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https://issues.apache.org/jira/browse/CASSANDRA-14883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16835874#comment-16835874
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Blake Eggleston edited comment on CASSANDRA-14883 at 5/8/19 8:12 PM:
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[~avermeerbergen] do you see this log message (logged at INFO) when starting
your Cassandra 3.x install with OpenJ9?
{quote}Cannot initialize un-mmaper. (Are you using a non-Oracle JVM?) Compacted
data files will not be removed promptly. Consider using an Oracle JVM or using
standard disk access mode
{quote}
was (Author: bdeggleston):
[~avermeerbergen] do you see this message when starting your Cassandra 3.x
install with OpenJ9?
{quote}Cannot initialize un-mmaper. (Are you using a non-Oracle JVM?) Compacted
data files will not be removed promptly. Consider using an Oracle JVM or using
standard disk access mode{quote}
> Let Cassandra support the new JVM, Eclipse Openj9.
> --------------------------------------------------
>
> Key: CASSANDRA-14883
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14883
> Project: Cassandra
> Issue Type: Improvement
> Components: Packaging
> Environment: jdk8u192-b12_openj9-0.11.0
> cassandra 4.0.0_beta_20181109_build
> Reporter: Lee Sangboo
> Priority: Normal
> Fix For: 4.0.x
>
> Attachments: jamm-0.3.2.jar, jamm.zip
>
>
> Cassandra does not currently support the new JVM, Eclipse Openj9. In internal
> testing, Openj9 outperforms Hotspot. I have deployed a modified jamm library
> that has a problem with the current startup, but when I started Cassandra, I
> got a log message saying "Non-Oracle JVM detected." Some features, such as
> unimported compact SSTables, may not work as intended "If there is no
> problem, I would also like to delete the above message.
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