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https://issues.apache.org/jira/browse/HBASE-686?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoni updated HBASE-686:
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Attachment: scanner-test-for.ver.0.2.0.dev.jar.jar
it's test case for ver 0.2.0 dev from trunk. - sources inside the jar package
this is class with main method which do :
1) creates table - if it doesn't exist
2) create BatchUpdate with a "rowKey" and commit into a table
3) make - getRow with "rowKey" - and shows on console data in this row
4) make - getScanner on whole table and shows all rows - and counts how many
rows scanner returns
it returns :
table : testTable exists.
data inserted
-------------------------------------
getRow :
isEmpty = false
row key = 0000
col val = testvalue
-------------------------------------
getScanner :
scanner find : 0 rows in this table.
done.
what does it mean ?
getRow can gets data by rowKey - this data exists in table, but the scanner
doesn't see this row - and return 0 rows.
Antoni
> MemcacheScanner didn't return the first row(if it exists), cause
> HScannerInterface's output incorrect
> -----------------------------------------------------------------------------------------------------
>
> Key: HBASE-686
> URL: https://issues.apache.org/jira/browse/HBASE-686
> Project: Hadoop HBase
> Issue Type: Bug
> Affects Versions: 0.1.2
> Reporter: LN
> Assignee: Jim Kellerman
> Attachments: HBASE-686.patch, HBASE_686.java, HBASE_686.java,
> scanner-test-for.ver.0.2.0.dev.jar.jar, TestHMemcache.java
>
>
> HTable.obtainScanner methods should return the start row if it exists,
> although HTable's javadoc didn't clearly desc. but i found the result of
> htable scanners sometimes contain the start row, sometimes not.
> after more testing and code review, i found it should be a bug in
> HStore.Memcache.MemcacheScanner. in the constructor it set this.currentRow =
> firstRow, but when doing next(), there's a this.currentRow =
> getNextRow(this.currentRow) before fetch result.
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