Provides a default listener when no listener is set #3658
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Provides a default listener when no listener is set. And add parameters to know the exact event source.
Sometimes we need to manage and monitor the database as a server and adjust the database parameters when it happens.
For example, deleteFilesOnDisconnect is automatically set to true on the target node when the cluster is created. This can easily trigger the deletion of data files when the database is closed, resulting in the loss of data files and tables. We can correct the parameters through the listener