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https://issues.apache.org/jira/browse/GEODE-9476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17522987#comment-17522987
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Darrel Schneider edited comment on GEODE-9476 at 4/28/22 7:40 PM:
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this is an issue for geode 1.15 because the setAccessible call is made to a jdk
class. For these stats to work on jdk17 our server and locator process need
"sun.management" opened to the unnamed module.
This was done for 1.15 see: GEODE-10263
was (Author: dschneider):
this is an issue for geode 1.15 because the setAccessible call is made to a jdk
class. For these stats to work on jdk17 our server and locator process need
"sun.management" opened to the unnamed module.
> VMStats processCpuTime, fdLimit, and fdsOpen will always be zero on java 16
> and later
> -------------------------------------------------------------------------------------
>
> Key: GEODE-9476
> URL: https://issues.apache.org/jira/browse/GEODE-9476
> Project: Geode
> Issue Type: Bug
> Components: statistics
> Reporter: Darrel Schneider
> Priority: Major
> Labels: Java16, Java17
>
> VMStats processCpuTime, fdLimit, and fdsOpen will always be zero on java 16
> and later.
> This is because it calls Method.setAccessible which is not allowed under
> normal conditions starting with java 16 (see:
> https://softwaregarden.dev/en/posts/new-java/illegal-access-in-java-16).
> A workaround for this bug is to start the jvm with --illegal-access=permit
> The setAccessible call is in the static initializer for:
> org.apache.geode.internal.stats50.VMStats50
> It turns out the following works for calling processCpuTime:
> {code:java}
> OperatingSystemMXBean osBean =
> ManagementFactory.getOperatingSystemMXBean();
> com.sun.management.OperatingSystemMXBean sunBean =
> (com.sun.management.OperatingSystemMXBean) osBean;
> System.out.println("getProcessCpuTime=" +
> sunBean.getProcessCpuTime());
> {code}
> so we can get rid of the setAccessible call
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