ParaViewWeb with system tomcat package
The tomcat package that come inside the system package of a Linux distribution, has two limitation that needs to be managed in order to run ParaViewWeb on it. The first one is related to the fact that the system tomcat do not start in a run-level that has a server X which force or ParaView to not use the screen and therefore the GPU. For that special case, ParaView needs to be compiled with OSMesa. The second limitation is because of some security setting that prevent any web application to read/write anywhere on the disk or execute command lines.
Compiling ParaView with OSMesa
This will allow ParaView and therefore ParaViewWeb to work on an headless server. (No GPU, no server X)
apt-get install xutils-dev
mkdir OSMesa cd OSMesa mkdir install
wget ftp://ftp.freedesktop.org/pub/mesa/7.10.2/MesaLib-7.10.2.tar.gz tar xvfz MesaLib-7.10.2.tar.gz cd MesaLib-7.10.2
./configure --with-driver=xlib --disable-gallium --disable-egl --disable-glw --enable-gl-osmesa --prefix=../install make make install
BUILD_SHARED_LIBS ON CMAKE_BUILD_TYPE Debug CMAKE_INSTALL_PREFIX /home/seb/Kitware/Projects/ParaView4/install-osmesa PARAVIEW_BUILD_QT_GUI OFF PARAVIEW_ENABLE_PYTHON ON VTK_OPENGL_HAS_OSMESA ON
OSMESA_INCLUDE_DIR /home/seb/Kitware/Projects/OSMesa/install/include/ OSMESA_LIBRARY /home/seb/Kitware/Projects/OSMesa/install/lib/libOSMesa.so VTK_USE_OFFSCREEN ON VTK_USE_X OFF
OPENGL_INCLUDE_DIR OPENGL_gl_LIBRARY OPENGL_glu_LIBRARY OPENGL_xmesa_INCLUDE_DIR OPENGL_xmesa_INCLUDE_DIR-NOTFOUND
This explanation are based on an Ubuntu Linux distribution, so some explanation may need to be adjusted.