Gray_code_element

Tuesday, May 4, 2010

Tomcat Database Connection Pool

I have been doing some development work on Tomcat and I am told that my connection pool is getting stale after a while. We will see if the following link , or this one, or something else about JNDI will help. Other ideas are to establish a cleanup/reaper schedule that will close connections in the pool, if they are inactive beyond a certain period.

Check validationQuery.

validationQuery="SELECT 1"

jdbc:mysql://hostname/mydb?autoReconnect=true

Connection Pooling

Connection Reaper class:

JBCD and DBUtils

IBM Discussion on Stale Connections

Handling a Stale Connection

To view the log, go to tomcat6\logs\catalina.out It has all the system.out.println() entries in it.

Arduino HTTP Request

This worked on April 11, 2025 for an Arduino R4 using the Arduino Desktop IDE on a Windows 11 computer.  Make Sure that the Arduino IDE is u...