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Posted to issues@hbase.apache.org by "Demai Ni (JIRA)" <ji...@apache.org> on 2013/06/21 03:59:20 UTC
[jira] [Created] (HBASE-8780) a column Family can have VERSIONS
less than zero
Demai Ni created HBASE-8780:
-------------------------------
Summary: a column Family can have VERSIONS less than zero
Key: HBASE-8780
URL: https://issues.apache.org/jira/browse/HBASE-8780
Project: HBase
Issue Type: Bug
Components: Client
Affects Versions: 0.94.8
Reporter: Demai Ni
Priority: Trivial
User can create/alter a columnfam and set its VERSION(aka maxVERSIONS) to a negative or zero value. Although there is a checking in HColumnDesciptor#construtor, hbase shell command will invoke the setter(setMaxVersions and setMinVersions) directly, hence by pass the checking. For example:
{code:title=set VERSIONS = -1}
hbase(main):016:0> create 't5_dn',{NAME=>'cf1',VERSIONS=>-1}
0 row(s) in 1.0420 seconds
hbase(main):017:0> put 't5_dn','row1','cf1:q1','row1cf1_v1'
0 row(s) in 0.0700 seconds
hbase(main):018:0> scan 't5_dn'
ROW COLUMN+CELL
0 row(s) in 0.0090 seconds
hbase(main):019:0> describe 't5_dn'
DESCRIPTION ENABLED
't5_dn', {NAME => 'cf1', REPLICATION_SCOPE => '0', true
KEEP_DELETED_CELLS => 'false', COMPRESSION => 'NONE
', ENCODE_ON_DISK => 'true', BLOCKCACHE => 'true',
MIN_VERSIONS => '0', DATA_BLOCK_ENCODING => 'NONE',
IN_MEMORY => 'false', BLOOMFILTER => 'NONE', TTL =
> '2147483647', VERSIONS => '-1', BLOCKSIZE => '655
36'}
1 row(s) in 0.0410 seconds
{code}
above example shows VERSIONS => '-1', and put/scan doesn't keep the data
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