Allow FieldStatsRequest to disable cache

core/src/main/java/org/elasticsearch/action/admin/cluster/snapshots/status/SnapshotIndexShardStatus.java

@@ -141,7 +141,7 @@ public class SnapshotIndexShardStatus extends BroadcastShardResponse implements
 
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.startObject(Integer.toString(getShardId()));
+        builder.startObject(Integer.toString(getShardId().getId()));
         builder.field(Fields.STAGE, getStage());
         stats.toXContent(builder, params);
         if (getNodeId() != null) {

core/src/main/java/org/elasticsearch/action/admin/cluster/snapshots/status/SnapshotIndexStatus.java

@@ -49,7 +49,7 @@ public class SnapshotIndexStatus implements Iterable<SnapshotIndexShardStatus>,
         Map<Integer, SnapshotIndexShardStatus> indexShards = new HashMap<>();
         stats = new SnapshotStats();
         for (SnapshotIndexShardStatus shard : shards) {
-            indexShards.put(shard.getShardId(), shard);
+            indexShards.put(shard.getShardId().getId(), shard);
             stats.add(shard.getStats());
         }
         shardsStats = new SnapshotShardsStats(shards);

core/src/main/java/org/elasticsearch/action/fieldstats/FieldStatsRequest.java

@@ -44,6 +44,7 @@ public class FieldStatsRequest extends BroadcastRequest<FieldStatsRequest> {
     private String[] fields = Strings.EMPTY_ARRAY;
     private String level = DEFAULT_LEVEL;
     private IndexConstraint[] indexConstraints = new IndexConstraint[0];
+    private boolean useCache = true;
 
     public String[] getFields() {
         return fields;
@@ -56,6 +57,14 @@ public class FieldStatsRequest extends BroadcastRequest<FieldStatsRequest> {
         this.fields = fields;
     }
 
+    public void setUseCache(boolean useCache) {
+        this.useCache = useCache;
+    }
+
+    public boolean shouldUseCache() {
+        return useCache;
+    }
+
     public IndexConstraint[] getIndexConstraints() {
         return indexConstraints;
     }
@@ -184,6 +193,7 @@ public class FieldStatsRequest extends BroadcastRequest<FieldStatsRequest> {
             indexConstraints[i] = new IndexConstraint(in);
         }
         level = in.readString();
+        useCache = in.readBoolean();
     }
 
     @Override
@@ -201,6 +211,7 @@ public class FieldStatsRequest extends BroadcastRequest<FieldStatsRequest> {
             }
         }
         out.writeString(level);
+        out.writeBoolean(useCache);
     }
 
 }

core/src/main/java/org/elasticsearch/action/fieldstats/FieldStatsRequestBuilder.java

@@ -45,4 +45,9 @@ public class FieldStatsRequestBuilder extends
         request().level(level);
         return this;
     }
+
+    public FieldStatsRequestBuilder setUseCache(boolean useCache) {
+        request().setUseCache(useCache);
+        return this;
+    }
 }

core/src/main/java/org/elasticsearch/action/fieldstats/FieldStatsShardRequest.java

@@ -34,6 +34,7 @@ import java.util.Set;
 public class FieldStatsShardRequest extends BroadcastShardRequest {
 
     private String[] fields;
+    private boolean useCache;
 
     public FieldStatsShardRequest() {
     }
@@ -46,22 +47,29 @@ public class FieldStatsShardRequest extends BroadcastShardRequest {
             fields.add(indexConstraint.getField());
         }
         this.fields = fields.toArray(new String[fields.size()]);
+        useCache = request.shouldUseCache();
     }
 
     public String[] getFields() {
         return fields;
     }
 
+    public boolean shouldUseCache() {
+        return useCache;
+    }
+
     @Override
     public void readFrom(StreamInput in) throws IOException {
         super.readFrom(in);
         fields = in.readStringArray();
+        useCache = in.readBoolean();
     }
 
