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Date: Mon, 13 Feb 2017 11:07:41 +0000 (UTC)
From: "Bhupendra Kumar Jain (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.13042286.1486821623000.61939.1486984061690@Atlassian.JIRA>
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Subject: [jira] [Commented] (HBASE-17635) enable_table_replication script
 cannot handle replication scope
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archived-at: Mon, 13 Feb 2017 12:22:19 -0000


    [ https://issues.apache.org/jira/browse/HBASE-17635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15863476#comment-15863476 ] 

Bhupendra Kumar Jain commented on HBASE-17635:
----------------------------------------------

HBASE-17460  skips the replication scope attribute comparison while comparing descriptors. I think that should resolve this.

> enable_table_replication script cannot handle replication scope
> ---------------------------------------------------------------
>
>                 Key: HBASE-17635
>                 URL: https://issues.apache.org/jira/browse/HBASE-17635
>             Project: HBase
>          Issue Type: Bug
>          Components: Replication
>    Affects Versions: 1.3.1
>            Reporter: Lars George
>
> When you add a peer, then enable a table for replication using {{enable_table_replication}}, the script will create the table on the peer cluster, but with one difference:
> _Master Cluster_:
> {noformat}
> hbase(main):027:0> describe 'testtable'
> Table testtable is ENABLED                                                                                                                                                                                  
> testtable                                                                                                                                                                                                   
> COLUMN FAMILIES DESCRIPTION                                                                                                                                                                                 
> {NAME => 'cf1', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '1', VERSIONS => '1', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL => 'FOREVER', KEEP_DELETED_CELLS => 'FALSE',
>  BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}                                                                                                                                          
> 1 row(s) in 0.0700 seconds
> {noformat}
> _Peer Cluster_:
> {noformat}
> hbase(main):003:0> describe 'testtable'
> Table testtable is ENABLED                                                                                                                                                                                  
> testtable                                                                                                                                                                                                   
> COLUMN FAMILIES DESCRIPTION                                                                                                                                                                                 
> {NAME => 'cf1', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '0', COMPRESSION => 'NONE', VERSIONS => '1', TTL => 'FOREVER', MIN_VERSIONS => '0', KEEP_DELETED_CELLS => 'FALSE',
>  BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}                                                                                                                                          
> 1 row(s) in 0.1260 seconds
> {noformat}
> Note that the replication scope is different. Removing the peer, adding it again and enabling the table gives this now:
> {noformat}
> hbase(main):026:0> enable_table_replication 'testtable'
> ERROR: Table testtable exists in peer cluster 1, but the table descriptors are not same when compared with source cluster. Thus can not enable the table's replication switch.
> {noformat}
> That is dumb, as it was the same script that enabled the replication scope in the first place. It should skip that particular attribute when comparing the cluster schemas.


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