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Date: Fri, 31 Oct 2014 13:18:34 +0000 (UTC)
From: "Jingcheng Du (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Updated] (HBASE-12329) Table create with duplicate column
 family names quietly succeeds
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     [ https://issues.apache.org/jira/browse/HBASE-12329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jingcheng Du updated HBASE-12329:
---------------------------------
    Attachment: HBASE-12329-V2.diff

The latest patch is uploaded.

bq. either update the API example in the ref guide (currently Example 10.2) to show "update an existing CF" or file a follow on ticket that such docs are needed
I think it's better to be done by Misty for the ref guide? 
Hi, [~misty], do you want to update the ref guide(currently Example 10.2 to show "update an existing CF" with the new API modifyFamily in master) after this JIRA is committed? Thanks a lot!

Hi all, please be noted, this patch is targeted to master. If it's backported to lower versions, should have the "last one wins" warning in addFamily method instead of throwing a runtime exception.

Thanks.

> Table create with duplicate column family names quietly succeeds
> ----------------------------------------------------------------
>
>                 Key: HBASE-12329
>                 URL: https://issues.apache.org/jira/browse/HBASE-12329
>             Project: HBase
>          Issue Type: Bug
>          Components: Client, shell
>            Reporter: Sean Busbey
>            Assignee: Jingcheng Du
>            Priority: Minor
>         Attachments: HBASE-12329-V2.diff, HBASE-12329.diff
>
>
> From the mailing list
> {quote}
> I was expecting that it is forbidden, **but** this call does not throw any
> exception
> {code}
>         String[] families = {"cf", "cf"};
>         HTableDescriptor desc = new HTableDescriptor(name);
>         for (String cf : families) {
>           HColumnDescriptor coldef = new HColumnDescriptor(cf);
>           desc.addFamily(coldef);
>         }
>         try {
>             admin.createTable(desc);
>         } catch (TableExistsException e) {
>             throw new IOException("table \'" + name + "\' already exists");
>         }
> {code}
> {quote}
> And Ted's follow up replicates in the shell
> {code}
> hbase(main):001:0> create 't2', {NAME => 'f1'}, {NAME => 'f1'}
> The table got created - with 1 column family:
> hbase(main):002:0> describe 't2'
> DESCRIPTION
>                        ENABLED
>  't2', {NAME => 'f1', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW',
> REPLICATION_SCOPE => '0 true
>  ', VERSIONS => '1', COMPRESSION => 'NONE', MIN_VERSIONS => '0', TTL =>
> '2147483647', KEEP_DELETED
>  _CELLS => 'false', BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE
> => 'true'}
> 1 row(s) in 0.1000 seconds
> {code}


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