better failure message when failing to find a type mapping for a document loaded from the index

Author: kimchy

modules/elasticsearch/src/main/java/org/elasticsearch/indices/TypeMissingException.java

@@ -32,6 +32,10 @@ public TypeMissingException(Index index, String type) {
         super(index, "type[" + type + "] missing");
     }
 
+    public TypeMissingException(Index index, String type, String message) {
+        super(index, "type[" + type + "] missing: " + message);
+    }
+
 
     @Override public RestStatus status() {
         return RestStatus.NOT_FOUND;

modules/elasticsearch/src/main/java/org/elasticsearch/search/fetch/FetchPhase.java

@@ -25,7 +25,9 @@
 import org.apache.lucene.index.IndexReader;
 import org.elasticsearch.common.collect.ImmutableMap;
 import org.elasticsearch.common.inject.Inject;
+import org.elasticsearch.index.Index;
 import org.elasticsearch.index.mapper.*;
+import org.elasticsearch.indices.TypeMissingException;
 import org.elasticsearch.search.SearchHitField;
 import org.elasticsearch.search.SearchParseElement;
 import org.elasticsearch.search.SearchPhase;
@@ -79,6 +81,10 @@ public void execute(SearchContext context) {
 
             DocumentMapper documentMapper = context.mapperService().documentMapper(uid.type());
 
+            if (documentMapper == null) {
+                throw new TypeMissingException(new Index(context.shardTarget().index()), uid.type(), "failed to find type loaded for doc [" + uid.id() + "]");
+            }
+
             byte[] source = extractSource(doc, documentMapper);
 
             // get the version