final ArrayList<MutableShardRouting> shards = new ArrayList<>(index.getAllShards());
for (MutableShardRouting shard : shards) {
if (shard.started()) {
// skip initializing, unassigned and relocating shards we can't relocate them anyway
Decision allocationDecision = deciders.canAllocate(shard, node, allocation);
Decision rebalanceDecision = deciders.canRebalance(shard, allocation);
if (((allocationDecision.type() == Type.YES) || (allocationDecision.type() == Type.THROTTLE))
&& ((rebalanceDecision.type() == Type.YES) || (rebalanceDecision.type() == Type.THROTTLE))) {
Decision srcDecision;
if ((srcDecision = maxNode.removeShard(shard)) != null) {
minNode.addShard(shard, srcDecision);