Rendering to PNG doesn't work, for example this link https://upload.wikimedia.org/wikipedia/commons/thumb/6/6e/Operation_Lavender_2017.svg/2048px-Operation_Lavender_2017.svg.png generates error "Our servers are currently under maintenance or experiencing a technical problem."
|Duplicate||None||T208123 HTTP 500 error trying to render an SVG file (2048x2048px; 2.9MB) to a large PNG thumbnail|
|Stalled||None||T193352 Update librsvg to ≥2.42.3 (2.44.10)|
|Resolved||None||T68672 SVG style element ignored if no type attribute is specified|
|Open||None||T216815 Upgrade Thumbor to Buster|
|Open||None||T212941 Investigate systemd hardening to replace Firejail for Thumbor|
|Resolved||fgiunchedi||T212946 Stream Thumbor logs to logstash|
|Resolved||Gilles||T187765 Replace the Nginx fronting Thumbor with Haproxy|
|Resolved||fgiunchedi||T204266 Backport prometheus haproxy exporter for Jessie|
|Resolved||jijiki||T220499 Export useful metrics from haproxy logs for Thumbor|
|Resolved||None||T216892 Santali font shown as square boxes in thumbnail version of a specific SVG file|
|Resolved||jijiki||T221562 Build Thumbor packages for buster|
I guess it's somewhat of a Performance-Team issue as trying to render a fairly large (by file size) SVG into a high resolution image takes too long
As Perhelion noted, this is most likely timeouts from unoptimized Gaussian blur in librsvg. librsvg 2.48.4 processes the 2048px thumbnail in about 8 seconds, while librsvg 2.40.16 (current prod version) takes 98 seconds: well over the 1 minute timeout. The Gaussian blur optimizations were added in librsvg 2.43 and 2.44.0.