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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-2157) LATEST_TIMESTAMP not replaced by current timestamp in KeyValue
Date Fri, 22 Jan 2010 19:04:22 GMT

     [ https://issues.apache.org/jira/browse/HBASE-2157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-2157:
-------------------------

    Attachment: 2157.patch

I added note to the bulk load documentation that warns against creating KVs w/o explicit timestamp
so others don't trip over Menno's issue.

> LATEST_TIMESTAMP not replaced by current timestamp in KeyValue
> --------------------------------------------------------------
>
>                 Key: HBASE-2157
>                 URL: https://issues.apache.org/jira/browse/HBASE-2157
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.2
>         Environment: Hadoop 0.20.0 - Hbase 0.20.2 - Java(TM) SE Runtime Environment (build
1.6.0_17-b04)
>            Reporter: Menno Luiten
>         Attachments: 2157.patch
>
>
> I was trying to bulk load using the new HFileOutputFormat. When using a MapReduce in
which map generates {{KeyValue}}s and reduce is equal to KeyValueSortReducer, and using the
constructor using (byte[] row, byte[] family, byte[] qualifier, byte[] value), the (undefined)
timestamp was inserted as HConstants.LATEST_TIMESTAMP/Long.MAX_VALUE into HBase. This causes
all kinds of troubles, but most importantly, while the records were in the table, other MapReduces
(using TableInputFormat) and Hbase shell's 'get'-command did not fetch them. Guess there is
some sort of filtering of future dates.
> As I understood from St.Ack, the LASTEST_TIMESTAMP is supposed to be replaced by System.currentTimeMillis(),
but I don't see this reflected in the code of KeyValue, and apparently it did not happen elsewhere;
perhaps because there is no actual HBase connection?

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