[QGIS-Developer] issues in QGIS Server 2,18

[Giovanni Manghi]

Hi all,
now that 2.18 is LTR I guess that many have also updated their QGIS
Server installation to this release. Problem is that I see a few
issues in 2.18 and would like to have gsome feedback from others.

*) slower: it seems this version is slower compared to 2.14, at least
for some specific request like WFS GetFeatures. See for example:

https://issues.qgis.org/issues/18249#note-1

where in the same condition (same server, same postgis datasource of
around ~25000 polygons) 2.18 is about 30 seconds slower than 2.14.


*) At some point in 2.18 development -in the print composer,
properties of a legend- the "none" value for the "map" option was
removed. This option (together with "auto update" unchecked) allowed
to do GetPrint requests where a legend always shown the same fixed
entries regardless of the layers being requested. Moreover now the
layers legend (from a GetPrint) frequently shows "?" instead of the
correct legend. Not sure if the two things are related.


*) Crashes on GetPrint: adding some type of elements in print
composers (like html text boxes) caused QGIS Server to crash when
doing a GetPrint *if* the *headless* server didn't had a fake xserver
installed. Now in 2.18 this happens even if QGIS Server is installed
on a Desktop OS, unless installing the fake x server. Not sure is
related but this now affects also Windows machines where a GetPrint
requests (of a layout with one of this problematic elements) make
always QGIS Server crash. This was not the case for 2.14.


thanks in advance for the feedback

cheers

-- Giovanni --