Fat jar with AppCDS
yumin.qi at gmail.com
Wed Apr 25 06:14:00 UTC 2018
Thanks! I will try your tool.
On Tue, Apr 24, 2018 at 5:42 PM, Volker Simonis <volker.simonis at gmail.com>
> Hi Yumin,
> your right with your observation. For applications like Tomcat or
> Eclipse you can currently usually only share about 20%-30% of the
> application classes, even with AppCDS.
> To overcome this problem I wrote a small tool called "cl4cds" (i.e.
> class list for CDS) which can be used to generate a classlist out of
> the "Xlog:class+load" output. Unfortunately this is currently an
> extra, off-line step which should obviously be integrated right into
> HotSpot. But for the time being it allows you to take advantage of
> AppCDS for custom classloaders and share a much bigger amount of
> classes even for application server scenarios.
>  https://github.com/simonis/cl4cds
> On Tue, Apr 24, 2018 at 2:49 AM, yumin qi <yumin.qi at gmail.com> wrote:
> > Hi,Ioi
> > There are some applications with fat jar, that is, like web jars, are
> > loaded by its own class loaders, are not dumped when run with current
> > AppCDS can dump the jars in path and loaded by App class loader, but it
> > does not dump the classes loaded by the class loader "in the jars", which
> > are loaded in runtime.
> > Do you have any plan to work on this issue? The classes loaded during
> > runtime are NOT generated classes, they are just designed this way and
> > stored in other jar files(fat).
> > We are working on the issue, so if you have recommendation or you
> > worked on it please let me know.
> > Thanks
> > Yumin
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