Facing issues in Import tool

[Stuti Awasthi <st...@hcl.com>]

Hi,
I was trying export/import utility but facing some issues while importing. I have 2 cluster of Hbase with Hadoop say A and B.
Here what I did :

Cluster A:

*         Created table 'list' in Hbase which is stored in /hbase in Hadoop

*         Exported table 'list' at /backup in Hadoop

*         Distcp '/backup' to cluster B at location /backup in Hadoop.

Cluster B : Now I have exported file of my table 'list' in other cluster B which I try to import.

*         Created table schema similar to 'list' with same name 'list' table in cluster B.

*         Tried to import data from  /backup to 'list' table.

Comand is:  "./hadoop org.apache.hadoop.hbase.mapreduce.Import /hbase/list /backup"

Here : /hbase/list is empty table named "list" in Hbase
                     /backup contains exported file from cluster A

Error I am getting is :
11/08/31 11:33:39 WARN client.HConnectionManager$HConnectionImplementation: Encountered problems when prefetch META table:
org.apache.hadoop.hbase.TableNotFoundException: Cannot find row in .META. for table: /hbase/list, row=/hbase/list,,99999999999999
        at org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:136)
        at org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:95)
        at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.prefetchRegionCache(HConnectionManager.java:648)
        at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:702)
        at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:593)
        at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:558)
        at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:172)
        at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:146)
        at org.apache.hadoop.hbase.mapreduce.TableOutputFormat.setConf(TableOutputFormat.java:198)
        at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:62)
        at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
        at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:768)
        at org.apache.hadoop.mapreduce.Job.submit(Job.java:432)
        at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:448)
        at org.apache.hadoop.hbase.mapreduce.Import.main(Import.java:124)
11/08/31 11:33:39 ERROR mapreduce.TableOutputFormat: org.apache.hadoop.hbase.TableNotFoundException: /hbase/list
11/08/31 11:33:39 INFO input.FileInputFormat: Total input paths to process : 1
11/08/31 11:33:40 INFO mapred.JobClient: Running job: job_201108302028_0005
11/08/31 11:33:41 INFO mapred.JobClient:  map 0% reduce 0%
11/08/31 11:33:52 INFO mapred.JobClient: Task Id : attempt_201108302028_0005_m_000000_0, Status : FAILED
java.lang.NullPointerException

Scan .Meta. result :

hbase(main):002:0> scan '.META.'
ROW                                         COLUMN+CELL
list,,1314770593439.e054afd492290f53cc0a80 column=info:regioninfo, timestamp=1314770593490, value=REGION => {NAME => 'list,,1314770593439.e054afd492290f53cc0a8060b5a69
60b5a697bb.                                7bb.', STARTKEY => '', ENDKEY => '', ENCODED => e054afd492290f53cc0a8060b5a697bb, TABLE => {{NAME => 'list', FAMILIES => [{N
                                            AME => 'info', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', COMPRESSION => 'NONE', VERSIONS => '3', TTL => '2147483647',
                                             BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'}]}}
list,,1314770593439.e054afd492290f53cc0a80 column=info:server, timestamp=1314770593537, value=127.0.0.1:52030
60b5a697bb.
list,,1314770593439.e054afd492290f53cc0a80 column=info:serverstartcode, timestamp=1314770593537, value=1314716440847
60b5a697bb.

How to correctly import it  any ideas ?

Stuti

________________________________
::DISCLAIMER::
-----------------------------------------------------------------------------------------------------------------------

The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only.
It shall not attach any liability on the originator or HCL or its affiliates. Any views or opinions presented in
this email are solely those of the author and may not necessarily reflect the opinions of HCL or its affiliates.
Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of
this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have
received this email in error please delete it and notify the sender immediately. Before opening any mail and
attachments please check them for viruses and defect.

-----------------------------------------------------------------------------------------------------------------------