Fenix: FNX-5492 ⁃ [Bug] Sync automatically after a short while

[sv-ohorvath]

Steps to reproduce

1. Sign in on 2 devices.
2. Add a few bookmarks on one of them.
3. Wait to sync automatically.
   
   
   
   1. Expected behavior
      
      AFAIK on Fennec, the new bookmarks are synced automatically.
   
   
   2. Actual behavior
      
      No automatic sync after 1 hour or more since new bookmarks were added.
   
   
   3. Device information
   
   

• Android devices: Pixel, Mi 4i (Android 5.0.2)
• Fenix version: 4/29

[grigoryk]

This is part of the a-c sync manager, aka "heuristic syncing". I'll look for a relevant issue.

[vesta0]

@grigoryk did you find a relevant issue? Do we want to increase the sync frequency?

[sv-ohorvath]

This has an impact on Sending tabs, which you expect to happen almost instantly.

[vesta0]

@sarentz will open a new bug for a workaround to this issue.

[grigoryk]

@sv-ohorvath sending/receiving tabs is no longer technically part of Sync like it was in Fennec, so this doesn't have impact on tabs. We have a separate mechanism to receive tabs; currently we poll for new tabs every 15 minutes, and soon we'll be landing push support which should make receiving tabs nearly-instant.

Also, we already sync on a schedule, every four hours. And now that https://github.com/mozilla-mobile/fenix/pull/2955 landed, we'll sync on app coming into foreground. So I'd say we should be in an OK place with regards to "data liveliness".

Given all of the above, I don't think this should be an MVP blocker.

[ekager]

Sounds like we can close this issue?

[pocmo]

AC issue: https://github.com/mozilla-mobile/android-components/issues/2727

[vesta0]

Closing this issue since this no longer impacts Send Tab + we will be implementing Sync Manager soon.