In order for the code bellow to work:

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

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

Delete documents using the request handler /update:
final String UPDATE_REQUEST_PATH = "/update"; final String[] solrUrl = { "http://localhost:8983/solr" }; final String collectionName = "collection1"; final CloudSolrClient cloudSolrClient = new CloudSolrClient.Builder(Arrays.asList(solrUrl)).build(); cloudSolrClient.setDefaultCollection(collectionName); // deleting documents [/update] [UpdateRequest::deleteById] { final UpdateRequest updateRequest = new UpdateRequest(); updateRequest.deleteById("1"); updateRequest.setPath(UPDATE_REQUEST_PATH); updateRequest.setMethod(METHOD.POST); final NamedList<Object> response = cloudSolrClient.request(updateRequest); System.out.println(response); } cloudSolrClient.close();