public MutableShardRouting findPrimaryForBackup(MutableShardRouting shard) {
assert !shard.primary();
for (RoutingNode routingNode : nodesToShards.values()) {
for (MutableShardRouting shardRouting : routingNode) {
if (shardRouting.shardId().equals(shard.shardId()) && shardRouting.primary()) {
return shardRouting;
}
}
}
return null;
}
