shankarlingayya created HBASE-9636:
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Summary: 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
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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>
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