoed security fixes can be published.

OpenJDK 21.0.39

• Tuesday, April 16 2024 October 21 2025 GA; OpenJDK 21.0.3 released 9 released (tag: jdk-21.0.39-ga)

OpenJDK 21.0.410

• Wednesday, February 28 2024September 3 2025: jdk21u-dev repo open (tag: 21.0.410+0)
• Tuesday, April 30 2024November 05 2025: First merge from jdk21u-dev to jdk21u (tag: 21.0.410+1)
• Tuesday, May 28 2024December 2 2025: Rampdown; last merge from jdk21u-dev to jdk21u
• Tuesday, June 25 2024December 30 2025: Last tag before code freeze
• Tuesday, July 16 2024 January 20 2026 GA; OpenJDK 21.0.4 10 released (tag: jdk-21.0.410-ga)

OpenJDK 21.0.511

• Wednesday, May 29 2024December 3 2025: jdk21u-dev repo open (tag: 21.0.511+0)
• Tuesday, July 30 2024February 3 2026: First merge from jdk21u-dev to jdk21u (tag: 21.0.511+1)
• Tuesday, August 27 2024March 3 2026: Rampdown; : last merge from jdk21u-dev to jdk21u
• Tuesday, September 24 2024March 31 2026: Last tag before code freeze
• Tuesday, October 15 2024 April 21 2026 GA; OpenJDK 21.0.5 11 released (tag: jdk-21.0.511-ga)

OpenJDK 21.0.12

• Wednesday, March 4 2026: jdk21u-dev repo open (tag: 21.0.12+0)

Latest Release

Latest GA release:21.0.39

• 21.0.39+9 10 (GA), April 16th 2024October 21st 2025, [Release] [Tag] [Binaries]

Older releases can be found in the archive.

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Critical Fix Requests

[Unapproved requests]

Filters for Release 21.0.9

Changes new in 21.0.

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9 excluding test changes: Differences to OpenJDK 21.0.8.

21.0.39/all: OpenJDK but not OracleJDK: Changes in OpenJDK 21.0.3 9 that are not in OracleJDK 21.0.9.

21.0.9/all: OracleJDK but not OpenJDK: Changes backported to OracleJDK 21.0.3-21.0.9 but not in OpenJDK 21.0.9.

21.0.39/new: OracleJDK but not OpenJDK: Changes new in OracleJDK 21.0.3 9 but not in OpenJDK 21.0.39

Filters for Release 21.0.10

Changes new in 21.0.10 excluding test changes: Differences to OpenJDK 21.0.9.

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21.0.410/all: OpenJDK but not OracleJDK: Changes in OpenJDK 21.0.4 10 that are not in OracleJDK 21.0.410.

21.0.410/all: OracleJDK but not OpenJDK: Changes backported to OracleJDK 21.0.43-21.0.3 but 10 but not in OpenJDK 21.0.410.

21.0.410/new: OracleJDK but not OpenJDK: Changes new in OracleJDK 21.0.4 10 but not in OpenJDK 21.0.410

Filters for Release 21.0.11

Changes new in 21.0.11 excluding test changes tbd: Differences to OpenJDK 21.0.

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10.

21.0.511/all: OpenJDK but not OracleJDK: Changes in OpenJDK 21.0.5 11 that are not in OracleJDK 21.0.511.

21.0.511/all: OracleJDK but not OpenJDK: Changes backported to OracleJDK 21.0.3-21.0.5 11 but not in OpenJDK 21.0.511.

21.0.511/new: OracleJDK but not OpenJDK: Changes new in OracleJDK 21.0.5 11 but not in OpenJDK 21.0.511

Common jdk21u JBS labels

The above filters exclude issues that are marked with the following labels:

• jdk21u-na Change does not apply to open jdk21u. In general, this is a change done by Oracle for their build or test infrastructure, for their own delivery or in their tests not open sourced. Any other change might not be deemed appropriate for OpenJDK 21u and get labelled that way.
• jdk21u-defer-next Change is generally acceptable, but should go into the next JDK 21 update release. I.e. 21.0.4 is currently collecting fixes in jdk21u-dev, but the proposed change should get into 21.0.5 (the next release) instead.
• jdk21u-todo Changes Oracle backported to older releases that are not backported to open jdk21u.  We mostly need this tag to make the "all" filters more efficient.