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Merge pull request #20123 from Sreekala-Gopakumar/46_1Rel
0.46.1 release note Draft
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‎doc/release-notes/0.46/0.46.1.md

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<!--
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* Copyright (c) 2024 IBM Corp. and others
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*
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* This program and the accompanying materials are made
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* available under the terms of the Eclipse Public License 2.0
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* which accompanies this distribution and is available at
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* https://www.eclipse.org/legal/epl-2.0/ or the Apache
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* License, Version 2.0 which accompanies this distribution and
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* is available at https://www.apache.org/licenses/LICENSE-2.0.
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*
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* This Source Code may also be made available under the
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* following Secondary Licenses when the conditions for such
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* availability set forth in the Eclipse Public License, v. 2.0
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* are satisfied: GNU General Public License, version 2 with
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* the GNU Classpath Exception [1] and GNU General Public
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* License, version 2 with the OpenJDK Assembly Exception [2].
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*
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* [1] https://www.gnu.org/software/classpath/license.html
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* [2] https://openjdk.org/legal/assembly-exception.html
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*
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* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
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-->
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# Eclipse OpenJ9 version 0.46.1 release notes
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These release notes support the [Eclipse OpenJ9&trade; 0.46.1 release plan](https://projects.eclipse.org/projects/technology.openj9/releases/0.46.1/plan).
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## Supported environments
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OpenJ9 release 0.46.1 supports OpenJDK 8, 11, 17, 21, and 22.
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All releases are tested against the OpenJ9 functional verification (FV) test suite, the OpenJDK test suites, and additional tests provided by Adoptium.
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To learn more about support for OpenJ9 releases, including OpenJDK levels and platform support, see [Supported environments](https://eclipse.org/openj9/docs/openj9_support/index.html).
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## Notable changes in this release
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The following table covers notable changes in v0.46.1. Further information about these changes can be found in the [user documentation](https://www.eclipse.org/openj9/docs/version0.46.1/).
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<table cellpadding="4" cellspacing="0" summary="" width="100%" rules="all" frame="border" border="1"><thead align="left">
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<tr>
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<th valign="bottom">Issue number</th>
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<th valign="bottom">Description</th>
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<th valign="bottom">Version / Platform</th>
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<th valign="bottom">Impact</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td valign="top">
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</td>
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<td valign="top"> </td>
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<td valign="top"> </td>
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<td valign="top"> </td>
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</tr>
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</tbody>
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</table>
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## Known issues
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The v0.46.1 release contains the following known issues and limitations:
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<table cellpadding="4" cellspacing="0" summary="" width="100%" rules="all" frame="border" border="1">
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<thead align="left">
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<tr>
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<th valign="bottom">Issue number</th>
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<th valign="bottom">Description</th>
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<th valign="bottom">Version / Platform</th>
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<th valign="bottom">Impact</th>
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<th valign="bottom">Workaround</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td valign="top"><a href="https://github.com/eclipse-openj9/openj9/pull/19833">#19833</a></td>
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<td valign="top">Class comparison for the shared cache might not detect the removal of method access modifiers. For example, a change of a method from public to package-private.</td>
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<td valign="top">All</td>
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<td valign="top">If you ran your application with the <tt>-XX:+ShareOrphans</tt> option, then recompiled classes after removing the method access modifier and reran with the <tt>-XX:+ShareOrphans</tt> option, the old version of the class might still be used.</td>
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<td valign="top">Remove the <tt>-XX:+ShareOrphans</tt> option and rerun.</td>
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</tr>
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<tr>
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<td valign="top"><a href="https://github.com/eclipse-openj9/openj9/pull/19833">#19833</a></td>
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<td valign="top"><tt>java.lang.StackTraceElement.getClassLoaderName()</tt> might return null for classes that are stored in the shared cache.</td>
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<td valign="top">All</td>
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<td valign="top">When the <tt>-XX:+ShareOrphans</tt> option is specified, <tt>java.lang.StackTraceElement.getClassLoaderName()</tt> might incorrectly return null on a class loader that has a name. If a class loader has a name, the correct behavior is to return the name.</td>
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<td valign="top">Remove the <tt>-XX:+ShareOrphans</tt> option and rerun.</td>
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</tr>
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<tr>
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<td valign="top"><a href="https://github.com/eclipse-openj9/openj9/issues/15011">#15011</a></td>
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<td valign="top">The default stack size for the main thread is a smaller platform-dependent value.</td>
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<td valign="top">All</td>
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<td valign="top">The main thread stack size was 1 MB in releases before 0.32. In the 0.32 release and later it was modified to a smaller
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platform-dependent value, the same value as the <tt>-Xmso</tt> setting. The 0.33 release increased the default <tt>-Xmso</tt> stack size
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on x64 platforms, but builds with OpenJDK 17 and later also require more stack space to run. These changes might result in a
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<tt>java.lang.StackOverflowError: operating system stack overflow</tt>.</td>
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<td valign="top">Use <tt>-Xmso</tt> to set the default stack size. See the default value by using <tt>-verbose:sizes</tt>.</td>
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</tr>
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<tr>
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<td valign="top"><a href="https://github.com/eclipse-openj9/openj9/issues/14803">#14803</a></td>
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<td valign="top">Using the <tt>-XX:+ShowHiddenFrames</tt> option in an OpenJ9 release that is built with OpenJDK 18 and later causes errors.</td>
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<td valign="top">All platforms</td>
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<td valign="top">Wrong exception might be thrown when using the Reflection API.</td>
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<td valign="top">Avoid using the <tt>-XX:+ShowHiddenFrames</tt> option with OpenJDK 18 and later.</td>
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</tr>
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<tr>
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<td valign="top"><a href="https://github.com/eclipse-openj9/openj9/issues/13767">#13767</a></td>
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<td valign="top">Compressed references mode is not available.</td>
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<td valign="top">Apple silicon macOS</td>
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<td valign="top">You can use only the large heap (non-compressed references) mode.</td>
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<td valign="top">None</td>
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</tr>
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</tbody>
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</table>
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## Other changes
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A full commit history for 0.46.1 release is available at [Eclipse OpenJ9 v0.46.1](https://github.com/eclipse-openj9/openj9/releases/tag/openj9-0.46.1).

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