Jian Zhang created HADOOP-19235:
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Summary: 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
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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