How to avoid OutOfMemoryError when uploading a large file using Jersey client

Question

I am using Jersey client for http-based request. It works well if the file is small but run into error when I post a file with size of 700M:

Exception in thr         


        

Answer 1

In my case (Jersey 2.23.2) rschmidt13's solution gave this warning:

WARNING: Attempt to send restricted header(s) while the [sun.net.http.allowRestrictedHeaders] system property not set. Header(s) will possibly be ignored.

This can be solved adding the following line:

System.setProperty("sun.net.http.allowRestrictedHeaders", "true");

However I think a cleaner solution can be obtained using the StreamingOutput interface. I post a complete example hoping it could be useful.

Client (File upload)

WebTarget target = ClientBuilder.newBuilder().build()
            .property(ClientProperties.CHUNKED_ENCODING_SIZE, 1024)
            .property(ClientProperties.REQUEST_ENTITY_PROCESSING, "CHUNKED")
            .target("");

StreamingOutput out = new StreamingOutput() {

    @Override
    public void write(OutputStream output) throws IOException, 
            WebApplicationException {

        try (FileInputStream is = new FileInputStream(file)) {

            int available;
            while ((available = is.available()) > 0) {
                // or use a buffer
                output.write(is.read());
            }
        }
    }
};

Response response = target.request().post(Entity.text(out));

Server

@Path("resourcename")
public class MyResource {

    @Context
    HttpServletRequest request;

    @POST
    @Path("thepath")
    public Response upload() throws IOException, ServletException {

        try (InputStream is = request.getInputStream()) {
            // ...
        }
    }
}