// initialize mapping/ scroll reader
InitializationUtils.setValueReaderIfNotSet(settings, WritableValueReader.class, log);
PartitionDefinition part = new PartitionDefinition(esSplit.nodeIp, esSplit.httpPort, esSplit.nodeName, esSplit.nodeId, esSplit.shardId, settings.save(), esSplit.mapping);
PartitionReader partitionReader = RestService.createReader(settings, part, log);
this.scrollReader = partitionReader.scrollReader;
this.client = partitionReader.client;
this.queryBuilder = partitionReader.queryBuilder;