[HBASE-8780] A column Family can have VERSIONS less than zero

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.94.8
• Fix Version/s: 0.98.0
• Component/s: Client
• Hadoop Flags: Reviewed
• Assignee: Demai Ni
• Reporter: Demai Ni
• Created: 21/Jun/13 01:57
• Updated: 20/Nov/15 11:55
• Resolved: 22/Jul/13 22:27

Description

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:

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

above example shows VERSIONS => '-1', and put/scan doesn't keep the data