How to find the "bad" bookmark that leads to a sync failure in Firefox with Nextcloud Bookmarks?

[johanneskastl]

Hi all,

is there a way to find out, which of my bookmarks is causing the sync to fail?

I am syncing from Firefox to my Nextcloud Bookmarks. The sync starts but fails with this error:

["Could not add bookmark"]} Nextcloud API error: {"status":"error","data":["Could not add bookmark"]} Nextcloud API error: {"status":"error","data":["Could not add bookmark"]} | Last synchronized: 0 seconds ago

I create a backup of my bookmarks, and delete half of them. Now the sync is successful.

So, other than importing the backup, only deleting half of the half that I deleted previously, and repeating this for ever, how can I find out which of the bookmarks is causing the sync to fail?

The debug log looks like this, it does not indicate which bookmark failed:

2024-11-08T07:31:02.387Z Executed 8 actions from 426 actions
2024-11-08T07:31:02.388Z Executed 9 actions from 426 actions
2024-11-08T07:31:02.463Z Receiving response for PUT https://<redacted>/index.php/apps/bookmarks/public/rest/v2/bookmark/71
2024-11-08T07:31:02.465Z Executed 10 actions from 426 actions
2024-11-08T07:31:02.465Z Syncing failed with Nextcloud API error:
{"status":"error","data":["Could not add bookmark"]}
Nextcloud API error:
{"status":"error","data":["Could not add bookmark"]}

I already skimmed for "funny" characters in the names and renamed the obvious ones. But to no avail (and I have a lot of bookmarks...).

Thanks in advance!

Kind Regards,
Johannes

[marcelklehr]

Hey Johannes,

the PUT should be associated with an UPDATE action, which should contain the Bookmark that is being updated in the log entry. Since this seems to happen in the first 10 actions being executed, you should be able to find the offending Bookmark in the logs leading up to this point. If you like you can send me the log privately via email.

[johanneskastl]

OK, I think I got the relations right. But I find no reason, why such a Bookmark should cause issues?

This is the line for the offending bookmark:

           - #1340;31[Kitsch trifft Armut](http://www.spiegel.de/kultur/gesellschaft/0,1518,714571,00.html) parentId: 31

[marcelklehr]

Mmmh, the IDs are not the same, though. 1340 is the id of the last bookmark, 71 the one of the offending bookmark

[marcelklehr]

Looking deeper into this, though, the API error stems from this method: https://github.com/nextcloud/bookmarks/blob/484d6c26ea8edcb590572d88dccbdf8c826c32ba/lib/Controller/BookmarkController.php#L427-L457 which means it can't have stemmed from the PUT 71, it must have been from a CREATE action, which would be a POST request

[johanneskastl]

Mmmh, the IDs are not the same, though. 1340 is the id of the last bookmark, 71 the one of the offending bookmark

Sorry, I took a newer debug log and use that as an example.

There are at least 100 lines between the last CREATE.

The last PUT is a dozen lines before:

2024-11-09T18:01:04.203Z Receiving response for POST https://<redacted>/index.php/apps/bookmarks/public/rest/v2/bookmark

This does not shed much light, unfortunately...

[marcelklehr]

Can you send me a redacted log perhaps? That would make things easier

[marcelklehr]

I was able to replicate this issue, it doesn't seem to be due to the URL. Can you try emptying the trash in Nextcloud Bookmarks?

[johanneskastl]

No problem, I am not sure if it is related to the "bad bookmark" issue or not, so I pointed it out.

Basically I would have assumed that there can only be one folder with a certain name, but apparently there can be multiple. Which confuses me and might confuse Floccus and/or Nextcloud Bookmarks?

[marcelklehr]

It can confuse floccus in certain situations, yes. The outcome would likely be a floccus error, though, not a Nextcloud Bookmarks error as in your case. 🤔

[johanneskastl]

OK, I noticed something.

I am gradually moving folders from the Bookmark menu (which is not synced) to Other Bookmarks, which is being synced.

Some of the folders cause an error. Upon retry I find duplicate folders in Nextcloud Bookmarks, apparently one for each failed sync. Moving the folder back (in Firefox), removing all of the "duplicate folders" and then re-trying the sync normally succeeds. Of course that is tedious.

I also noticed that sometimes a folder is being moved, the sync is successful, but the next sync (or one of the next syncs) errors out. Not sure why that is.

[marcelklehr]

Do you have an error message for me?

[johanneskastl]

I am trying to nail it down to a "bad" bookmark and will send a log to you.