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https://issues.apache.org/jira/browse/HBASE-20270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16452351#comment-16452351
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Sean Busbey commented on HBASE-20270:
-------------------------------------
[~jatsakthi] would you mind coming up with a release note? since this is marked
as incompatible it'll be called out in the release notes we generate. Just
something short about what changed and what folks will need to do to get the
same information as before.
> Turn off command help that follows all errors in shell
> ------------------------------------------------------
>
> Key: HBASE-20270
> URL: https://issues.apache.org/jira/browse/HBASE-20270
> Project: HBase
> Issue Type: Task
> Components: shell
> Affects Versions: 2.0.0
> Reporter: Sean Busbey
> Assignee: Sakthi
> Priority: Major
> Fix For: 2.0.0
>
> Attachments: hbase-20270.master.001.patch,
> hbase-20270.master.002.patch, hbase-20270.master.003.patch,
> hbase-20270.master.004.patch, hbase-20270.master.005.patch,
> hbase-20270.master.006.patch
>
>
> Right now if a shell command gives an error, any error, it then echos the
> command help. It makes it harder to see the actual error text and is annoying.
> example:
> {code}
>
>
>
> hbase(main):007:0> create 'test:a_table', 'family', { NUMREGIONS => 20,
> SPLITALGO => 'HexStringSplit'}
> ERROR: Unknown namespace test!
> Creates a table. Pass a table name, and a set of column family
> specifications (at least one), and, optionally, table configuration.
> Column specification can be a simple string (name), or a dictionary
> (dictionaries are described below in main help output), necessarily
> including NAME attribute.
> Examples:
> Create a table with namespace=ns1 and table qualifier=t1
> hbase> create 'ns1:t1', {NAME => 'f1', VERSIONS => 5}
> Create a table with namespace=default and table qualifier=t1
> hbase> create 't1', {NAME => 'f1'}, {NAME => 'f2'}, {NAME => 'f3'}
> hbase> # The above in shorthand would be the following:
> hbase> create 't1', 'f1', 'f2', 'f3'
> hbase> create 't1', {NAME => 'f1', VERSIONS => 1, TTL => 2592000,
> BLOCKCACHE => true}
> hbase> create 't1', {NAME => 'f1', CONFIGURATION =>
> {'hbase.hstore.blockingStoreFiles' => '10'}}
> hbase> create 't1', {NAME => 'f1', IS_MOB => true, MOB_THRESHOLD =>
> 1000000, MOB_COMPACT_PARTITION_POLICY => 'weekly'}
> Table configuration options can be put at the end.
> Examples:
> hbase> create 'ns1:t1', 'f1', SPLITS => ['10', '20', '30', '40']
> hbase> create 't1', 'f1', SPLITS => ['10', '20', '30', '40']
> hbase> create 't1', 'f1', SPLITS_FILE => 'splits.txt', OWNER => 'johndoe'
> hbase> create 't1', {NAME => 'f1', VERSIONS => 5}, METADATA => { 'mykey' =>
> 'myvalue' }
> hbase> # Optionally pre-split the table into NUMREGIONS, using
> hbase> # SPLITALGO ("HexStringSplit", "UniformSplit" or classname)
> hbase> create 't1', 'f1', {NUMREGIONS => 15, SPLITALGO => 'HexStringSplit'}
> hbase> create 't1', 'f1', {NUMREGIONS => 15, SPLITALGO => 'HexStringSplit',
> REGION_REPLICATION => 2, CONFIGURATION =>
> {'hbase.hregion.scan.loadColumnFamiliesOnDemand' => 'true'}}
> hbase> create 't1', {NAME => 'f1', DFS_REPLICATION => 1}
> You can also keep around a reference to the created table:
> hbase> t1 = create 't1', 'f1'
> Which gives you a reference to the table named 't1', on which you can then
> call methods.
> Took 0.0221 seconds
>
>
> hbase(main):008:0> create_namespace 'test'
> Took 0.2554 seconds
>
>
> hbase(main):009:0> create 'test:a_table', 'family', { NUMREGIONS => 20,
> SPLITALGO => 'HexStringSplit'}
> Created table test:a_table
> Took 1.2264 seconds
> {code}
> I was trying to make a table in the test namespace before making the
> namespace. Much faster to recognize and move on when the error text isn't
> followed by 80x the text.
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