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Date: Mon, 16 Jun 2008 20:29:45 -0700 (PDT)
From: "Rong-En Fan (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Created: (HBASE-693) TestGet2::testGetClosestRowBefore()
 failed with NPE after HADOOP-3472
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TestGet2::testGetClosestRowBefore() failed with NPE after HADOOP-3472
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                 Key: HBASE-693
                 URL: https://issues.apache.org/jira/browse/HBASE-693
             Project: Hadoop HBase
          Issue Type: Bug
          Components: regionserver
    Affects Versions: 0.2.0
         Environment: hadoop 0.17.0 + HADOOP-3472, HBase latest trunk
            Reporter: Rong-En Fan


After HADOOP-3472, MapFile.getClosest(.., ..., true) gives the correct value.
In the unit test, we have 

10
20
30
35 <== deleted
40 

in the MapFile. so in HStore.java's rowAtOrBeforeFromMapFile(MapFile.reader, bytes, ...)

readkey = (HStoreKey)map.getClosest(searchKey, readval, true);

it gets the deleted key 35. So it can not be added into candidateKeys.
The next key is 40, which is after the search key 38. So, we ends up 
with empty candidateKeys. Therefore, we lastKey() is null. cause TestGet2.java
line 236 failed with NPE.

Since MapFile.Reader has no prev(key) method, not sure what's the best
to do in HStore.java.

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