HTTPASYNC-86: fixed a race condition upon connection lease from the connection pool: in very rare  circumstances the main execution thread can get jammed for so long that the I/O dispatch thread succeeds in completing the request and releasing the connection while the main still is performing connection validation

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpasyncclient/trunk@1658694 13f79535-47bb-0310-9956-ffa450edef68
3 files changed