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https://issues.apache.org/jira/browse/HADOOP-10995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14108753#comment-14108753
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Zhijie Shen commented on HADOOP-10995:
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bq. In general, I'm opposed to create circular dependency by putting hbase
dependency into the pom.
I'm not sure we should simply conclude cyclic dependency that hbase depends on
hadoop and hadoop depends on hbase now, because both projects are divided into
multiple artifacts. In YARN-2032, in
hadoop-yarn-server-applicatioinhistoryservice, we only want to add hbase-client
and hbase-testing-util, which have dependency on hadoop-common, hadoop-auth,
hadoop-hdfs, hadoop-mapreduce-client-core and some others. However, none of
them actually depend on hadoop-yarn-server-applicatioinhistoryservice,
resulting in cyclic dependency. Therefore, with the attached dependency change,
the project is built secussefully. In fact, you can consider
hadoop-yarn-server-applicatioinhistoryservice as an independent project that
depends on hadoop-common, as hbase-client/hbase-testing-util does. The
dependency is still going to be a DAG after the change.
bq. This change assumes binary compatibilities of hadoop-common and hadoop-auth
between trunk and 2.x.
As hbase 0.9x is built against branch-2. It's going to be binary incompatible
against trunk, and this is why I raised the this Jira. However, this Jira is
not aiming to ensure thorough binary compatibility between trunk and 2.x, but
getting back the necessary pieces to unblock the tests against hbase mini
cluster. Once the new version hbase dependency rebases to the new API (i.e.,
HttpServer2 and Syncable.hsync), These pieces should be safe to be removed.
Hopefully it's a fair point.
> HBase cannot run correctly with Hadoop trunk
> --------------------------------------------
>
> Key: HADOOP-10995
> URL: https://issues.apache.org/jira/browse/HADOOP-10995
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Zhijie Shen
> Assignee: Zhijie Shen
> Priority: Critical
> Attachments: HADOOP-10995.1.patch, YARN-2032.dependency.patch
>
>
> Several incompatible changes that happened on trunk but not on branch-2 have
> broken the compatibility for HBbase:
> HADOOP-10348
> HADOOP-8124
> HADOOP-10255
> In general, HttpServer is and Syncable.sync have been missed.
> It blocks YARN-2032, which makes timeline sever support HBase store.
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