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Posted to hdfs-issues@hadoop.apache.org by "Jian Zhang (Jira)" <ji...@apache.org> on 2024/06/13 16:20:00 UTC

[jira] [Created] (HDFS-17552) [ARR] RPC client uses CompletableFuture to support asynchronous operations.

Jian Zhang created HDFS-17552:
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             Summary: [ARR] RPC 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


h3. Description

In the implementation of asynchronous Rpc.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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