Mailing List Archive

JDK 17 is now in Rampdown Phase One
Hi Uwe & Dawid,

*Per the JDK 17 schedule , we are in Rampdown Phase One [1].*

**Please advise if you find any issues while testing the latest Early
Access builds**.**

* Schedule:
o *2021/06/10       Rampdown Phase One*
o 2021/07/15        Rampdown Phase Two
o 2021/08/05        Initial Release Candidate
o 2021/08/19        Final Release Candidate
o 2021/09/14        General Availability

The overall feature set is frozen. No further JEPs will be targeted to
this release.


* Important JEPs have been integrated – Attention Required!
* *JEP 411: **Deprecate the Security Manager for
o Deprecate, for removal, most Security Manager related classes
and methods.
o Warning message at startup if the Security Manager is enabled on
the command line.
o Warning message at run time if a Java application or library
installs a Security Manager dynamically.
o Deprecation is in concert with the legacy Applet API (JEP 398).
* *JEP 407: **Remove RMI Activation*<>
o Removal the Remote Method Invocation (RMI) Activation mechanism,
while preserving the rest of RMI.
o It was deprecated for removal by JEP
385<>in Java SE 15.
* *JEP 403: **Strongly Encapsulate JDK
o Strongly encapsulate all internal elements of the JDK, except
for critical internal APIs such as /sun.misc.Unsafe/.
o It will no longer be possible to relax the strong encapsulation
of internal elements via a single command-line option.

* Other features integrated in JDK 17:
o *JEP 306: **Restore Always-Strict Floating-Point
o JEP 356: Enhanced Pseudo-Random Number
o JEP 382: New macOS Rendering
o JEP 391: macOS/AArch64 Port<>
o JEP 398: Deprecate the Applet API for
o *JEP 406: **Pattern Matching for switch
o JEP 409: Sealed Classes<>
o JEP 410: Remove the Experimental AOT and JIT
o JEP 412: Foreign Function & Memory API
o *JEP 414: **Vector API (Second
o *JEP 415: **Context-Specific Deserialization

*OpenJDK 17 Early Access build 26 is available at

* These early-access , open-source builds are provided under the
o GNU General Public License, version 2, with the Classpath

* Release Notes are available at<>

* Changes in recent builds that maybe of interest:
* *Build 26:*
o JDK-8268241: deprecate JVM TI Heap functions 1.0
o JDK-8266846: Add java.time.InstantSource
o JDK-8248268: Support KWP in addition to KW
o JDK-8204686: Dynamic parallel reference processing support for
Parallel GC
o JDK-8259530: Generated docs contain MIT/GPL-licenced works
without reproducing the licence [*Reported by Apache Maven*]
o JDK-8266766: Arrays of types that cannot be an annotation member
do not yield exceptions [*Reported by ByteBuddy*]
o JDK-8266598: Exception values for
AnnotationTypeMismatchException are not always informative
[*Reported by ByteBuddy*]
* *Build 25*
o JDK-8266653: Change update mode for JDK rpm/deb installers as it
breaks "yum update" for JDK11+
o JDK-8263202: Update Hebrew/Indonesian/Yiddish ISO 639 language
codes to current
o JDK-8229517: Support for optional asynchronous/buffered logging
o JDK-8182043: Access to Windows Large Icons

*OpenJDK 18 Early Access build 1 is now available at
*** <>

* These early-access , open-source builds are provided under the
o GNU General Public License, version 2, with the Classpath
Exception <>
* Issues addressed in this build - here

*Other Topics which might be of Interest: *


* Java Cryptographic Roadmap [2] has been updated.
* Inside Java Newscast #6 [3]
o a closer look at the list of JEPs of JDK 17 as well as the
development process
* Inside Java Newscast #7 [4]
o discusses in greater detail `pattern matching for switch`,
previewed in JDK 17



Rgds, Rory O'Donnell
Quality Engineering Manager
Oracle EMEA, Dublin, Ireland