让 AWS S3 客户端在多线程代码中工作

Question

I am trying to upload to S3 within my asynchronous Java code

private void submitCallablesWithExecutor() throws InterruptedException, ExecutionException, TimeoutException {

        ExecutorService executorService = null;

        try {
            executorService = Executors.newCachedThreadPool();

            Future<String> task1Future = executorService.submit(new Callable<String>() {

                public String call() {
                    try {
                        processExportRequest(xmlPutRequest_, customizedRequest_, response_);
                        return "Success";
                    } catch (Exception ex) {
                        return ex.getMessage();
                    }
                }
            });

        } finally {
            executorService.shutdown();

            try {
                if (!executorService.awaitTermination(800, TimeUnit.MILLISECONDS)) {
                    executorService.shutdownNow();
                }
            } catch (InterruptedException e) {
                executorService.shutdownNow();
            }
        }
    }

within processExportRequest I am calling upload to S3. I have tried both S3Client and S3AsyncClient. In both cases, I am getting following error:

Failed to upload to S3: java.lang.IllegalStateException: Interrupted waiting to refresh the value.

I don't see anywhere in my code that's calling Thread.interrupt(), and everything else seems to work fine, just not S3 upload. Maybe the multithreaded nature of Java Future is not compatible with AWS SDK? Thanks.

Answer 1

I changed Future to CompletableFuture, and combine two of them (in sequence):

private CompletableFuture<PutObjectResponse> processExportAndUploadAsync()
            throws IOException {
        CompletableFuture<PutObjectResponse> result = processExportAsync()
                .thenCompose(fileName -> uploadS3Async(fileName));

        return result;
    }

It seems to work.