fix(threading): Handle threads with duplicate send times #10176
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Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
ChristophWurst
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bug
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feature:threading
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hamza221
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Sep 19, 2024
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/backport to stable3.7 |
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/backport to stable4.0 |
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A thread with two messages with identical sent_at result in a problematic situation. The backend will return both messages when listing the inbox. The front-end will de-duplicate and only show one of the two. At every browser-server sync, the picked duplicate will be replaced by the other message. At the next sync they are replaced again. Etc. This causes endless notifications.
I ran into this with a thread for an outgoing message that was replied to by the mail server. This seems to be the rare case where two messages in a thread have an identical send time because they were processed in the same second.
How to test
main: the two messages toggle.
here: only one of the messages is loaded and never replaced.
Note: I can't come up with a good way to find out which of the messages with identical send time are "newer". I just sort them by message id. It's a bit "random" semantically but keeps the sorting stable.