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https://issues.apache.org/jira/browse/BOOKKEEPER-702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13822290#comment-13822290
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Flavio Junqueira commented on BOOKKEEPER-702:
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Hi Steve, My understanding is that folks felt that it would be best to shade so
that we don't have to be in sync with HDFS with respect to the version of
protobuf. BK has other applications other than Hadoop/HDFS, so following HDFS
on the version of protobuf might end up forcing those applications to upgrade
too.
> Upgrade protobuf-java to 2.5.0 version
> --------------------------------------
>
> Key: BOOKKEEPER-702
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-702
> Project: Bookkeeper
> Issue Type: Improvement
> Reporter: Rakesh R
> Assignee: Rakesh R
> Priority: Blocker
> Fix For: 4.4.0
>
> Attachments: 0001-BOOKKEEPER-702.patch, 0002-BOOKKEEPER-702.patch
>
>
> HDFS is using BK for the shared memory approach through BKJM plugin.
> Presently HDFS is using Bookkeeper4.0.0 version and when tries to upgrade to
> latest 4.2.2 version, there is a conflicts in protobuf versions between the
> components. Latest HDFS 2.1 branch is using protobuf-java-2.5.0 version, but
> BK has protobuf-java-2.4.1 version.
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