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https://issues.apache.org/jira/browse/DAEMON-323?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Thomas closed DAEMON-323.
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> A variable substitution for JVM arguments
> -----------------------------------------
>
> Key: DAEMON-323
> URL: https://issues.apache.org/jira/browse/DAEMON-323
> Project: Commons Daemon
> Issue Type: Improvement
> Components: Procrun
> Reporter: Filip N
> Priority: Major
>
> Server's java application are recommended (required?) to log JVM's garbage
> collector (gc) activity.
> Unfortunately JVM does not append entries to existing gc log but truncates
> it.
> It is often addressed by making gc log file name unique so that consecutive
> application (JVM) starts do not overwrite their gc log files, e.g. by adding
> timestamp to GC log file name. Sample JVM arguments for unix:
> {code}
> -Xmx2G -XX:+PrintGCDetails -XX:+PrintGCDateStamps
> -Xloggc:"./log/server_gc_`date '%Y%m%d_%H%M%S'`.log"
> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=10M
> {code}
> (in Windows, timestamp can be get from {{wmic os get LocalDateTime}})
> This approach do not seem to be possible with procrun at the moment
> (probably with jsvc as well, besides running JVM from a batch).
> Please add a support for optional custom variable (with fixed or configured
> name) which is substituted to current timestamp by Prunsrv at JVM startup.
> Similar variables for PID, hostname etc could also be useful.
> PS: Java 8 has support for {{%p}} variable resolved to PID.
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