In an attempt to fix the stability of of Travis builds, I have set Maven -Xmx512m for all active GeoServer branches.
Builds that passed were using over 1.6 GB peak Maven heap: add on four concurrent forked -Xmx512m test JVMs and you can see that we were dangerously close to the 4 GB container RAM limit. Java 8 server VMs default to 1/4 RAM as default max heap; on Travis infrastructure this might have been 16 GB! Because we now fork javac, we do not need as much heap for Maven itself. Hopefully setting -Xmx512m will give us some breathing space.
Unlike earlier releases, the current Travis configuration respects env/MAVEN_OPTS so I used it instead of ~/.mavenrc (although I tested both).
Kind regards,
--
Ben Caradoc-Davies <ben@anonymised.com>
Director
Transient Software Limited <http://transient.nz/>
New Zealand