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https://issues.apache.org/jira/browse/HBASE-6132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13285363#comment-13285363
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Anoop Sam John commented on HBASE-6132:
---------------------------------------
The problem is with the below code
In FilterList.java
{code}
public boolean filterRow() {
for (Filter filter : filters) {
if (operator == Operator.MUST_PASS_ALL) {
if (filter.filterAllRemaining() || filter.filterRow()) {
return true;
}
} else if (operator == Operator.MUST_PASS_ONE) {
if (!filter.filterAllRemaining()
&& !filter.filterRow()) {
return false;
}
}
}
return operator == Operator.MUST_PASS_ONE;
}
{code}
Here filterRow checks for filterAllRemaining() also.
In the issue case, the desirable number of KVs are included and remaining
filtered out using the ColumnCountGetFilter. This filter implements the
filterAllRemaining() also which returns true once the desirable number of KVs
are included. Later when the filterRow is called, as per the above code it
will call the filterAllRemaining() on ColumnCountGetFilter and this row also
will get avoided.
Same issue with PaginationFilter where the desired number of rows suppose 10.
9 rows will get included and once 10th row is reached because of the
filterAllRemaining() returns true from then onwards, the 10th row wont get
included.
Why filterRow() impl of FilterList check with the filterAllRemaining() on the
contained filters?
> ColumnCountGetFilter & PageFilter not working with FilterList
> -------------------------------------------------------------
>
> Key: HBASE-6132
> URL: https://issues.apache.org/jira/browse/HBASE-6132
> Project: HBase
> Issue Type: Bug
> Components: filters
> Affects Versions: 0.92.0, 0.92.1, 0.94.0
> Environment: Cent OS 5.5 distributed hbase cluster. Hadoop 1.0.0,
> zookeeper 3.4.3
> Reporter: Benjamin Kim
>
> Thanks to Anoop and Ramkrishna, here's what we found with FilterList
> If I use FilterList to include ColumnCountGetFilter among other filters, the
> returning Result has no keyvalues.
> This problem seems to occur when specified column count is less then actual
> number of existing columns.
> Also same problem arises with PageFilter
> Following is the code of the problem:
> Configuration conf = HBaseConfiguration.create();
> HTable table = new HTable(conf, "test");
> Get get = new Get(Bytes.toBytes("test00001"));
> FilterList filterList = new FilterList();
> filterList.addFilter(new ColumnCountGetFilter(100));
> get.setFilter(filterList);
> Result r = table.get(get);
> System.out.println(r.size()); // prints zero
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