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Catching up messages after hub + link-bot downtime #11

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opened 2018-06-24 02:25:52 +00:00 by mappu04 · 0 comments
mappu04 commented 2018-06-24 02:25:52 +00:00
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If the hub and link-bot goes down for whatever reason, when they come back up, the linkbot will (A) reconnect to the hub, and (B) suddenly receive all TG messages at once.

This means that

  • there is a race condition, if the hub connection has not completed before the link bot wants to post something to it; leading to Couldn't sync message '...' because: Not connected error messages posted back in TG; and
  • if there were more than ~5 posts by a single user, they would hit a hub-side rate limit (same as #6).
If the hub and link-bot goes down for whatever reason, when they come back up, the linkbot will (A) reconnect to the hub, and (B) suddenly receive all TG messages at once. This means that - there is a race condition, if the hub connection has not completed before the link bot wants to post something to it; leading to `Couldn't sync message '...' because: Not connected` error messages posted back in TG; and - if there were more than ~5 posts by a single user, they would hit a hub-side rate limit (same as #6).
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Reference: code.ivysaur.me/nmdc-telegramfrontend#11
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