Frozen Chrome tab

[reda-alaoui]

We have multiple instances of the same webapp.

We have a single instance where DBSC is enabled. Many people on Windows, approximately once a day (often in the morning, aka first authentication of the day), cannot access the DBSC enabled instance. No issue on the instances with DBSC disabled. The steps:

• open a new tab
• enter the webapp instance url
• hit enter

The tab is visually stuck on the page loading:

Accessing the devtool is possible, but the latter is not contextualized to the target url. Therefore there is no way to open the DBSC debug panel or check the cookies. The only way to fix the issue is to go to general settings and remove all cookies. I tried to run Chrome in verbose mode, I didn't see anything useful.

On the server side, I didn't find traces of secure session skipped.

Would you have a clue for me?

[reda-alaoui]

I can also add that, in this situation, on the server side there isn't a single http request (DBSC related or not) received from Google Chrome.

[reda-alaoui]

The histogram while this happens:

[reda-alaoui]

This time, only restarting the browser unblocks the situation:

[drubery]

That sounds like some kind of deadlock where the DBSC refresh requests are themselves getting deferred. It could be https://crbug.com/495096658. A couple of questions:

• Do you have multiple sessions on your site?
• Do these users have anything set in chrome://flags?
• Can you capture a netlog? Open chrome://net-export/ and start recording before things lock up. The recorded data is somewhat sensitive, but you should be able to see DBSC deferrals there and what they're blocked on.