mahesh kumar behera created HIVE-21788:
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Summary: 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
Fix For: 4.0.0
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.
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