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https://issues.apache.org/jira/browse/HADOOP-18487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-18487:
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Release Note:
hadoop modules no longer export protobuf-2.5.0 as a dependency, and it is
omitted from the hadoop distribution directory. Applications which use the
library must declare an explicit dependency.
Hadoop uses a shaded version of protobuf3 internally, and does not use the
2.5.0 JAR except when compiling compatible classes
> protobuf-2.5.0 dependencies => provided
> ---------------------------------------
>
> Key: HADOOP-18487
> URL: https://issues.apache.org/jira/browse/HADOOP-18487
> Project: Hadoop Common
> Issue Type: Improvement
> Components: build, ipc
> Affects Versions: 3.3.4
> Reporter: Steve Loughran
> Priority: Major
>
> uses of protobuf 2.5 and RpcEnginej have been deprecated since 3.3.0 in
> HADOOP-17046
> while still keeping those files around (for a long time...), how about we
> make the protobuf 2.5.0 export off hadoop common and hadoop-hdfs *provided*,
> rather than *compile*
> that way, if apps want it for their own apis, they have to explicitly ask for
> it, but at least our own scans don't break.
> i have no idea what will happen to the rest of the stack at this point, it
> will be "interesting" to see
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