All queries in all databases are suspended, but the db server can be connected

Recently, we have had several instances where the database service is not responding.

The specific situation is: all clients can still establish new connections with the database, but when any query operation is performed on any table, the query will continue forever, neither timeout nor return results.

The attachment is the error log, this problem first appeared around 2022-12-16 8:20:00

Do you have any clues on this issue, we are currently at a loss