[MAPREDUCE-2141] Add an "extra data" field to Task for use by Mesos

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.22.0
• Assignee: Matei Alexandru Zaharia
• Reporter: Matei Alexandru Zaharia
• Created: 19/Oct/10 00:49
• Updated: 07/Apr/11 15:40
• Resolved: 11/Nov/10 03:45

Description

In order to support running Hadoop on the Mesos cluster manager (http://mesos.berkeley.edu/), I'd like to add an extra String field to the Task class to allow extra data (a Mesos task ID) to be associated with each task. This should have no impact on normal operation other than making the serialized form of Task a few bytes longer. In the Mesos support patch for Hadoop, this field is set by a pluggable Hadoop scheduler implementation to allow code on the TaskTracker side to see which Mesos task corresponds to each Hadoop task.