[REEF-1520] Enable concurrent processing of .NET driver-side events

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.16
• Component/s: REEF Driver, REEF.NET Driver
• Assignee: Unassigned
• Reporter: Joo Seong Jeong
• Created: 11/Aug/16 06:24
• Updated: 11/Aug/16 06:26

Description

A .NET driver is backed by a Java driver, with driver-side events being delegated from Java to .NET via JNI. However, for the ease of development, we currently have setup all events to be processed one at a time, sequentially.

// org.apache.reef.javabridge.generic.JobDriver
public void onNext(final AllocatedEvaluator allocatedEvaluator) {
  synchronized (JobDriver.this) {
    ..
  }
}

public void onNext(final ActiveContext context) {
  synchronized (JobDriver.this) {
    ..
  }
}

Concurrent processing is NOT inherently impossible, since we already have it on the Java side. We can make improvements to the code so that concurrency is allowed for the .NET side too.

Issue Links

• relates to: REEF-334 Make sure REEF.NET builds and runs on Linux