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Posted to hdfs-issues@hadoop.apache.org by "Gautham Banasandra (Jira)" <ji...@apache.org> on 2022/07/23 17:52:00 UTC

[jira] [Resolved] (HDFS-16467) Ensure Protobuf generated headers are included first

     [ https://issues.apache.org/jira/browse/HDFS-16467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gautham Banasandra resolved HDFS-16467.
---------------------------------------
    Fix Version/s: 3.4.0
       Resolution: Fixed

Merged PR [https://github.com/apache/hadoop/pull/4601] to trunk.

> Ensure Protobuf generated headers are included first
> ----------------------------------------------------
>
>                 Key: HDFS-16467
>                 URL: https://issues.apache.org/jira/browse/HDFS-16467
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: libhdfs++
>    Affects Versions: 3.4.0
>         Environment: Windows 10
>            Reporter: Gautham Banasandra
>            Assignee: Gautham Banasandra
>            Priority: Major
>              Labels: libhdfscpp, pull-request-available
>             Fix For: 3.4.0
>
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> We need to ensure that the Protobuf generated headers ([such as ClientNamenodeProtocol.pb.h|https://github.com/apache/hadoop/blob/cce5a6f6094cefd2e23b73d202cc173cf4fc2cc5/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/connection/datanodeconnection.h#L23]) are included at the top. In other words, **.ph.h* should be the first header files to be included in any of the .c/.cc/.h files. Otherwise, it causes symbol redefinition errors during compilation. Also, we need to ensure that Protobuf generated header files are the first ones to be included even in the case of *transitive inclusion* of header files.
> This issue seems to be specific to Windows only. Not sure why the other platforms aren't running into this.



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