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https://issues.apache.org/jira/browse/HDFS-17544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17852856#comment-17852856
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ASF GitHub Bot commented on HDFS-17544:
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KeeProMise opened a new pull request, #6870:
URL: https://github.com/apache/hadoop/pull/6870
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### Description of PR
Please see : https://issues.apache.org/jira/browse/HDFS-17544
### How was this patch tested?
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
> [ARR] The router client rpc protocol supports asynchrony.
> ---------------------------------------------------------
>
> Key: HDFS-17544
> URL: https://issues.apache.org/jira/browse/HDFS-17544
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Jian Zhang
> Assignee: Jian Zhang
> Priority: Major
> Labels: pull-request-available
>
> *Describe*
> In order not to affect other modules, when implementing router asynchronous
> client rpc protocolPB, it mainly extends the original protocolPB; The
> implemented protocolPB is as follows:
> *RouterClientProtocolTranslatorPB* extends ClientNamenodeProtocolTranslatorPB
> *RouterGetUserMappingsProtocolTranslatorPB* extends
> GetUserMappingsProtocolClientSideTranslatorPB
> *RouterNamenodeProtocolTranslatorPB* extends NamenodeProtocolTranslatorPB
> *RouterRefreshUserMappingsProtocolTranslatorPB* extends
> RefreshUserMappingsProtocolClientSideTranslatorPB
> Then let the router's *ConnectionPool* use the aforementioned protocolPB
> In the implementation of asynchronous Rpc.client, the main methods used
> include HADOOP-13226, HDFS-10224, etc
> {*}AsyncRpcProtocolPBUtil{*}: Make the implementation of asynchronous rpc
> protocol more concise and clear.
>
> *Test*
> I modified RouterRpcClient to use asynchronous client protocolPB for testing.
>
> {*}Note{*}: For a discussion on the AsyncUtil introduced by this PR, please
> refer to it HDFS-17543 This PR requires the use of this tool; Please ignore
> the modification of RouterRpcClient, just for the convenience of testing the
> asynchronous client mentioned above.
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