Thunderbird freezes during sync of O365 Calendars

[gerardcanal]

Your environment

TbSync version: 4.7
EAS-4-TBSync Version: 4.7
Thunderbird version: 115.3.1
OS: Ubuntu 20.04

Expected behavior

Thunderbird should not freeze during calendar sync.

Actual behavior

Thunderbird keeps freezing when TbSync is syncing. This has happened since Thunerdbird 9x. I experience the same issue in another computer with same OS and accounts. I tried reinstalling TbSync and removing the account with no luck.

I only have an O365 account synced, so unsure if this is on TBSync or on the EAS plugin.

Steps to reproduce

Wait for the sync timeout to happen so that the calendar syncs, or perform a manual sync from the interface. It does not seem to always happen (sometimes manual sync is immediate).

When it happens, I see that one of the calendars says it's "Synchronizing (0/1)". The status is "Waiting for changes", with a countdown. It freezes during this time, also when "Waiting for acknowledgement of local changes".

Debug log sent over email.

[gerardcanal]

Hi @Micke3rd,
Where can I find that those are the latest supported versions?

As far as I can see on the Thunderbird addons page and in the manifest, the latest available version is 4.7, which states it supports until TB 115.*. Therefore, I understand that my environment should work. Even so, this has been happening for a while though (surely before 102 was released), but it seems to be worse lately.

I am unsure if the issue belongs here or in EAS-4-TBsync (as I don't know if the freeze comes from the UI or the sync plugin), this could be moved there if more suitable. The issue may be related to jobisoft/EAS-4-TbSync#245.

[Micke3rd]

sorry, you are absolutely right about the versions. I only looked at the latest release here on the site.
I use TB under Windows, where the behavior you describe does not occur.

[jobisoft]

TbSync is trying to be asynchronously, so it surprises me that it can freeze your computer. Servers may not respond directly which forces TbSync to wait for the answer, but it should not "freeze" your computer.

Could you give more details?

[gerardcanal]

Hi @jobisoft,
Thanks for the reply. To clarify, what freezes is Thunderbird's GUI, not the whole computer. What happens is that Thunderbird becomes unresponsive every certain time. When this happens, the UI does not update (doesn't show anything if I am writing a new email), clicks don't seem to get registered. After some seconds, it seems to refresh and register some of the keys/clicks.

For instance, the "new message" button will not do anything until some seconds later, and Ubuntu displays the "Thunderbird is not responding" popup. Every time this happens, TBSync is synchronising, though it does not happen every time TBSync syncs (I believe it's only the times when the long wait happens).

I have recorded a video, and I sent it over email.