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From "Zhihong Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-3271) Allow .META. table to be exported
Date Thu, 23 Aug 2012 04:39:42 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13440051#comment-13440051
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Zhihong Ted Yu commented on HBASE-3271:
---------------------------------------

Please address my comment @ 22/Aug/12 18:03 and attach new patch.

Thanks
                
> Allow .META. table to be exported
> ---------------------------------
>
>                 Key: HBASE-3271
>                 URL: https://issues.apache.org/jira/browse/HBASE-3271
>             Project: HBase
>          Issue Type: Improvement
>          Components: util
>    Affects Versions: 0.20.6
>            Reporter: Ted Yu
>             Fix For: 0.96.0
>
>         Attachments: HBASE-3271.patch
>
>
> I tried to export .META. table in 0.20.6 and got:
> [hadoop@us01-ciqps1-name01 hbase]$ bin/hbase org.apache.hadoop.hbase.mapreduce.Export
.META. h-meta 1 0 0
> 10/11/23 20:59:05 INFO jvm.JvmMetrics: Initializing JVM Metrics with processName=JobTracker,
sessionId=
> 2010-11-23 20:59:05.255::INFO:  Logging to STDERR via org.mortbay.log.StdErrLog
> 2010-11-23 20:59:05.255::INFO:  verisons=1, starttime=0, endtime=9223372036854775807
> 10/11/23 20:59:05 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.2.2-888565,
built on 12/08/2009 21:51 GMT
> 10/11/23 20:59:05 INFO zookeeper.ZooKeeper: Client environment:host.name=us01-ciqps1-name01.carrieriq.com
> 10/11/23 20:59:05 INFO zookeeper.ZooKeeper: Client environment:java.version=1.6.0_21
> 10/11/23 20:59:05 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Sun Microsystems
Inc.
> ...
> 10/11/23 20:59:05 INFO zookeeper.ClientCnxn: Server connection successful
> 10/11/23 20:59:05 DEBUG zookeeper.ZooKeeperWrapper: Read ZNode /hbase/root-region-server
got 10.202.50.112:60020
> 10/11/23 20:59:05 DEBUG client.HConnectionManager$TableServers: Found ROOT at 10.202.50.112:60020
> 10/11/23 20:59:05 DEBUG client.HConnectionManager$TableServers: Cached location for .META.,,1
is us01-ciqps1-grid02.carrieriq.com:60020
> Exception in thread "main" java.io.IOException: Expecting at least one region.
>         at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.getSplits(TableInputFormatBase.java:281)
>         at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:885)
>         at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:779)
>         at org.apache.hadoop.mapreduce.Job.submit(Job.java:432)
>         at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:447)
>         at org.apache.hadoop.hbase.mapreduce.Export.main(Export.java:146)
> Related code is:
>     if (keys == null || keys.getFirst() == null ||
>         keys.getFirst().length == 0) {
>       throw new IOException("Expecting at least one region.");
>     }
> My intention was to save the dangling rows in .META. (for future investigation) which
prevented a table from being created.

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