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https://issues.apache.org/jira/browse/HBASE-12329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14182836#comment-14182836
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Sean Busbey commented on HBASE-12329:
-------------------------------------
I'd say add a new method for the update case (setFamily? updateFamily?) and
have the modify call use that.
We'll need to release note the change in behavior. Even though the API is
flagged as Evolving we're probably best off saving the exception throwing for
2.0 and doing a warning cycle. That'd mean getting the new method and a javadoc
warning (about how it will be an error and how last-write-wins right now) into
branch-1 and maybe 0.98. The shell can warn in all versions.
> 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
>
> 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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