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https://issues.apache.org/jira/browse/HBASE-17460?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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NITIN VERMA updated HBASE-17460:
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Status: In Progress (was: Patch Available)
Example of new functionality added:
---------------------------------------------------
hbase(main):014:0> enable_table_replication 'table1'
The replication of table 'table1' successfully enabled
Took 0.5180 seconds
hbase(main):016:0> enable_table_replication 'table1'
ERROR: Table table1 has replication already enabled for atleast one Column
Family.
Here is some help for this command:
Enable a table's replication switch.
Examples:
hbase> enable_table_replication 'table_name'
Took 0.1180 seconds
> enable_table_replication can not perform cyclic replication of a table
> ----------------------------------------------------------------------
>
> Key: HBASE-17460
> URL: https://issues.apache.org/jira/browse/HBASE-17460
> Project: HBase
> Issue Type: Bug
> Components: Replication
> Reporter: NITIN VERMA
> Assignee: NITIN VERMA
> Labels: replication
> Attachments: HBASE-17460.patch, HBASE-17460_v2.patch
>
> Original Estimate: 96h
> Remaining Estimate: 96h
>
> The enable_table_replication operation is broken for cyclic replication of
> HBase table as we compare all the properties of column families (including
> REPLICATION_SCOPE).
> Below is exactly what happens:
> 1. Running "enable_table_replication 'table1' " opeartion on first cluster
> will set the REPLICATION_SCOPE of all column families to peer id '1'. This
> will also create a table on second cluster where REPLICATION_SCOPE is still
> set to peer id '0'.
> 2. Now when we run "enable_table_replication 'table1'" on second cluster, we
> compare all the properties of table (including REPLICATION_SCOPE_, which
> obviously is different now.
> I am proposing a fix for this issue where we should avoid comparing
> REPLICATION_SCOPE inside HColumnDescriotor::compareTo() method, especially
> when replication is not already enabled on the desired table.
> I have made that change and it is working. I will submit the patch soon.
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