What threads do the Oracle JDBC drivers create?
The drivers create a number of different threads, but only on an as-needed basis. They do not create the threads unless your code makes use of the feature that depends on the thread. All of these threads are daemon threads. Statement timeout thread. This thread is created if you execute any statement with a timeout. Only one thread is created no matter how many statements or connections. This thread lasts the lifetime of the VM. Implicit Connection Cache timeout thread. Used to enforce timeouts on the connection cache, and is enabled when at least one timeout property on the connection cache is enabled. There is one thread per connection cache. It lasts the lifetime of that connection cache. Fast Connection Failover Event handler thread. Listener thread to receive HA events from RAC. Started only when FCF is enabled. There is one thread per connection cache. It lasts the lifetime of that connection cache. FCF worker thread Processes UP/DOWN events.
