Question on Oracle's Connection Cache

Question

Hi,
I am using JSP's Javabean to connect to the database using Oracle's OracleConnectionCacheImpl for Connection Cache.
My question is if I should synchronize the methods to initialize the Cache and to return the Connection object using the the cache? Thanks.

Answer 1

I am facing problems with using Oracle's Implicit Connection cache and it returns 'null' connection from OracleDataSource when the maxLimit is reached and what I noticed is the OracleConnectionCache doesn't seem to return cached connections between running multi-thread requests.
Scenario to produce the problem:
1) Create a sample JSP file that uses 2 connections and close the 2 connections in 'finally' clause (print the active and idle connections before and after the datasource.getConnection()). Make sure you set the connectionCachingEnabled to true on your datasource.
2) Define the maxLimit and other connectioncache properties in your context.xml file
3) Run the test plan using JMeter and you can see that the connection becomes 'null' even though you are closing the connections right after its being used.