public PercolateShardResponse percolate(PercolateShardRequest request) {
IndexService percolateIndexService = indicesService.indexServiceSafe(request.shardId().getIndex());
IndexShard indexShard = percolateIndexService.shardSafe(request.shardId().id());
indexShard.readAllowed(); // check if we can read the shard...
ShardPercolateService shardPercolateService = indexShard.shardPercolateService();
shardPercolateService.prePercolate();
long startTime = System.nanoTime();
SearchShardTarget searchShardTarget = new SearchShardTarget(clusterService.localNode().id(), request.shardId().getIndex(), request.shardId().id());
final PercolateContext context = new PercolateContext(