Druid’s Auto-Reconnection Mechanism Explained

Druid is an open-source distributed real-time analysis database that features an automatic reconnect mechanism. This means that if the connection to the database is interrupted for any reason after it has been established, the system will automatically attempt to reconnect to ensure continuous and reliable data transfer.

The automatic reconnection mechanism of Druid mainly includes the following aspects:

1. Druid periodically checks the connection status with the database to promptly identify any disconnects.
2. Connection disconnect detection: When Druid detects that the connection to the database has been lost, it will immediately trigger the reconnection mechanism.
3. Reconnection attempt: The Druid will try to reestablish the connection with the database, typically using preconfigured connection parameters for the attempt.
4. Reconnection will restore the connection status to normal and allow Druid to resume data transmission operations.
5. Reconnection strategy: Druid typically employs an exponential backoff algorithm, where it waits a certain amount of time before attempting to reconnect again after each failed attempt. The wait time gradually increases to prevent an excessive number of reconnection requests from burdening the database.

In conclusion, Druid’s automatic reconnection mechanism is designed to ensure the reliability and continuity of data transmission, and to improve system stability and availability.