What should be done when the Tomcat connection pool is full?
When the Tomcat connection pool is full, the following methods can be considered:
- Increase the size of the connection pool: You can adjust the configuration file of Tomcat to increase the maximum number of connections in the connection pool. In the server.xml file of Tomcat, you can find configuration related to the connection pool, such as maxConnections and maxThreads, and increase them accordingly.
- Optimize the application: Check for any unfreed connections in the application, such as not properly closing database connections. Make sure to release them promptly after use so that the connection pool can be reused.
- Adjust the connection timeout: Check the timeout setting for the connection pool. If a connection remains idle for a long time, you can reduce the maximum idle time of the connection appropriately to free up some idle connections.
- Switching to a higher-performance database connection pool: If the above measures are not effective, consider replacing the default Tomcat connection pool with a higher-performance one, such as HikariCP or Apache Commons DBCP. These connection pools usually have better performance and more configuration options, making them better suited for high-concurrency scenarios.
- Consider upgrading hardware or increasing the number of servers: If the connection pool is full due to the high concurrency of the application, consider upgrading server hardware or adding more servers to meet higher concurrency demands.
It is necessary to choose the appropriate method based on specific circumstances, such as trying a single method alone or considering a combination of multiple methods to solve the issue of a full connection pool.
