AggregateError: Request failed / Block is not in the block requests

When running npm run dev with the latest master, uncommented all test files, and port 8090, some files don’t render, and console contains lots of these errors:

• AggregateError: Request failed
  • inner error is that response is undefined at https://github.com/geotiffjs/geotiff.js/blob/c49e8b62cedb84b2557b4d49b6abe0675196a5bf/src/source/blockedsource.js#L190
• Block 27 is not in the block requests

[rogerscg]

Has there been any progress on this? This is a pretty basic use case that seems to fail most of the time.

[rowanwins]

I’ve been looking at this a little recently as I was working on requesting tiles from a COG. It seems like there is an issue with the blockCache. I think what’s happening is that an id is present in the cache at the start of the fetch function, but by the end when it’s time to retrieve the block from the blockCache it’s been pushed out of the cache by more recent arrivals, and so when it comes time to grab all the relevant blocks from the cache occasionally something is no longer available. https://github.com/geotiffjs/geotiff.js/blob/4de2c3deb2e751809afada6546330462b9406ae6/src/source/blockedsource.js#L141.

As an easy fix I bumped up the cacheSize from 100 to 1000 and all my errors went away, however there is probably a smarter way to manage things rather than relying on a magic number.