Connection leak observed when suspecting hosts
Description
While running a scenario to cause hosts to be repeatedly suspected (see for explanation) I observed the number of socket connections between my client and target cassandra nodes exceeded the max pool size and continued to grow.
For example, with the default pooling settings (2 core, 8 max) I saw 158 socket connections in the 'ESTABLISHED' state to a cassandra node after ~20 hours of runtime (and the number grows slowly over time).
Executing lsof -pn <pid> will reveal the open descriptors, including socket connections.
This was observed against the 2.0 branch, but assuming it exists on 2.0.8 as well.
Environment
Pull Requests
Activity
Ran a ~11 hour long test that created many timeouts, which created and closed ~22,000 socket connections. The number of opened sockets never grew above the expected size.
Reopening as I still need to validate this on the 2.1 branch, and there's a few more scenarios I want to try.
Validated against 2.0 and 2.1 branches. Identified a less severe connection leak which I logged for.
