[REEF-1951] Make Driver Status more robust.

This change makes the communication of the Driver status between the
Driver and the .NET Client more robust. It gueards against the Client
calling the HTTP server to late by changes on the Java side. It guards
against calling the HTTP server to early by changes on the .NET side.

On the *Java side*, this introduces a new alarm on the clock that makes
sure that `DriverStatusHTTPHandler` is called at least once via HTTP in
2s after launching.

On the *.NET Side*, this introduces a retry loop around the first
attempt to connect to the Driver. This makes sure we don't call it too
early.

JIRA:
  [REEF-1951](https://issues.apache.org/jira/browse/REEF-1951)

Pull Request:
  This closes #1413
14 files changed
tree: 6c8881fdc8ee917f7adc4e776b8581167ff5cb1d
  1. bin/
  2. dev/
  3. lang/
  4. website/
  5. .gitattributes
  6. .gitignore
  7. .travis.yml
  8. appveyor.yml
  9. Doxyfile
  10. HEADER
  11. LICENSE
  12. NOTICE
  13. pom.xml
  14. README.md
README.md

Apache REEF™

Apache REEF™ (Retainable Evaluator Execution Framework) is a library for developing portable applications for cluster resource managers such as Apache Hadoop YARN or Apache Mesos. For example, Microsoft Azure Stream Analytics is built on REEF and Hadoop.

Online Documentation

Detailed information on REEF can be found in the following places:

The developer mailing list is the best way to reach REEF‘s developers when the above aren’t sufficient.

Build Status

ComponentOSStatus
REEF JavaUbuntuBuild Status
REEF.NETWindowsBuild status

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Java.NET
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License

Apache 2.0