tree eebd54e339d42784fec487c0201b8e22dbf060b8
parent 765d7f616844ed947549465ce991b9ee71b4c190
author Mariia Mykhailova <mariia@apache.org> 1468021824 -0700
committer Julia Wang <juliaw@apache.org> 1481594277 -0800

[REEF-1430] Validate Task Message Send failure => FailedEvaluator Event

This change:
 * updates HeartBeatManager.OnNext(Alarm) to properly handle exception
   thrown during getting or sending evaluator heartbeat.
 * adds test to verify that task message send failure in heartbeat causes
   FailedEvaluator event on driver.

JIRA:
  [REEF-1430](https://issues.apache.org/jira/browse/REEF-1430)

Pull request:
  This closes #1202