private async Task PrunePoolAsync(CancellationToken cancellationToken)
{
bool enteredPool = false;
try
{
// if it takes too long to enter the pool, then the pool is fully utilized
// and we don't want to mess with it.
enteredPool = await _poolQueue.WaitAsync(TimeSpan.FromMilliseconds(20), cancellationToken).ConfigureAwait(false);
if (!enteredPool)
{
return;
}
_connectionHolder.Prune();
}
finally
{
if (enteredPool)
{
try
{
_poolQueue.Release();
}
catch
{
// log this... it's a bug
}
}
}
}