[jira] [Work logged] (HIVE-21788) Support replication from haddop-2 (hive 3.0 and beelow) on-prem cluster to hadoop-3 (hive 4 and above) cloud cluster

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     [ https://issues.apache.org/jira/browse/HIVE-21788?focusedWorklogId=255636&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-255636 ]

ASF GitHub Bot logged work on HIVE-21788:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 07/Jun/19 04:44
            Start Date: 07/Jun/19 04:44
    Worklog Time Spent: 10m 
      Work Description: maheshk114 commented on pull request #666: HIVE-21788 : Support replication from haddop-2 (hive 3.0 and beelow) on-prem cluster to hadoop-3 (hive 4 and above) cloud cluster
URL: https://github.com/apache/hive/pull/666
 
 
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Issue Time Tracking
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            Worklog Id:     (was: 255636)
            Time Spent: 10m
    Remaining Estimate: 0h

> Support replication from haddop-2 (hive 3.0 and beelow) on-prem cluster to hadoop-3 (hive 4 and above) cloud cluster
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-21788
>                 URL: https://issues.apache.org/jira/browse/HIVE-21788
>             Project: Hive
>          Issue Type: Task
>          Components: HiveServer2, repl
>    Affects Versions: 4.0.0
>            Reporter: mahesh kumar behera
>            Assignee: mahesh kumar behera
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>         Attachments: HIVE-21788.01.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> In case of replication to cloud both dump and load are executed in the source cluster. This push based replication is done to avoid computation at target cloud cluster. In case in the source cluster, strict managed table is not set to true the tables will be non acid. So during replication to a cluster with strict managed table, migration logic same as upgrade tool has to be applied on the replicated data. This migration logic is implemented only in hive4.0. So it's required that a hive 4.0 instance started at the source cluster. If the source cluster has hadoop-2 installation, hive4 has to be built with hadoop-2 and necessary changes are required in the pom files and the shim files.
> 1. Change the pom.xml files to accept a profile for hadoop-2. If hadoop-2 profile is set, the hadoop version should be set accordingly to hadoop-2.
> 2. In shim creare a new file for hadoop-2. Based on the profile the respective file will be included in the build.
> 3. Changed artifactId hadoop-hdfs-client to hadoop-client as in hadoop-2 the jars are stored under hadoop-client folder.
>  
>  
> Command to enable hadop-2 dependency  —  mvn clean install package -DskipTests  -Pdist -pl '!standalone-metastore, !llap-common, !llap-client, !llap-ext-client, !llap-tez, !llap-server, !hbase-handler, !service, !hplsql, !kryo-registrator' -Phadoop-2.7
>  



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