Brave Sync tries to update indefinitely 4 times a second with no progress

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1

Description of the issue:
How can this issue be reproduced?

  1. Install Brave on Windows 10.
  2. Enroll into the sync chain providing a passphrase.
  3. Wait for some time - Brave is not synced.
  4. Open brave://sync-internals/#
  5. Only part of items are synced: Bookmarks, Themes, Device Info, Priority Preferences. Others are not synced (0, Running).
  6. In the log the following messages are repeated 4 times a second indefinitely (see Additional information):

Expected result:

Brave is synced.

Brave Version( check About Brave):

Brave is up to date

Brave 1.79.118 (Official Build) (64-bit)

Chromium: 137.0.7151.61

Additional Information:

In the log the following messages are repeated 4 times a second indefinitely (tokens were manually edited):

Initial GetUpdates
Reason: NEWLY_SUPPORTED_DATATYPE
{
  "client_status": {
    "is_sync_feature_enabled": true
  },
  "debug_info": {
    "cryptographer_has_pending_keys": false,
    "cryptographer_ready": true,
    "events_dropped": false
  },
  "get_updates": {
    "caller_info": {
      "notifications_enabled": false
    },
    "fetch_folders": true,
    "from_progress_marker": [
      {
        "data_type_id": "37702",
        "token": "nIKcAAAAAA=="
      },
...
      {
        "data_type_id": "47745",
        "token": "tO1kAAAAAA=="
      }
    ],
    "get_updates_origin": "NEWLY_SUPPORTED_DATATYPE",
    "need_encryption_key": false
  },
  "protocol_version": "99",
  "share": "FF99079AEC7ED934FD FF31323A342C4DC7 @brave.com",
  "store_birthday": "1"
}

6/1/2025, 3:42:57 PM GetUpdates Response
Received 0 update(s). Some updates remain.

{
  "client_command": {
    "max_commit_batch_size": "90",
    "set_sync_poll_interval": "30"
  },
  "error_code": "SUCCESS",
  "get_updates": {
    "changes_remaining": "1",
    "new_progress_marker": [
      {
        "data_type_id": "37702",
        "token": "nIKctAAAAAA=="
      },
...
      {
        "data_type_id": "47745",
        "token": "tOXkAAAAAA=="
      }
    ]
  },
  "store_birthday": "1"
}
2

@Mattches

OP has good, detailed report of Brave Sync

  • some data, failure
  • some data, success
3

@jot-gone-borough what other devices are on the Sync chain that you’re adding the Win10 device to? Additionally, have you tried leaving the Sync chain and re-adding it?

1 Like
4

There are several windows 11 brave, android brave, mac brave in this chain. All of them worked ok before this happened. I tried leaving the chain and re-adding it.

5

@jot-gone-borough apologies – I’m just getting back from PTO. Can you confirm that this issue is still occurring? If so I will go ahead and escalate it to the Sync team for further review.

Also just for clarity, it is only your Win10 device that isn’t Syncing with the rest of the devices on the chain right?

6

The sync is still not working. I have only one win10 device. Other devices sync ok in the chain.

1 Like
7

Thank you for the clarification. Reaching out to Sync team now to take a look.