# "Failed to derive xcontent" on REST bulk with ES 5.0 **URL:** \ **Category:** Elasticsearch\ **Created:** [June 12, 2017, 9:59am UTC](https://discuss.elastic.co/t/failed-to-derive-xcontent-on-rest-bulk-with-es-5-0/89007 "2017-06-12T09:59:24Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![echauchot](https://avatars.discourse-cdn.com/v4/letter/e/d9b06d/32.png) [@echauchot](https://discuss.elastic.co/u/echauchot)\ **Post date:** [June 12, 2017, 9:59am UTC](https://discuss.elastic.co/t/failed-to-derive-xcontent-on-rest-bulk-with-es-5-0/89007/1 "2017-06-12T09:59:25Z")
Hi all, I'm migrating code from 2.4 to 5.0 and I'm facing an issue. The code bellow (that uses RestClient v 5.0.0) fails to execute the whole bulk and raises a ``` java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:294) at java.lang.Thread.run(Thread.java:745) Caused by: org.elasticsearch.client.ResponseException: POST http://127.0.0.1:9200/beam/test/_bulk?refresh=true: HTTP/1.1 400 Bad Request {"error":{"root_cause":[{"type":"parse_exception","reason":"Failed to derive xcontent"}],"type":"parse_exception","reason":"Failed to derive xcontent"},"status":400} at org.elasticsearch.client.RestClient$1.completed(RestClient.java:310) at org.elasticsearch.client.RestClient$1.completed(RestClient.java:299) at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:119) at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.responseCompleted(DefaultClientExchangeHandlerImpl.java:177) at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.processResponse(HttpAsyncRequestExecutor.java:436) at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:326) at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265) at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:81) at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:39) at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114) at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162) at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337) at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315) at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276) at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104) at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:588) ``` But this code works well with ES v2.4. The request json payload seems to be correct because it is executed properly by sense. ``` POST /beam/test/_bulk?refresh=true { "index" : {} } {"scientist":"Einstein", "id":0} { "index" : {} } {"scientist":"Darwin", "id":1} ``` I did not see any breaking change in the website about this. What am I doing wrong? ``` /** Inserts the given number of test documents into Elasticsearch. */ static void insertTestDocuments(String index, String type, long numDocs, RestClient restClient) throws IOException { List data = ElasticSearchIOTestUtils.createDocuments( numDocs, ElasticSearchIOTestUtils.InjectionMode.DO_NOT_INJECT_INVALID_DOCS); StringBuilder bulkRequest = new StringBuilder(); for (String document : data) { bulkRequest.append(String.format("{ \"index\" : {} }%n%s%n", document)); } String endPoint = String.format("/%s/%s/_bulk", index, type); HttpEntity requestBody = new NStringEntity(bulkRequest.toString(), ContentType.APPLICATION_JSON); Response response = restClient.performRequest("POST", endPoint, Collections.singletonMap("refresh", "true"), requestBody, new BasicHeader("", "")); JsonNode searchResult = ElasticsearchIO.parseResponse(response); boolean errors = searchResult.path("errors").asBoolean(); if (errors){ throw new IOException( String.format("Failed to insert test documents in index %s", index)); } } /** * Generates a list of test documents for insertion. * * @param numDocs Number of docs to generate * @param injectionMode {@link InjectionMode} that specifies whether to insert malformed documents * @return the list of json String representing the documents */ static List createDocuments(long numDocs, InjectionMode injectionMode) { String[] scientists = { "Einstein", "Darwin", "Copernicus", "Pasteur", "Curie", "Faraday", "Newton", "Bohr", "Galilei", "Maxwell" }; ArrayList data = new ArrayList<>(); for (int i = 0; i < numDocs; i++) { int index = i % scientists.length; // insert 2 malformed documents if (InjectionMode.INJECT_SOME_INVALID_DOCS.equals(injectionMode) && (i == 6 || i == 7)) { data.add(String.format("{\"scientist\";\"%s\", \"id\":%d}", scientists[index], i)); } else { data.add(String.format("{\"scientist\":\"%s\", \"id\":%d}", scientists[index], i)); } } return data; } ``` ---
**Author:** ![jimczi](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jimczi/32/47985_2.png) [@jimczi](https://discuss.elastic.co/u/jimczi)\ **Post date:** [June 12, 2017, 10:44am UTC](https://discuss.elastic.co/t/failed-to-derive-xcontent-on-rest-bulk-with-es-5-0/89007/2 "2017-06-12T10:44:41Z")
The call to restClient#performRequest should not contain `new BasicHeader("", "")`. If headers are empty you don't have to provide a fake one and you can directly call: ```auto HttpEntity requestBody = new NStringEntity(bulkRequest.toString(), ContentType.APPLICATION_JSON); Response response = restClient.performRequest("POST", endPoint, Collections.singletonMap("refresh", "true"), requestBody); ``` In 5.4 when you set an empty header it fails with the following message: `empty headers are not allowed []` .. and it works when the header is removed. ---
**Author:** ![echauchot](https://avatars.discourse-cdn.com/v4/letter/e/d9b06d/32.png) [@echauchot](https://discuss.elastic.co/u/echauchot)\ **Post date:** [June 12, 2017, 12:46pm UTC](https://discuss.elastic.co/t/failed-to-derive-xcontent-on-rest-bulk-with-es-5-0/89007/3 "2017-06-12T12:46:39Z")
Thanks Jim! Indeed it works on both ES versions when removing the empty headers. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 10, 2017, 12:46pm UTC](https://discuss.elastic.co/t/failed-to-derive-xcontent-on-rest-bulk-with-es-5-0/89007/4 "2017-07-10T12:46:43Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.