This week's book giveaway is in the OCP forum. We're giving away four copies of OCP Oracle Certified Professional Java SE 11 Developer Practice Tests and have Scott Selikoff and Jeanne Boyarsky on-line! See this thread for details.
We have recently migrated to Tomcat 7.0.26,I would like to see number of database connection objects created by WebApplication which is running in Tomcat 7.0.26.
can we monitor those on Tomcat app-manager or server-status screens? or do we have any other tools or plugins to do the same ?
Ideally, a web application is not creating connections, but instead obtaining them from a database connection pool that was constructed and managed by the application server. Since this pooling manager is a plug-in resource, the exact characteristics and enumerable characteristics of that pool will vary depending on which pooler is being used. For the default, the Apache DBCP pooler is used. You should be able to use JMX to monitor it.
Some people, when well-known sources tell them that fire will burn them, don't put their hands in the fire.
Some people, being skeptical, will put their hands in the fire, get burned, and learn not to put their hands in the fire.
And some people, believing that they know better than well-known sources, will claim it's a lie, put their hands in the fire, and continue to scream it's a lie even as their hands burn down to charred stumps.