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https://issues.apache.org/jira/browse/CASSANDRA-19001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17800879#comment-17800879
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Paulo Motta commented on CASSANDRA-19001:
-----------------------------------------
Added [this
commit|https://github.com/pauloricardomg/cassandra/commit/cdc4124873f2b29c4d42e3265a9c7f408bcd98c4]
to
[pauloricardomg/19001-5.0-patch|https://github.com/apache/cassandra/compare/trunk...pauloricardomg:cassandra:19001-5.0-patch]
to fail "nodetool sjk" with a nicer message when a JDK is not found:
"nodetool sjk jps" output with JDK17:
{noformat}
$ bin/nodetool sjk jps
28270 org.apache.cassandra.tools.NodeTool -p 7199 sjk jps
{noformat}
"nodetool sjk jps" output with JRE17:
{noformat}
$ docker run --rm -it cassandra-test:5.0-19001 nodetool sjk jps | cat | head
-n10
ERROR: JDK not detected and nodetool sjk requires JDK to work.
{noformat}
> Check whether the startup warnings for unknown modules represent a legit
> problem or cosmetic issue
> --------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-19001
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19001
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Other
> Reporter: Ekaterina Dimitrova
> Assignee: Ekaterina Dimitrova
> Priority: Normal
> Fix For: 5.0-rc, 5.0.x, 5.x
>
>
> During the 5.0 alpha 2 release
> [vote|https://lists.apache.org/thread/lt3x0obr5cpbcydf5490pj6b2q0mz5zr],
> [~paulo] raised the following concerns:
> {code:java}
> Launched a tarball-based 5.0-alpha2 container on top of
> "eclipse-temurin:17-jre-focal" and the server starts up fine, can run
> nodetool and cqlsh.
> I got these seemingly harmless JDK17 warnings during startup and when
> running nodetool (no warnings on JDK11):
> WARNING: Unknown module: jdk.attach specified to --add-exports
> WARNING: Unknown module: jdk.compiler specified to --add-exports
> WARNING: Unknown module: jdk.compiler specified to --add-opens
> WARNING: A terminally deprecated method in java.lang.System has been called
> WARNING: System::setSecurityManager has been called by
> org.apache.cassandra.security.ThreadAwareSecurityManager
> (file:/opt/cassandra/lib/apache-cassandra-5.0-alpha2-SNAPSHOT.jar)
> WARNING: Please consider reporting this to the maintainers of
> org.apache.cassandra.security.ThreadAwareSecurityManager
> WARNING: System::setSecurityManager will be removed in a future release
> Anybody knows if these warnings are legit/expected ? We can create
> follow-up tickets if needed.
> $ java --version
> openjdk 17.0.9 2023-10-17
> OpenJDK Runtime Environment Temurin-17.0.9+9 (build 17.0.9+9)
> OpenJDK 64-Bit Server VM Temurin-17.0.9+9 (build 17.0.9+9, mixed mode,
> sharing)
> {code}
> {code:java}
> Clarification: - When running nodetool only the "Unknown module" warnings
> show up. All warnings show up during startup.{code}
> We need to verify whether this presents a real problem in the features where
> those modules are expected to be used, or if it is a false alarm.
>
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