sunchao commented on a change in pull request #2522:
URL: https://github.com/apache/hadoop/pull/2522#discussion_r537346576
##########
File path:
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java
##########
@@ -41,10 +41,7 @@
import java.util.Optional;
import java.util.Set;
import java.util.Objects;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.LinkedBlockingQueue;
-import java.util.concurrent.ThreadPoolExecutor;
-import java.util.concurrent.TimeUnit;
+import java.util.concurrent.*;
Review comment:
oops will do - I forgot to set this up on my new laptop
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