Very large diagrams do not render at all

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What you are seeing

Very large diagrams do not render at all.

#Why it happens

Diagram source under 4,300 encoded characters is rendered through a GET URL; larger source is posted instead. Source too large to encode at all is dropped with only a console warning.

#What to do

Split a very large diagram into smaller ones, or use a browser-rendered type (draw.io, Excalidraw, BPMN, DMN) which does not go through the rendering service at all.

#Settings involved

Setting

Where

What it does

Admin / project / site settings

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Diagram (gadget configuration). Diagram

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Diagram (gadget configuration). Language

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#Limits that apply here

Limit

Value

What happens

Diagram title length

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The Title input is capped at 50 characters. Titles are used verbatim as attachment filenames with no de-duplication or sanitisation, so two diagrams with the same title produce two identically named a

Browse page size

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Each JQL page requests 12 issues and the list reveals 12 rows at a time; Show more loads the next batch. (The shared hook's own default is 50; the Diagrams page overrides it to 12.).

Concurrent diagram previews on the browse pa

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Diagram content is downloaded one attachment at a time through a throttle, so thumbnails on a busy site fill in progressively rather than all at once.

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