Session file invalid

[yunzhiyan]

When my session file fails, how can I judge it and retrieve authentication?

[ilyalatt]

The default session store overwrites the session file using a backup. So the session should not be corrupted. It can be staled however. One example is low SeqNo. The client attempts to repeat a request a few times incrementing SeqNo. Usually it is enough.
Serialization logic can be found here. It can be changed in the future.