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[#1177] improvement: Reduce the write time of tasks #1179

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Aug 31, 2023
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Original file line number Diff line number Diff line change
Expand Up @@ -24,10 +24,12 @@
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;

Expand Down Expand Up @@ -93,6 +95,8 @@ public class RssShuffleWriter<K, V, C> extends ShuffleWriter<K, V> {

protected final ShuffleWriteMetrics shuffleWriteMetrics;

private final BlockingQueue<Object> finishEventQueue = new LinkedBlockingQueue<>();

// Only for tests
@VisibleForTesting
public RssShuffleWriter(
Expand Down Expand Up @@ -293,24 +297,47 @@ protected List<CompletableFuture<Long>> postBlockEvent(
List<ShuffleBlockInfo> shuffleBlockInfoList) {
List<CompletableFuture<Long>> futures = new ArrayList<>();
for (AddBlockEvent event : bufferManager.buildBlockEvents(shuffleBlockInfoList)) {
event.addCallback(
() -> {
boolean ret = finishEventQueue.add(new Object());
if (!ret) {
LOG.error("Add event " + event + " to finishEventQueue fail");
}
});
futures.add(shuffleManager.sendData(event));
}
return futures;
}

@VisibleForTesting
protected void checkBlockSendResult(Set<Long> blockIds) {
long start = System.currentTimeMillis();
while (true) {
checkIfBlocksFailed();
Set<Long> successBlockIds = shuffleManager.getSuccessBlockIds(taskId);
blockIds.removeAll(successBlockIds);
if (blockIds.isEmpty()) {
break;
boolean interrupted = false;
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It looks complex for current implement.

And I think the sendTimeout is wrong, which is valid for all everytime queue.poll

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We use remainingMs instead of sendCheckTImeout.

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My fault. +1


try {
long remainingMs = sendCheckTimeout;
long end = System.currentTimeMillis() + remainingMs;

while (true) {
try {
finishEventQueue.clear();
checkIfBlocksFailed();
Set<Long> successBlockIds = shuffleManager.getSuccessBlockIds(taskId);
blockIds.removeAll(successBlockIds);
if (blockIds.isEmpty()) {
break;
}
if (finishEventQueue.isEmpty()) {
remainingMs = Math.max(end - System.currentTimeMillis(), 0);
Object event = finishEventQueue.poll(remainingMs, TimeUnit.MILLISECONDS);
if (event == null) {
break;
}
}
} catch (InterruptedException e) {
interrupted = true;
}
}
LOG.info("Wait " + blockIds.size() + " blocks sent to shuffle server");
Uninterruptibles.sleepUninterruptibly(sendCheckInterval, TimeUnit.MILLISECONDS);
if (System.currentTimeMillis() - start > sendCheckTimeout) {
if (!blockIds.isEmpty()) {
String errorMsg =
"Timeout: Task["
+ taskId
Expand All @@ -322,6 +349,10 @@ protected void checkBlockSendResult(Set<Long> blockIds) {
LOG.error(errorMsg);
throw new RssException(errorMsg);
}
} finally {
if (interrupted) {
Thread.currentThread().interrupt();
}
}
}

Expand Down