Add event subscriber for transaction isolation level #18227
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Master is 19 now. Please merge this early. |
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icewind1991
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Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>
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The documentation https://docs.nextcloud.com/server/latest/admin_manual/installation/system_requirements.html still says to set the installation to read-committed. Please change. Thanks |
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Which is still what we do 🤷♂️ |
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Fix #17947
Tricky one. Take a long running task (e.g. uploading a file). Connection is lost from sql server.
ReconnectWrapperwill handle the disconnect and reconnect. TransactionLevel is correct for the first connection but not for the reconnected one because setTransactionLevel works per connection.This change is probably danger.
setTransactionIsolation(parent::TRANSACTION_READ_COMMITTED);is the same as calling$this->connect()from the constructor.Master: A new
DB\Connectioninstance will connect immediately to the sql server (triggered bysetTransactionIsolation.This PR: Connection to sql server is established on demand.
postConnectwill run before the requested query.Don't have a reliable way to reproduce it yet. Keeping a process open with xdebug and kill the sql connection works sometimes ;)