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https://issues.apache.org/jira/browse/DAEMON-412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17183513#comment-17183513
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Mark Thomas commented on DAEMON-412:
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Just to (re-)confirm (tested with latest Apache Tomcat) that NMT does work when
starting in java mode. If an application doesn't start in Java mode that is a
separate, unrelated issue.
It is jvm mode where changes are required. I am working on this now.
> Tomcat started as windows service does not support Java Native Memory
> Tracking feature probably because of improper JVM initialization by Procrun
> -------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: DAEMON-412
> URL: https://issues.apache.org/jira/browse/DAEMON-412
> Project: Commons Daemon
> Issue Type: Bug
> Components: Procrun
> Environment: Windows generally (tested on Windows Server 2012 R2 but
> the problem occurs probably, like the user in the internet write, on every
> Windows version)
> Reporter: Artur Linhart
> Priority: Major
>
> In the case the user specifies some from the the NativeMemoryTracking
> parameters (see
> [https://docs.oracle.com/en/java/javase/11/vm/native-memory-tracking.html#GUID-0DB3B8D1-8D7D-447F-B6FF-15620103EE47
>
> |https://docs.oracle.com/en/java/javase/11/vm/native-memory-tracking.html#GUID-0DB3B8D1-8D7D-447F-B6FF-15620103EE47]
> ) like
> -XX:NativeMemoryTracking=summary
> in Windows service registry, restarts the service, so the option can be seen
> in the log file by the startup options (for example in Tomcat logs like
> catalina.log), then the Native memory tracking is still disabled and does not
> work. If you try with
> jcmd <pid> VM.native_memory summary
> to get the information about the native JVM memory in the tomcats JVM, the
> jcmd call fails with the message
> <pid>:
> Native memory tracking is not enabled
> and in the Tomcat's log file can be found following error message:
> Java HotSpot(TM) 64-Bit Server VM warning: Native Memory Tracking did not
> setup properly, using wrong launcher?
> The problem seems to be in the JVM launcher Procrun, which dies not
> initialize the JVM properly - as far as I have understood from this blog:
> [https://blogs.oracle.com/poonam/using-nmt-with-custom-jvm-launcher
> |https://blogs.oracle.com/poonam/using-nmt-with-custom-jvm-launcher]
> The Procrun.exe has to define some environment variable before the start of
> JVM, etc. to get the native memory tracking to work.
> Known workaround is the start of Tomcat from the command line, but this is no
> option in the productive environment, where you have to let the service run
> for longer time to collect the proper result and maybe also as some different
> user because of security concerns, then such option is simply out of possible
> scenarios. So the Tomcat service JVM cannot be in such circumstances tracked
> by NMT at all, what is the problem in the mission-critical applications.
> The Procrun should be modified in the way it enables the NMT in the windows
> service by the startup, by setting the environment variable
> NMT_LEVEL_<pid> to the value "detail" or "summary" (or "off" if unspecified)
> in the dependency on the specified or unspecified option of
> -XX:NativeMemoryTracking
> like done normally by java.exe
> Remark: Also change of the startup mode from "jvm" to "exe" or "java" does
> not help,. then the windows service does not start at all.
> See also the Tomcat bug
> [https://bz.apache.org/bugzilla/show_bug.cgi?id=63922|https://bz.apache.org/bugzilla/show_bug.cgi?id=63922]
> which has been qualified as invalid because the problem seems to be in is in
> PROCRUN.
> See also the bug [TOMEE-2738]
> This will probably affect every java app handled by the Procrun Daemon, if
> installed and started as Windows service, not only Tomcat.
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