In order for the code bellow to work:

► Make sure to update the variables ("solrUrl", "collectionName", ...) with your information.

► Make sure to add the fields "id" and "field1" to your SchemaXml.

To force the commit, make sure to set the property "openSearcher" to true (SolrConfigXml file -> updateHandler -> autoCommit)

Note: You can also force the commit by running the URL: http://localhost:8983/solr/COLLECTION-NAME/update?commit=true

Add documents using the request handler /update (binary):
final String UPDATE_REQUEST_PATH = "/update"; final String[] solrUrl = { "http://localhost:8983/solr" }; final String collectionName = "collection1"; // org.apache.solr.common.params.CollectionAdminParams.COLLECTION = "collection"; final CloudSolrClient cloudSolrClient = new CloudSolrClient.Builder(Arrays.asList(solrUrl)).build(); cloudSolrClient.setDefaultCollection(collectionName); // adding documents [/update] [ContentStreamUpdateRequest::addContentStream] { final String contentStream = "<add><doc><field name=\"id\">4</field><field name=\"dynamicField1_s\">dynamic_field1 1</field><field name=\"field1\">field1 1</field></doc></add>"; final String contentType = "application/xml;charset=UTF-8"; final ByteArrayStream byteArrayStream = new ByteArrayStream(contentStream.getBytes(StandardCharsets.UTF_8), null); byteArrayStream.setContentType(contentType); final ModifiableSolrParams modifiableSolrParams = new ModifiableSolrParams(); modifiableSolrParams.add(CollectionAdminParams.COLLECTION, collectionName); final ContentStreamUpdateRequest contentStreamUpdateRequest = new ContentStreamUpdateRequest(UPDATE_REQUEST_PATH); contentStreamUpdateRequest.addContentStream(byteArrayStream); contentStreamUpdateRequest.setParams(modifiableSolrParams); contentStreamUpdateRequest.setMethod(METHOD.POST); final NamedList<Object> response = cloudSolrClient.request(contentStreamUpdateRequest); System.out.println(response); } cloudSolrClient.close();