jmckenzie-dev commented on code in PR #3696:
URL: https://github.com/apache/cassandra/pull/3696#discussion_r1913811404
##########
build.xml:
##########
@@ -307,6 +307,72 @@
<equals arg1="${ant.java.version}" arg2="17"/>
</condition>
+ <resources id="_jvm21_arg_items">
+ <string>-Djdk.attach.allowAttachSelf=true</string>
+
+ <string>-XX:+UseZGC</string>
+ <string>-XX:+ZGenerational</string>
+
+ <!-- Temporary workaround for jamm having incorrect default
CompressedOops for JDK21 -->
+ <string>-XX:-UseCompressedOops</string>
Review Comment:
Just opened a PR for jamm that fixes this issues in JDK21 when ZGC is
present. Has 4 failing tests due to a test being hard-coded w/assumptions about
internal sizes in the JDK; I can take a look at that in a bit if it's a hard
blocker to merge. Link to PR: https://github.com/jbellis/jamm/pull/71
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