- close
Close the connection.
- flush
Flush the data through any buffers.
- mapItem
For maps with pipedInput, the key/value pairs are sent via this messaage.
- abort
The task should stop as soon as possible, because something has gone wrong.
- endOfInput
The task has no more input coming, but it should finish processing it's input.
- reduceKey
The reduce should be given a new key
- reduceValue
The reduce should be given a new value
- runMap
Run a map task in the child.
- runReduce
Run a reduce task in the child
- setInputTypes
Set the input types for Maps.
- setJobConf
Set the JobConf for the task.
- start
Start communication