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https://issues.apache.org/jira/browse/HBASE-1409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711026#action_12711026
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stack commented on HBASE-1409:
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Should we try and fix this for 0.19.3?
> table TTL expires before its real expiration time which cause row key
> disappear from Scanner
> --------------------------------------------------------------------------------------------
>
> Key: HBASE-1409
> URL: https://issues.apache.org/jira/browse/HBASE-1409
> Project: Hadoop HBase
> Issue Type: Bug
> Components: client
> Affects Versions: 0.19.1
> Environment: Linux jdc2-atr-dc-2 2.6.18-92.1.22.el5 #1 SMP Tue Dec 16
> 11:57:43 EST 2008 x86_64 x86_64 x86_64 GNU/Linux
> Hadoop 0.19.1 (r745977) and HBase 0.19.1 (r745977) release candidate.
> Reporter: Andy Lee
> Assignee: Andrew Purtell
> Original Estimate: 120h
> Remaining Estimate: 120h
>
> When we create a table with the following schema:
> {NAME => 'jobs_global', IS_ROOT => 'false', IS_META => 'false', MAX_FILESIZE
> => '134217728', FAMILIES => [{NAM
> E => 'job', BLOOMFILTER => 'false', COMPRESSION => 'NONE', VERSIONS => '1',
> LENGTH => '2147483647', TTL => '86
> 400', IN_MEMORY => 'false', BLOCKCACHE => 'false'}], INDEXES => []}
> The TTL is set to 86400 which should expire after 1 day, but the truth is
> that it expired before 86400 seconds.
> To reproduce, create a table with the above schema and run some stress
> testing to create some splits and compaction,
> usually in 4 - 5 hours, the row key will start missing from the Scanners.
> By invoking HTable.get() and HTable.getRow(), the column appears to exist.
> But if you launch a scanner or a MapReduce task to scan the table, the key
> will be missing.
> By running a simple MapReduce task that prints out all the key value, you can
> tell some keys are already missing prior to its expiration time.
> When we alter the table's TTL to a longer time, e.g. 604800, the row key
> appears in the scanner.
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