Kai Zheng updated HADOOP-12579:
    Hadoop Flags: Incompatible change  (was: Reviewed)

> Deprecate and remove WriteableRPCEngine
> ---------------------------------------
>                 Key: HADOOP-12579
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12579
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Haohui Mai
>            Assignee: Kai Zheng
>         Attachments: HADOOP-12579-v1.patch, HADOOP-12579-v10.patch, 
> HADOOP-12579-v11.patch, HADOOP-12579-v3.patch, HADOOP-12579-v4.patch, 
> HADOOP-12579-v5.patch, HADOOP-12579-v6.patch, HADOOP-12579-v7.patch, 
> HADOOP-12579-v8.patch, HADOOP-12579-v9.patch
> The {{WriteableRPCEninge}} depends on Java's serialization mechanisms for RPC 
> requests. Without proper checks, it has be shown that it can lead to security 
> vulnerabilities such as remote code execution (e.g., COLLECTIONS-580, 
> HADOOP-12577).
> The current implementation has migrated from {{WriteableRPCEngine}} to 
> {{ProtobufRPCEngine}} now. This jira proposes to deprecate 
> {{WriteableRPCEngine}} in branch-2 and to remove it in trunk.

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