[SPARK-5529][CORE]Add expireDeadHosts in HeartbeatReceiver#5793

alexrovner wants to merge 1 commit intoapache:branch-1.3apache/spark:branch-1.3from

alexrovner:SPARK-5529-backport-1.3-v2alexrovner/spark:SPARK-5529-backport-1.3-v2Copy head branch name to clipboard