     @Override
     public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
         out.writeStringArrayNullable(fields);
+        out.writeBoolean(useCache);
     }
 
 }

core/src/main/java/org/elasticsearch/action/fieldstats/FieldStatsShardResponse.java

@@ -46,7 +46,6 @@ public class FieldStatsShardResponse extends BroadcastShardResponse {
         return fieldStats;
     }
 
-
     @Override
     public void readFrom(StreamInput in) throws IOException {
         super.readFrom(in);

core/src/main/java/org/elasticsearch/action/fieldstats/TransportFieldStatsAction.java

@@ -187,16 +187,15 @@ public class TransportFieldStatsAction extends
         ShardId shardId = request.shardId();
         Map<String, FieldStats<?>> fieldStats = new HashMap<>();
         IndexService indexServices = indicesService.indexServiceSafe(shardId.getIndex());
-        MapperService mapperService = indexServices.mapperService();
         IndexShard shard = indexServices.getShard(shardId.id());
         try (Engine.Searcher searcher = shard.acquireSearcher("fieldstats")) {
             // Resolve patterns and deduplicate
             Set<String> fieldNames = new HashSet<>();
             for (String field : request.getFields()) {
-                fieldNames.addAll(mapperService.simpleMatchToIndexNames(field));
+                fieldNames.addAll(shard.mapperService().simpleMatchToIndexNames(field));
             }
             for (String field : fieldNames) {
-                FieldStats<?> stats = indicesService.getFieldStats(shard, searcher, field);
+                FieldStats<?> stats = indicesService.getFieldStats(shard, searcher, field, request.shouldUseCache());
                 if (stats != null) {
                     fieldStats.put(field, stats);
                 }

core/src/main/java/org/elasticsearch/action/support/broadcast/BroadcastShardResponse.java

@@ -45,8 +45,8 @@ public abstract class BroadcastShardResponse extends TransportResponse {
         return this.shardId.getIndexName();
     }
 
-    public int getShardId() {
-        return this.shardId.id();
+    public ShardId getShardId() {
+        return this.shardId;
     }
 
     @Override

core/src/main/java/org/elasticsearch/indices/IndicesService.java

@@ -1121,12 +1121,16 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService>
      * @param shard the shard to use with the cache key
      * @param searcher searcher to use to lookup the field stats
      * @param field the actual field
+     * @param useCache should this request use the cache?
      */
-    public FieldStats<?> getFieldStats(IndexShard shard, Engine.Searcher searcher, String field) throws Exception {
+    public FieldStats<?> getFieldStats(IndexShard shard, Engine.Searcher searcher, String field, boolean useCache) throws Exception {
         MappedFieldType fieldType = shard.mapperService().fullName(field);
         if (fieldType == null) {
             return null;
         }
+        if (useCache == false) {
+            return fieldType.stats(searcher.reader());
+        }
         BytesReference cacheKey = new BytesArray("fieldstats:" + field);
         BytesReference statsRef = cacheShardLevelResult(shard, searcher.getDirectoryReader(), cacheKey, out -> {
             out.writeOptionalWriteable(fieldType.stats(searcher.reader()));

core/src/test/java/org/elasticsearch/fieldstats/FieldStatsIntegrationIT.java

@@ -487,6 +487,11 @@ public class FieldStatsIntegrationIT extends ESIntegTestCase {
         assertEquals(200, fieldStats.getAllFieldStats().get("value").getDocCount());
         // Because we refreshed the index we don't have any more hits in the cache. This is read from the index.
         assertEquals(oldHitCount, indexStats.getHitCount());
+
+        // We can also turn off the cache entirely
+        fieldStats = client().prepareFieldStats().setFields("value").get();
+        assertEquals(200, fieldStats.getAllFieldStats().get("value").getDocCount());
+        assertEquals(oldHitCount, indexStats.getHitCount());
     }
 
     private void indexRange(String index, long from, long to) throws Exception {