Throw parsing error if match phrase query contains multiple fields in its short version

core/src/main/java/org/elasticsearch/index/query/MatchPhraseQueryBuilder.java

@@ -207,6 +207,10 @@ public class MatchPhraseQueryBuilder extends AbstractQueryBuilder<MatchPhraseQue
                     }
                 }
             } else {
+                if (fieldName != null) {
+                    throw new ParsingException(parser.getTokenLocation(), "[match_phrase] query doesn't support multiple fields, found ["
+                            + fieldName + "] and [" + parser.currentName() + "]");
+                }
                 fieldName = parser.currentName();
                 value = parser.objectText();
             }

core/src/test/java/org/elasticsearch/index/query/MatchPhraseQueryBuilderTests.java

@@ -138,5 +138,14 @@ public class MatchPhraseQueryBuilderTests extends AbstractQueryTestCase<MatchPhr
                 "}";
         ParsingException e = expectThrows(ParsingException.class, () -> parseQuery(json));
         assertEquals("[match_phrase] query doesn't support multiple fields, found [message1] and [message2]", e.getMessage());
+
+        String shortJson = "{\n" +
+                "  \"match_phrase\" : {\n" +
+                "    \"message1\" : \"this is a test\",\n" +
+                "    \"message2\" : \"this is a test\"\n" +
+                "  }\n" +
+                "}";
+        e = expectThrows(ParsingException.class, () -> parseQuery(shortJson));
+        assertEquals("[match_phrase] query doesn't support multiple fields, found [message1] and [message2]", e.getMessage());
     }
 }