NITIN VERMA commented on HBASE-17460:

Could someone please assign this to me? 
CC: [~enis]

> 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
>              Labels: replication
>   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 
> 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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