Hi all,
Here's test code I used for testing purposes and I would like to know the
behavior,
@Test
public void testing() throws IOException {
Connection conn = ConnectionFactory.createConnection(conf);
TableName test = TableName.valueOf("Test");
TableDescriptorBuilder tableDescBuilder =
TableDescriptorBuilder.newBuilder(test);
ColumnFamilyDescriptorBuilder columnDescBuilder =
ColumnFamilyDescriptorBuilder
.newBuilder(Bytes.toBytes("test-family"));
columnDescBuilder.setNewVersionBehavior(true);
ColumnFamilyDescriptor columnDescriptor = columnDescBuilder.build();
tableDescBuilder.addColumnFamily(columnDescriptor);
TableDescriptor tableDescriptor = tableDescBuilder.build();
conn.getAdmin().createTable(tableDescriptor);
Table table = conn.getTable(test);
BufferedMutator bm = conn.getBufferedMutator(test);
Delete del = new Delete(Bytes.toBytes("com.example/http"));
del.addColumn(Bytes.toBytes("test-family"), Bytes.toBytes("test-qualifier"));
bm.mutate(del);
Put put = new Put(Bytes.toBytes("com.example/http"));
put.addColumn(Bytes.toBytes("test-family"),
Bytes.toBytes("test-qualifier"), Bytes.toBytes("test-value"));
bm.mutate(put);
put = new Put(Bytes.toBytes("com.example/http"));
put.addColumn(Bytes.toBytes("test-family"),
Bytes.toBytes("test-qualifier"), Bytes.toBytes("test-value-2"));
bm.mutate(put);
bm.flush();
bm.close();
Get get = new Get(Bytes.toBytes("com.example/http"));
get.addColumn(Bytes.toBytes("test-family"), Bytes.toBytes("test-qualifier"));
Result result = table.get(get);
byte [] val = result.getValue(Bytes.toBytes("test-family"),
Bytes.toBytes("test-qualifier"));
if(val == null) {
// Testing purposes
}
}
I would like to know the exact behavior of value val variable here,
when NEW_VERSION_BEHAVIOR
is true. Above code when it is executed returns null as value for val
variable. As I can see, delete overshadows the subsequent puts.
Regards
Kevin
On Mon, Apr 15, 2019 at 2:05 PM Kevin Ratnasekera <djkevincr1...@gmail.com>
wrote:
> Update:
> Found out that above delete row works all columns which have non null
> qualifier. Delete doesn't work for puts with column qualifier is null.
>
> On related note,
>
> Delete delete = new Delete(keyRaw);
>
> delete.addFamily(hcol.getFamily());
>
> Let's say I need to perform delete on all columns created inside a family
> in a particular row, once I execute above delete operation, I am not be
> able to do put operation on the same row same column family.
>
> Is there something I am missing here?
>
> Regards
>
> Kevin
>
>
> On Mon, Apr 15, 2019 at 12:20 AM Kevin Ratnasekera <
> djkevincr1...@gmail.com> wrote:
>
>> Hi all,
>>
>> I am from Apache Gora project. I currently in the process of upgrade our
>> HBase dependencies to 2.0.5. We faced the issue described in [1] and had to
>> put workarounds to get through it some time back. ( By timestamps ) Now I
>> started to test NEW_VERSION_BEHAVIOR and I noticed even trivial row deletes
>> fails when NEW_VERSION_BEHAVIOR is set to true.
>>
>> Delete del = new Delete(toBytes(key));
>>
>> table = connection.getTable(tableName);
>>
>> table.delete(del);
>> Result result = table.get(new Get(toBytes(key)));
>>
>> Here Get returns some cells which are marked for delete. ( Some columns
>> are deleted and some are not ) These deletes works fine when
>> NEW_VERSION_BEHAVIOR is set to false. Please note I do this tests using
>> HBaseTestingUtility
>> minicluster.
>>
>> Are there any known issues with NEW_VERSION_BEHAVIOR with deletes? It
>> would be really helpful if someone can give some pointers to debug the root
>> cause of this.
>>
>> [1] https://issues.apache.org/jira/browse/HBASE-2256
>>
>> Regards
>> Kevin
>>
>
