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https://issues.apache.org/jira/browse/HBASE-5104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13179014#comment-13179014
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Kannan Muthukkaruppan commented on HBASE-5104:
----------------------------------------------
Jiakai also reported that:
<<< There seems to be another problem with ColumnPaginationFilter: it seems to
count multiple versions of a cell as multiple entries. i.e. when I first
applied the ColumnPaginationFilter(10, 0), it returned the first 10 entries in
that CF. Then I wrote the same set of test data to the CF and ran the query
again, it only returned the first 5 entries. The table was created with
maxVersion = 1. I also set Get's maxVersion to 1. However, I repeated the
process several times (over write + query), it kept returning the top 5 entries
(not like 5/2 entries, 5/4 entries if it really kept multiple versions). I
could repo this with a new table. Is it expected behavior?>>>
Looks like there are additional problems with doing pagination support as a
filter.
> FilterList doesn't work right with ColumnPaginationFilter
> ---------------------------------------------------------
>
> Key: HBASE-5104
> URL: https://issues.apache.org/jira/browse/HBASE-5104
> Project: HBase
> Issue Type: Bug
> Reporter: Kannan Muthukkaruppan
> Assignee: Madhuwanti Vaidya
> Attachments: testFilterList.rb
>
>
> Thanks Jiakai Liu for reporting this issue and doing the initial
> investigation. Email from Jiakai below:
> Assuming that we have an index column family with the following entries:
> "tag0:001:thread1"
> ...
> "tag1:001:thread1"
> "tag1:002:thread2"
> ...
> "tag1:010:thread10"
> ...
> "tag2:001:thread1"
> "tag2:005:thread5"
> ...
> To get threads with "tag1" in range [5, 10), I tried the following code:
> ColumnPrefixFilter filter1 = new
> ColumnPrefixFilter(Bytes.toBytes("tag1"));
> ColumnPaginationFilter filter2 = new ColumnPaginationFilter(5 /* limit
> */, 5 /* offset */);
> FilterList filters = new FilterList(Operator.MUST_PASS_ALL);
> filters.addFilter(filter1);
> filters.addFilter(filter2);
> Get get = new Get(USER);
> get.addFamily(COLUMN_FAMILY);
> get.setMaxVersions(1);
> get.setFilter(filters);
> Somehow it didn't work as expected. It returned the entries as if the filter1
> were not set.
> Turns out the ColumnPrefixFilter returns SEEK_NEXT_USING_HINT in some cases.
> The FilterList filter does not handle this return code properly (treat it as
> INCLUDE).
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