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From tillrohrmann <...@git.apache.org>
Subject [GitHub] flink pull request #4993: [FLINK-7974][FLINK-7975][QS] Wait for shutdown in ...
Date Fri, 10 Nov 2017 13:14:31 GMT
Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4993#discussion_r150227018
  
    --- Diff: flink-queryable-state/flink-queryable-state-client-java/src/main/java/org/apache/flink/queryablestate/network/Client.java
---
    @@ -309,31 +323,38 @@ private void handInChannel(Channel channel) {
     		/**
     		 * Close the connecting channel with a ClosedChannelException.
     		 */
    -		private void close() {
    -			close(new ClosedChannelException());
    +		private CompletableFuture<?> close() {
    +			return close(new ClosedChannelException());
     		}
     
     		/**
     		 * Close the connecting channel with an Exception (can be {@code null})
     		 * or forward to the established channel.
     		 */
    -		private void close(Throwable cause) {
    +		private CompletableFuture<?> close(Throwable cause) {
     			synchronized (connectLock) {
    -				if (!closed) {
    +				final CompletableFuture<?> shutdownFuture;
    +				if (closed) {
    +					shutdownFuture = new CompletableFuture<>();
    --- End diff --
    
    shorter: `CompletableFuture.completedFuture(null)`


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