I agree, but this needs to be addressed in a Java 9 way, and that's not through endorsed libraries which are not supported anymore. We'll need a jigsaw module for xerces. Btw, is there an issue raised on OpenJDK ? They could maybe cache the value in a static variable ?
2017-10-11 16:06 GMT+02:00 Daniel Kulp <dk...@apache.org>: > > The PROBLEM with the in-JDK version of the DOM is that just creating a new > empty document involved a call to System.getProperty(…) which is a > synchronized call. The Apache xerces version does not have that problem. > Thus, by removing the xerces jar, performance of certain uses cases will > drop with high concurrency. Unfortunately, CXF is one of those use cases. > > > Dan > > > > On Oct 11, 2017, at 2:00 PM, Guillaume Nodet <gno...@apache.org> wrote: > > > > The point that makes me raise this problem is that the karaf default > > distribution uses the Apache versions of xerces and xalan. Fwiw, the > > latest xerces release is from 2011 and the latest xalan from 2014, so > > they're not the most active. In particular, xalan latest release does > not > > implement jaxp 1.4. > > > > One additional point is that those libraries stuff is broken on Java 9, > so > > one option would be to remove it alltogether which bring us much closer > to > > Java 9 support ;-) Seriously, I'm not sure I want to spend too much time > > allowing pluggability for specs/implementations while the only real > > implementation provider is the JDK itself. That's really a lot of work > for > > no real benefit. > > > > In addition, the default distribution still install some "legacy" > features > > such as aries-blueprint, shell-compat, etc... > > > > So here's a list of propositions for 4.2: > > * remove all libraries for specs / impls from apache-karaf distro > > * remove support for endorsed / ext libraries in the <library> element > > and wherever used > > * remove aries-blueprint and shell-compat from default distro > > * remove a few features from the karaf-minimal distro. I'm not sure > which > > one exactly, but I think we should get the zip under 10 Mb. Maybe only > > keeping jaas, shell, feature, ssh, bundle, config, deployer and log, also > > removing equinox / logback bundles... > > > > Thoughts ? > > > > -- > > ------------------------ > > Guillaume Nodet > > -- > Daniel Kulp > dk...@apache.org - http://dankulp.com/blog > Talend Community Coder - http://coders.talend.com > > -- ------------------------ Guillaume Nodet
