Jean-Baptiste Onofré commented on KARAF-5628:

Fair enough. I will do the improvements.

> Corrupt gc.log due to unseparated VM settings
> ---------------------------------------------
>                 Key: KARAF-5628
>                 URL: https://issues.apache.org/jira/browse/KARAF-5628
>             Project: Karaf
>          Issue Type: Bug
>          Components: karaf-core
>            Reporter: Rico Neubauer
>            Assignee: Jean-Baptiste Onofré
>            Priority: Major
> The VM properties used for the start, stop, status and client scripts all use 
> one common configuration of the VM properties, like Xmx and GC settings.
> This has one particular issue when activating the gc.log (-Xloggc:gc.log with 
> Oracle-VM): Invoking e.g. status while Karaf is running, uses the same 
> settings, thus points to the same file and corrupts it with NUL values (see 
> here for details: 
> [Stackoverflow|[https://stackoverflow.com/questions/8353401/garbage-collector-log-loggc-file-rotation-with-logrotate-does-not-work-properl]]
>  ).
> I would like to request the possibility to configure the VM properties for 
> starting the instance independently from the maintenance scripts - due to the 
> issue and also since e.g. running status with lots of heap (if instance is 
> configured to it) is unneeded.
> Even making it broader, I think it would also make sense to be able to 
> configure the settings completely, since currently some things are hard-coded 
> in the scripts, like the _-Xdum_p and _-Xlp_ settings  for AIX, where I 
> personally would like to configure it to _-Xdump:heap:events=gpf,opts=PHD_, 
> which is currently not possible using the configuration only. Also especially 
> for AIX, there is _LDR_CNTRL=MAXDATA=0xB0000000@DSA_, which might not be 
> desired when running with heaps larger than 3GB.
> If you agree on a separation, I would make a proposal as PR. Please let me 
> know.

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