chungen0126 commented on code in PR #6613:
URL: https://github.com/apache/ozone/pull/6613#discussion_r1792465132
##########
hadoop-hdds/client/src/main/java/org/apache/hadoop/hdds/scm/XceiverClientGrpc.java:
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@@ -618,6 +625,71 @@ private void decreasePendingMetricsAndReleaseSemaphore() {
return new XceiverClientReply(replyFuture);
}
+ public XceiverClientReply sendCommandAsyncReadOnly(
+ ContainerCommandRequestProto request, DatanodeDetails dn)
+ throws IOException, InterruptedException {
+
+ CompletableFuture<ContainerCommandResponseProto> future =
+ new CompletableFuture<>();
+ ContainerCommandResponseProto.Builder response =
+ ContainerCommandResponseProto.newBuilder();
+ ContainerProtos.ReadBlockResponseProto.Builder readBlock =
+ ContainerProtos.ReadBlockResponseProto.newBuilder();
+ checkOpen(dn);
+ UUID dnID = dn.getUuid();
+ Type cmdType = request.getCmdType();
+ semaphore.acquire();
+ long requestTime = System.currentTimeMillis();
+ metrics.incrPendingContainerOpsMetrics(cmdType);
+
+ final StreamObserver<ContainerCommandRequestProto> requestObserver =
+ asyncStubs.get(dnID).withDeadlineAfter(timeout, TimeUnit.SECONDS)
+ .send(new StreamObserver<ContainerCommandResponseProto>() {
+ @Override
+ public void onNext(
+ ContainerCommandResponseProto responseProto) {
+ ReadChunkResponseProto readChunk =
+ responseProto.getReadChunk();
+ if (responseProto.getResult() == Result.SUCCESS) {
+ readBlock.addReadChunk(readChunk);
+ } else {
+ future.complete(
+ ContainerCommandResponseProto.newBuilder(responseProto)
+ .setCmdType(Type.StreamRead).build());
+ }
+ }
+
+ @Override
+ public void onError(Throwable t) {
+ future.completeExceptionally(t);
+ metrics.decrPendingContainerOpsMetrics(cmdType);
+ metrics.addContainerOpsLatency(
+ cmdType, System.currentTimeMillis() - requestTime);
+
+ }
+
+ @Override
+ public void onCompleted() {
+ if (readBlock.getReadChunkCount() > 0) {
+ future.complete(response.setReadBlock(readBlock)
+
.setCmdType(Type.StreamRead).setResult(Result.SUCCESS).build());
+ }
+ if (!future.isDone()) {
+ future.completeExceptionally(new IOException(
+ "Stream completed but no reply for request " +
+ processForDebug(request)));
+ }
Review Comment:
No, we should check the readBlock first. The `future.isDone()` depends on if
there are responses and they will be collected by `readBlock`
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