private RpcResult sendRpcWithStream(String... streams) throws Exception { TransportClient client = clientFactory.createClient(TestUtils.getLocalHost(), server.getPort()); final Semaphore sem = new Semaphore(0); RpcResult res = new RpcResult(); res.successMessages = Collections.synchronizedSet(new HashSet<String>()); res.errorMessages = Collections.synchronizedSet(new HashSet<String>()); for (String stream : streams) { int idx = stream.lastIndexOf('/'); ManagedBuffer meta = new NioManagedBuffer(JavaUtils.stringToBytes(stream)); String streamName = (idx == -1) ? stream : stream.substring(idx + 1); ManagedBuffer data = testData.openStream(conf, streamName); client.uploadStream(meta, data, new RpcStreamCallback(stream, res, sem)); } if (!sem.tryAcquire(streams.length, 5, TimeUnit.SECONDS)) { fail("Timeout getting response from the server"); } streamCallbacks.values().forEach(streamCallback -> { try { streamCallback.verify(); } catch (IOException e) { throw new RuntimeException(e); } }); client.close(); return res; }