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https://issues.apache.org/jira/browse/HDFS-17552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17863646#comment-17863646
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ASF GitHub Bot commented on HDFS-17552:
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KeeProMise commented on PR #6888:
URL: https://github.com/apache/hadoop/pull/6888#issuecomment-2212877266
@goiri @simbadzina @Hexiaoqiao @sjlee @ayushtkn
Hi, if you have time, please help to take a look at this PR, thanks!
> [ARR] IPC client uses CompletableFuture to support asynchronous operations.
> ---------------------------------------------------------------------------
>
> Key: HDFS-17552
> URL: https://issues.apache.org/jira/browse/HDFS-17552
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Jian Zhang
> Assignee: Jian Zhang
> Priority: Major
> Labels: pull-request-available
> Attachments: HDFS-17552.patch
>
>
> h3. Description
> In the implementation of asynchronous Ipc.client, the main methods used
> include HADOOP-13226, HDFS-10224, etc.
> However, the existing implementation does not support `CompletableFuture`;
> instead, it relies on setting up callbacks, which can lead to the "callback
> hell" problem. Using `CompletableFuture` can better organize asynchronous
> callbacks. Therefore, on the basis of the existing implementation, by using
> `CompletableFuture`, once the `client.call` is completed, the asynchronous
> thread handles the response of this call without blocking the main thread.
>
> *Test*
> new UT TestAsyncIPC#testAsyncCallWithCompletableFuture()
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