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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6912) Filters are not properly applied in certain cases
Date Thu, 04 Oct 2012 11:43:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13469303#comment-13469303
] 

Hudson commented on HBASE-6912:
-------------------------------

Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #207 (See [https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/207/])
    HBASE-6912 Filters are not properly applied in certain cases (revert HBASE-6562) (Revision
1393853)

     Result = SUCCESS
larsh : 
Files : 
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFakeKeyInFilter.java
* /hbase/trunk/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java

                
> Filters are not properly applied in certain cases
> -------------------------------------------------
>
>                 Key: HBASE-6912
>                 URL: https://issues.apache.org/jira/browse/HBASE-6912
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.1
>            Reporter: Alex Newman
>            Assignee: Lars Hofhansl
>             Fix For: 0.94.2, 0.96.0
>
>         Attachments: 6912-0.94.txt, 6912-0.96.txt, minimalTest.java
>
>
> Steps to reproduce:
> Create a table, load data into it. Flush the table.
> Do a scan with
> 1. Some filter which should not match the first entry in the scan
> 2. Where one specifies a family and column.
> You will notice that the first entry is returned even though it doesn't match the filter.
> It looks like the when the first KeyValue of a scan in the column from the point of view
of the code
> HRegion.java
> {code}
> } else if (kv != null && !kv.isInternal() && filterRowKey(currentRow))
{
> {code}
> Is generated by
> {code}
> public static KeyValue createLastOnRow(final byte [] row,
> final int roffset, final int rlength, final byte [] family,
> final int foffset, final int flength, final byte [] qualifier,
> final int qoffset, final int qlength) { return new KeyValue(row, roffset, rlength, family,
foffset, flength, qualifier, qoffset, qlength, HConstants.OLDEST_TIMESTAMP, Type.Minimum,
null, 0, 0); }
> {code}
> So it is always internal from that point of the code.
> Only later from within
> StoreScanner.java
> {code}
> public synchronized boolean next(List<KeyValue> outResult, int limit, String metric)
throws IOException {
> ....
> LOOP: while((kv = this.heap.peek()) != null) {
> {code}
> ( The second time through)
> Do we get the actual kv, with a proper type and timestamp. This seems to mess with filtering.

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