bulk_indexer: Remove ES field mapper field preview (#190)

* bulk_indexer: Remove ES field mapper field preview

* fix: update code

* Update bulk_indexer.go

Author: kruskall

appender_test.go

@@ -747,7 +747,7 @@ func TestAppenderIndexFailedLogging(t *testing.T) {
 		for i, item := range result.Items {
 			itemResp := item["create"]
 			itemResp.Index = "an_index"
-			switch i % 3 {
+			switch i % 4 {
 			case 0:
 				itemResp.Error.Type = "error_type"
 				itemResp.Error.Reason = "error_reason_even. Preview of field's value: 'abc def ghi'"
@@ -757,6 +757,10 @@ func TestAppenderIndexFailedLogging(t *testing.T) {
 			case 2:
 				itemResp.Error.Type = "unavailable_shards_exception"
 				itemResp.Error.Reason = "this reason should not be logged"
+			case 3:
+				itemResp.Error.Type = "x_content_parse_exception"
+				itemResp.Error.Reason = "this reason should not be logged"
+
 			}
 			item["create"] = itemResp
 		}
@@ -772,7 +776,7 @@ func TestAppenderIndexFailedLogging(t *testing.T) {
 	require.NoError(t, err)
 	defer indexer.Close(context.Background())
 
-	const N = 3 * 2
+	const N = 4 * 2
 	for i := 0; i < N; i++ {
 		addMinimalDoc(t, indexer, "logs-foo-testing")
 	}
@@ -790,6 +794,8 @@ func TestAppenderIndexFailedLogging(t *testing.T) {
 	assert.Equal(t, int64(2), entries[1].Context[0].Integer)
 	assert.Equal(t, "failed to index documents in 'an_index' (unavailable_shards_exception): ", entries[2].Message)
 	assert.Equal(t, int64(2), entries[2].Context[0].Integer)
+	assert.Equal(t, "failed to index documents in 'an_index' (x_content_parse_exception): ", entries[3].Message)
+	assert.Equal(t, int64(2), entries[3].Context[0].Integer)
 }
 
 func TestAppenderRetryLimit(t *testing.T) {

bulk_indexer.go

@@ -139,11 +139,12 @@ func init() {
 									case "type":
 										item.Error.Type = i.ReadString()
 									case "reason":
+										reason := i.ReadString()
 										// Match Elasticsearch field mapper field value:
 										// failed to parse field [%s] of type [%s] in %s. Preview of field's value: '%s'
 										// https://github.com/elastic/elasticsearch/blob/588eabe185ad319c0268a13480465966cef058cd/server/src/main/java/org/elasticsearch/index/mapper/FieldMapper.java#L234
 										item.Error.Reason, _, _ = strings.Cut(
-											i.ReadString(), ". Preview",
+											reason, ". Preview",
 										)
 									default:
 										i.Skip()
@@ -155,8 +156,8 @@ func init() {
 							}
 							return true
 						})
-						// For unavailable_shards_exception, remove item.Error.Reason as it may contain sensitive request content.
-						if item.Error.Type == "unavailable_shards_exception" {
+						// For specific exceptions, remove item.Error.Reason as it may contain sensitive request content.
+						if item.Error.Type == "unavailable_shards_exception" || item.Error.Type == "x_content_parse_exception" {
 							item.Error.Reason = ""
 						}