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https://issues.apache.org/jira/browse/HADOOP-19235?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz-wo Sze updated HADOOP-19235:
--------------------------------
Fix Version/s: 3.5.0
Hadoop Flags: Reviewed
Assignee: Jian Zhang
Resolution: Fixed
Status: Resolved (was: Patch Available)
The pull request is now merged. Thanks, [~Keepromise]!
> IPC client uses CompletableFuture to support asynchronous operations.
> ---------------------------------------------------------------------
>
> Key: HADOOP-19235
> URL: https://issues.apache.org/jira/browse/HADOOP-19235
> Project: Hadoop Common
> Issue Type: New Feature
> Components: common
> Reporter: Jian Zhang
> Assignee: Jian Zhang
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.0
>
> Attachments: HADOOP-19235.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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