4 ms·
Ask HN: 'Unknown or expired link'
Why does the 'more' link at the bottom give 'Unknown or expired link' at certain times?
- ColinWright 13y agoThis has been discussed many, many times. Try searching for it in the search box at the bottom of each page. However, short answer: The ordering of items on a page can change, so when you open the page the ordering is created, and continuation pages are generated by closures in the code. These closures are garbage collected after a while, so if you don't access one in a timely fashion, by the time you ask for it, it might no longer be there. Garbage collections will happen more often when the system is more heavily loaded, so the time limit is effectively shorter. Now, here is some background reading: https://hn.algolia.com/?q=unknown+expired#!/story/forever/0/unknown%20expired https://hn.algolia.com/?q=unknown+expired#!/story/forever/0/... You could have looked that up for yourself. Did you?
- iamdanfox 13y agoThe overall ranking is updated every few minutes. Each front-page has a different `?fnid=xiJqLAhmD8VrsD2p21gUKn` parameter to ensure page 2 displays that ranking. Clicking the `more` link after HN has updated shows you the expired link message. I guess this means they don't have to store all the old rankings, but it does seem curious not to allow people to view old rankings.