Shashanka Balakuntala Srinivasa

Add fetcher-default as a plugin

4

Currently the fetcher default is in package edu.usc.irds.sparkler.util, this issue is to move this as a plugin.

[TEZ-138] Merge DAG/DAGImpl, Vertex/VertexImpl, Task/TaskImpl, TaskAttempt/TaskAttemptImpl

1

The changes aim to merge the classes mentioned. Link to JIRA [TEZ-138](https://issues.apache.org/jira/browse/TEZ-138)

MAHOUT-2096 [WIP] next() Called On Possible Empty iterator()

2

### Purpose of PR: Initially there was no check for the empty iterator when calling the next() function, which could result in an exception. ### Important ToDos Please mark each...

[Mahout-1958] Change the variable type to long to avoid overflow

2

### Purpose of PR: Please give a short description of what this PR is for. ### Important ToDos Please mark each with an "x" - [x] A JIRA ticket exists...