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From Rory O'Donnell <>
Subject JDK 17 is now in Rampdown Phase One
Date Mon, 14 Jun 2021 09:49:13 GMT

Hi Stefan/Jaikiran,

*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

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