Improve DateFieldMapper ignore_malformed handling (#50090)

A recent change around date parsing (#46675) made it stricter, so we should now also
catch DateTimeExceptions in DateFieldMapper and ignore those when the
`ignore_malformed` option is set.

Closes #50081

Author: Christoph Büscher

server/src/main/java/org/elasticsearch/index/mapper/DateFieldMapper.java

@@ -54,6 +54,7 @@
 import org.elasticsearch.search.DocValueFormat;
 
 import java.io.IOException;
+import java.time.DateTimeException;
 import java.time.Instant;
 import java.time.ZoneId;
 import java.time.ZoneOffset;
@@ -77,19 +78,23 @@ public static class Defaults {
 
     public enum Resolution {
         MILLISECONDS(CONTENT_TYPE, NumericType.DATE) {
+            @Override
             public long convert(Instant instant) {
                 return instant.toEpochMilli();
             }
 
+            @Override
             public Instant toInstant(long value) {
                 return Instant.ofEpochMilli(value);
             }
         },
         NANOSECONDS("date_nanos", NumericType.DATE_NANOSECONDS) {
+            @Override
             public long convert(Instant instant) {
                 return toLong(instant);
             }
 
+            @Override
             public Instant toInstant(long value) {
                 return DateUtils.toInstant(value);
             }
@@ -274,7 +279,9 @@ public MappedFieldType clone() {
 
         @Override
         public boolean equals(Object o) {
-            if (!super.equals(o)) return false;
+            if (!super.equals(o)) {
+                return false;
+            }
             DateFieldType that = (DateFieldType) o;
             return Objects.equals(dateTimeFormatter, that.dateTimeFormatter) && Objects.equals(resolution, that.resolution);
         }
@@ -536,7 +543,7 @@ protected void parseCreateField(ParseContext context, List<IndexableField> field
         long timestamp;
         try {
             timestamp = fieldType().parse(dateAsString);
-        } catch (IllegalArgumentException | ElasticsearchParseException e) {
+        } catch (IllegalArgumentException | ElasticsearchParseException | DateTimeException e) {
             if (ignoreMalformed.value()) {
                 context.addIgnoredField(fieldType.name());
                 return;

server/src/test/java/org/elasticsearch/index/mapper/DateFieldMapperTests.java

@@ -159,7 +159,14 @@ public void testStore() throws Exception {
         assertEquals(1457654400000L, storedField.numericValue().longValue());
     }
 
-    public void testIgnoreMalformed() throws Exception {
+    public void testIgnoreMalformed() throws IOException {
+        testIgnoreMalfomedForValue("2016-03-99",
+                "failed to parse date field [2016-03-99] with format [strict_date_optional_time||epoch_millis]");
+        testIgnoreMalfomedForValue("-2147483648",
+                "Invalid value for Year (valid values -999999999 - 999999999): -2147483648");
+    }
+
+    private void testIgnoreMalfomedForValue(String value, String expectedException) throws IOException {
         String mapping = Strings.toString(XContentFactory.jsonBuilder().startObject().startObject("type")
                 .startObject("properties").startObject("field").field("type", "date").endObject().endObject()
                 .endObject().endObject());
@@ -171,12 +178,11 @@ public void testIgnoreMalformed() throws Exception {
         ThrowingRunnable runnable = () -> mapper.parse(new SourceToParse("test", "type", "1", BytesReference
                 .bytes(XContentFactory.jsonBuilder()
                         .startObject()
-                        .field("field", "2016-03-99")
+                        .field("field", value)
                         .endObject()),
                 XContentType.JSON));
         MapperParsingException e = expectThrows(MapperParsingException.class, runnable);
-        assertThat(e.getCause().getMessage(),
-            containsString("failed to parse date field [2016-03-99] with format [strict_date_optional_time||epoch_millis]"));
+        assertThat(e.getCause().getMessage(), containsString(expectedException));
 
         mapping = Strings.toString(XContentFactory.jsonBuilder().startObject().startObject("type")
                 .startObject("properties").startObject("field").field("type", "date")
@@ -188,7 +194,7 @@ public void testIgnoreMalformed() throws Exception {
         ParsedDocument doc = mapper2.parse(new SourceToParse("test", "type", "1", BytesReference
                 .bytes(XContentFactory.jsonBuilder()
                         .startObject()
-                        .field("field", ":1")
+                        .field("field", value)
                         .endObject()),
                 XContentType.JSON));