[Backport 2.x] [Streaming Indexing] Fix intermittent 'The bulk request must be terminated by a newline [\n]' failures

CHANGELOG.md

@@ -81,6 +81,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix warnings from SLF4J on startup when repository-s3 is installed ([#16194](https://github.com/opensearch-project/OpenSearch/pull/16194))
 - Fix protobuf-java leak through client library dependencies ([#16254](https://github.com/opensearch-project/OpenSearch/pull/16254))
 - Fix multi-search with template doesn't return status code ([#16265](https://github.com/opensearch-project/OpenSearch/pull/16265))
+- [Streaming Indexing] Fix intermittent 'The bulk request must be terminated by a newline [\n]' failures [#16337](https://github.com/opensearch-project/OpenSearch/pull/16337))
 - Fix wrong default value when setting `index.number_of_routing_shards` to null on index creation ([#16331](https://github.com/opensearch-project/OpenSearch/pull/16331))
 
 ### Security

buildSrc/version.properties

@@ -34,7 +34,7 @@ netty             = 4.1.114.Final
 joda              = 2.12.7
 
 # project reactor
-reactor_netty     = 1.1.22
+reactor_netty     = 1.1.23
 reactor           = 3.5.20
 
 # client dependencies

plugins/repository-azure/licenses/reactor-netty-core-1.1.23.jar.sha1

@@ -0,0 +1 @@
+a7059b0c18ab7aa0fa9e08b48cb6a20b15c11478

plugins/repository-azure/licenses/reactor-netty-http-1.1.23.jar.sha1

@@ -0,0 +1 @@
+94b294fa90aee2e88ad4337251e278aaac21362c

plugins/transport-reactor-netty4/licenses/reactor-netty-core-1.1.23.jar.sha1

@@ -0,0 +1 @@
+a7059b0c18ab7aa0fa9e08b48cb6a20b15c11478

plugins/transport-reactor-netty4/licenses/reactor-netty-http-1.1.23.jar.sha1

@@ -0,0 +1 @@
+94b294fa90aee2e88ad4337251e278aaac21362c

plugins/transport-reactor-netty4/src/javaRestTest/java/org/opensearch/rest/ReactorNetty4StreamingIT.java

@@ -304,11 +304,36 @@ public void testStreamingLargeDocument() throws IOException {
             String.format(
                 Locale.getDefault(),
                 "{ \"index\": { \"_index\": \"test-streaming\", \"_id\": \"1\" } }\n{ \"name\": \"%s\"  }\n",
-                randomAlphaOfLength(5000)
+                randomAlphaOfLength(7000)
+            )
+        );
+
+        final StreamingRequest<ByteBuffer> streamingRequest = new StreamingRequest<>(
+            "POST",
+            "/_bulk/stream",
+            Flux.fromStream(stream).map(s -> ByteBuffer.wrap(s.getBytes(StandardCharsets.UTF_8)))
+        );
+
+        final StreamingResponse<ByteBuffer> streamingResponse = client().streamRequest(streamingRequest);
+
+        StepVerifier.create(Flux.from(streamingResponse.getBody()).map(b -> new String(b.array(), StandardCharsets.UTF_8)))
+            .expectNextMatches(s -> s.contains("\"result\":\"created\"") && s.contains("\"_id\":\"1\""))
+            .expectComplete()
+            .verify();
+
+        assertThat(streamingResponse.getStatusLine().getStatusCode(), equalTo(200));
+        assertThat(streamingResponse.getWarnings(), empty());
+    }
+
+    public void testStreamingLargeDocumentThatExceedsChunkSize() throws IOException {
+        final Stream<String> stream = Stream.of(
+            String.format(
+                Locale.getDefault(),
+                "{ \"index\": { \"_index\": \"test-streaming\", \"_id\": \"1\" } }\n{ \"name\": \"%s\"  }\n",
+                randomAlphaOfLength(9000) /* the default chunk size limit is set 8k */
             )
         );
 
-        final Duration delay = Duration.ofMillis(1);
         final StreamingRequest<ByteBuffer> streamingRequest = new StreamingRequest<>(
             "POST",
             "/_bulk/stream",

plugins/transport-reactor-netty4/src/main/java/org/opensearch/http/reactor/netty4/ReactorNetty4HttpServerTransport.java

@@ -230,6 +230,7 @@ protected HttpServerChannel bind(InetSocketAddress socketAddress) throws Excepti
                     spec -> spec.maxChunkSize(maxChunkSize.bytesAsInt())
                         .maxHeaderSize(maxHeaderSize.bytesAsInt())
                         .maxInitialLineLength(maxInitialLineLength.bytesAsInt())
+                        .allowPartialChunks(false)
                 )
                 .handle((req, res) -> incomingRequest(req, res))
         );