shardedJobId, readers.size(), writers.size());
ImmutableList.Builder<WorkerShardTask<KeyValue<ByteBuffer, Iterator<ByteBuffer>>,
KeyValue<ByteBuffer, List<ByteBuffer>>, MergeContext>> mergeTasks =
ImmutableList.builder();
for (int i = 0; i < readers.size(); i++) {
mergeTasks.add(new MergeShardTask(mrJobId,
i,
readers.size(),
readers.get(i),
writers.get(i),
settings.getSortReadTimeMillis()));