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Posted to issues@hbase.apache.org by "liang xie (JIRA)" <ji...@apache.org> on 2012/08/22 07:44:38 UTC
[jira] [Commented] (HBASE-3271) Allow .META. table to be exported
[ https://issues.apache.org/jira/browse/HBASE-3271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13439295#comment-13439295 ]
liang xie commented on HBASE-3271:
----------------------------------
I tested as following steps:
1) ran new test case : mvn test -P localTests -Dtest=org.apache.hadoop.hbase.mapreduce.TestImportExport
Failed as expected:
Running org.apache.hadoop.hbase.mapreduce.TestImportExport
2012-08-22 13:18:03.351 java[2329:1903] Unable to load realm info from SCDynamicStore
Tests run: 3, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 124.011 sec <<< FAILURE!
Results :
Tests in error:
testMetaExport(org.apache.hadoop.hbase.mapreduce.TestImportExport): Expecting at least one region.
Tests run: 3, Failures: 0, Errors: 1, Skipped: 0
2) After applied patch, the test case passed as expected
3) Finally, i verified sucessfully at a real cluster manually as well
> 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
> 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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