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Login session bug on Beta Commons
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Description

While testing 3D file support, the Multimedia and QA teams have run into an issue. A weird session bug on Beta logs the user out (apparently due to session expiration). Attempts to log back in *appear* successful but when the user tries to upload via the UploadWizard again, it says they're still logged out.

Steps involved:

a.) the issue seems much more prominent when there are multiple logged-in browser tabs on Beta Commons

b.) Closing all tabs, logging in and logging out, still doesn't work sometimes

c.) Issue is generally most apparent when a tab with the UploadWizard is left open, and the user attempts to return to it.

Event Timeline

Tgr added subscribers: Krenair, Tgr.

Session unreliability is a long-standing issue on beta (see e.g. T172560: "Loss of session data" on Beta Cluster; there was another task that I can't find now where @Krenair tracked it down to redis replication failures) although that should not be affected by number of tabs or usage of UploadWizard.

Session unreliability is a long-standing issue on beta (see e.g. T172560: "Loss of session data" on Beta Cluster; there was another task that I can't find now where @Krenair tracked it down to redis replication failures)

https://phabricator.wikimedia.org/T172560#3551337 -> https://phabricator.wikimedia.org/T173646 ?