presto-main/src/main/java/io/prestosql/server/remotetask/TaskInfoFetcher.java/TaskInfoFetcher/success
class TaskInfoFetcher:    @Override
    public void success(TaskInfo newValue)
    {
        try (SetThreadName ignored = new SetThreadName("TaskInfoFetcher-%s", taskId)) {
            lastUpdateNanos.set(System.nanoTime());

            long startNanos;
            synchronized (this) {
                startNanos = this.currentRequestStartNanos.get();
            }
            updateStats(startNanos);
            errorTracker.requestSucceeded();
            updateTaskInfo(newValue);
        }
    }