Filip Nowak created DAEMON-323:
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Summary: 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 Nowak
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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