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https://issues.apache.org/jira/browse/HBASE-5604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13253607#comment-13253607
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Zhihong Yu commented on HBASE-5604:
-----------------------------------
Looking at test failure reported by Hadoop QA:
https://builds.apache.org/job/PreCommit-HBASE-Build/1514//testReport/org.apache.hadoop.hbase.mapreduce/TestWALPlayer/testTimeFormat/
{code}
java.lang.AssertionError: expected:<1334092861001> but was:<1334067661001>
{code}
I wonder if timezone could be an issue here - the difference is 7 hours.
If you don't want to involve call such as
setTimeZone(TimeZone.getTimeZone(“America/Los_Angeles”)), please comment out:
{code}
assertEquals(1334092861001L, conf.getLong(HLogInputFormat.END_TIME_KEY, 0));
{code}
> M/R tool to replay WAL files
> ----------------------------
>
> Key: HBASE-5604
> URL: https://issues.apache.org/jira/browse/HBASE-5604
> Project: HBase
> Issue Type: New Feature
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Fix For: 0.94.0, 0.96.0
>
> Attachments: 5604-v10.txt, 5604-v11.txt, 5604-v4.txt, 5604-v6.txt,
> 5604-v7.txt, 5604-v8.txt, 5604-v9.txt, HLog-5604-v3.txt
>
>
> Just an idea I had. Might be useful for restore of a backup using the HLogs.
> This could an M/R (with a mapper per HLog file).
> The tool would get a timerange and a (set of) table(s). We'd pick the right
> HLogs based on time before the M/R job is started and then have a mapper per
> HLog file.
> The mapper would then go through the HLog, filter all WALEdits that didn't
> fit into the time range or are not any of the tables and then uses
> HFileOutputFormat to generate HFiles.
> Would need to indicate the splits we want, probably from a live table.
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