Why is my Tomcat JDBC data source showing a memory leak and how can I fix it?
- Mary-Kate OlsenOriginal
- 2024-11-07 19:52:02554browse
Tomcat JDBC Data Source Memory Leak Issue
Your Tomcat application log indicates a potential memory leak related to the JDBC data source. This issue arises when the web application registers a JDBC driver but fails to unregister it upon its shutdown.
JDBC Driver Unregistration
To address the first error, the JDBC driver has been forcefully unregistered to prevent a memory leak. However, this suggests that the destroy-method in your
MySQL Statement Cancellation Timer Thread
The second error pertains to a thread named "MySQL Statement Cancellation Timer" that was started but not stopped by the web application. This thread is typically used to cancel pending database operations. The error message suggests that the thread was not properly terminated, which could lead to a memory leak.
Potential Solution
To resolve the issue with the MySQL Statement Cancellation Timer thread, try the following:
- Ensure that all threads created by your web application are properly closed or terminated upon shutdown.
- Verify that the data source configuration is correct and that the connection pool is being properly managed.
- Consider placing the MySQL Connector/Driver JAR file in the Tomcat
directory instead of within the WAR file. This can ensure that the driver is not reloaded and recreated multiple times during deployment, which could cause thread leaks.
Please refer to the following resources for additional information:
- [JDBC Driver Placement](https://tomcat.apache.org/tomcat-7.0-doc/jndi-resources-howto.html#JDBC_Driver_Placement)
- [Configuring Tomcat with MySQL](https://tomcat.apache.org/tomcat-7.0-doc/tomcat-jdbc.html#Configuring_Tomcat_to_Connect_with_MySQL)
The above is the detailed content of Why is my Tomcat JDBC data source showing a memory leak and how can I fix it?. For more information, please follow other related articles on the PHP Chinese website!