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From "rajeshbabu (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HBASE-9636) HBase shell/client 'scan table' operation is getting failed inbetween the when the regions are shifted from one Region Server to another Region Server
Date Mon, 23 Sep 2013 15:38:05 GMT

     [ https://issues.apache.org/jira/browse/HBASE-9636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

rajeshbabu reassigned HBASE-9636:
---------------------------------

    Assignee: rajeshbabu
    
>  HBase shell/client 'scan table' operation is getting failed inbetween the when the regions
are shifted from one Region Server to another Region Server 
> --------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-9636
>                 URL: https://issues.apache.org/jira/browse/HBASE-9636
>             Project: HBase
>          Issue Type: Bug
>          Components: master, regionserver
>    Affects Versions: 0.94.11
>         Environment: SuSE11
>            Reporter: shankarlingayya
>            Assignee: rajeshbabu
>
> {noformat}
> Problem:
> HBase shell/client 'scan table' operation is getting failed inbetween the when the regions
are shifted from one Region Server to another Region Server
> When the table regions data moved from one Region Server to another Region Server then
the client/shell should be able to handle the data from the 
> new Region server automatically (because when we have huge data in terms of GB/TB at
that time one of the Region Server going down in the cluster is frequent)
> Procedure:
> 1. Setup Non HA Hadoop Cluster with two nodes (Node1-XX.XX.XX.XX,  Node2-YY.YY.YY.YY)
> 2. Install Zookeeper, HMaster & HRegionServer in Node-1
> 3. Install HRegionServer in Node-2
> 4. From Node2 create HBase Table ( table name 't1' with one column family 'cf1' )
> 5. add around 367120 rows to the table
> 6. scan the table 't1' using hbase shell & at the same time switch the region server
1 & 2 (so that the table 't1' regions data are moved from Region Server 1 to 1 & vice
versa)
> 7. During this time hbase shell is getting failed in between of the scan operation as
below
> ...................................................................                 
              
>  row172266                        column=cf1:a, timestamp=1379680737307, value=100  
                                           
>  row172267                        column=cf1:a, timestamp=1379680737311, value=100  
                                           
>  row172268                        column=cf1:a, timestamp=1379680737314, value=100  
                                           
>  row172269                        column=cf1:a, timestamp=1379680737317, value=100  
                                           
>  row17227                         column=cf1:a, timestamp=1379679668631, value=100  
                                           
>  row17227                         column=cf1:b, timestamp=1379681090560, value=200  
                                          
> ERROR: java.lang.RuntimeException: org.apache.hadoop.hbase.client.RetriesExhaustedException:
Failed after attempts=7, exceptions:
> Fri Sep 20 18:20:58 IST 2013, org.apache.hadoop.hbase.client.ScannerCallable@1999dc4f,
java.net.ConnectException: Connection refused
> Fri Sep 20 18:20:59 IST 2013, org.apache.hadoop.hbase.client.ScannerCallable@1999dc4f,
org.apache.hadoop.hbase.ipc.HBaseClient$FailedServerException: This server is in the failed
servers list: HOST-YY.YY.YY.YY/YY.YY.YY.YY:61020
> Fri Sep 20 18:21:00 IST 2013, org.apache.hadoop.hbase.client.ScannerCallable@1999dc4f,
java.net.ConnectException: Connection refused
> Fri Sep 20 18:21:01 IST 2013, org.apache.hadoop.hbase.client.ScannerCallable@1999dc4f,
org.apache.hadoop.hbase.ipc.HBaseClient$FailedServerException: This server is in the failed
servers list: HOST-YY.YY.YY.YY/YY.YY.YY.YY:61020
> Fri Sep 20 18:21:07 IST 2013, org.apache.hadoop.hbase.client.ScannerCallable@1999dc4f,
java.net.ConnectException: Connection refused
> Fri Sep 20 18:21:09 IST 2013, org.apache.hadoop.hbase.client.ScannerCallable@1999dc4f,
java.net.ConnectException: Connection refused
> Fri Sep 20 18:21:17 IST 2013, org.apache.hadoop.hbase.client.ScannerCallable@1999dc4f,
java.net.ConnectException: Connection refused
> hbase(main):014:0> 
> {noformat}

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