Re: What is the recommended way to get pig 0.8 to talk with CDH3u0 HBase

byambajargal Mon, 25 Apr 2011 03:51:14 -0700

Thank you guys and Bill Graham

I have solved the problem.
I just add the following lines of shell to conf/hadoop-env.sh


# if using HBase, likely want to include HBase config
HBASE_CONF_DIR=${HBASE_CONF_DIR:-/etc/hbase/conf}
if [ -n "$HBASE_CONF_DIR" ] && [ -d "$HBASE_CONF_DIR" ]; then
 export  HADOOP_CLASSPATH=$HBASE_CONF_DIR:$HADOOP_CLASSPATH
fi

it works fine


thanks

Byambajargal



On 4/24/11 23:45, Bill Graham wrote:

I had this issue and had to add the HBase conf dir to HADOOP_CLASSPATH
in conf/hadoop-env.sh on each of the nodes in the cluster so they
could find Zookeeper.


On Sun, Apr 24, 2011 at 1:04 PM, Dmitriy Ryaboy<[email protected]>  wrote:

I suspect the problem here is that you don't have your hbase config
directory on Pig's classpath. You can add it by modifying the PIG_CLASSPATH
environment variable.

D

On Sun, Apr 24, 2011 at 12:41 PM, sulabh choudhury<[email protected]>wrote:

Have you tried loading like :-

*my_data = LOAD 'hbase://test' using
org.apache.pig.backend.hadoop.hbase.HBaseStorage('cf:a', '-caching 100') as
*(a:bytearray)*;dump my_data;*
or
*my_data = LOAD 'hbase://test' using
org.apache.pig.backend.hadoop.hbase.HBaseStorage('cf:a', '-caching 100') as
(a);dump my_data;*

I am just trying to see if it works if you supply a different datatype ,
bytearray instead of chararray, or without any datatype at all.

On Sun, Apr 24, 2011 at 10:40 AM, byambajargal<[email protected]

wrote:
Hello guys

I am running cloudere distribution cdh3u0 on my cluster and i am trying

to

connect pig with Hbase. I have 11 nodes on my cluster so i have

configured

one machine as HBaseMaster and rest are Hbase Region Servers.
On my Master manshine:

    1. Output of the command $*sudo jps is :*

     6907 HMaster
   14108 Jps
   31470 QuorumPeerMain
   22240 JobTracker
   21602 SecondaryNameNode
   21155 NameNode

    2. Output of the command*$status 'detailed'*

  -bash-3.2$ hbase shell
HBase Shell; enter 'help<RETURN>' for list of supported commands.
Type "exit<RETURN>" to leave the HBase Shell
Version 0.90.1-cdh3u0, r, Fri Mar 25 16:10:51 PDT 2011

hbase(main):001:0>  *status 'detailed'*
version 0.90.1-cdh3u0
0 regionsInTransition
10 live servers
    haisen2.ux.uis.no:60020 1303287066114
        requests=0, regions=1, usedHeap=34, maxHeap=987
        -ROOT-,,0
            stores=1, storefiles=1, storefileSizeMB=0, memstoreSizeMB=0,
storefi
         leIndexSizeMB=0
    haisen10.ux.uis.no:60020 1303287733515
        requests=0, regions=1, usedHeap=35, maxHeap=987
        task1,,1303326469811.418e9f137f5b1d33604419ef6a8acb6e.
            stores=1, storefiles=0, storefileSizeMB=0, memstoreSizeMB=0,
storefi
         leIndexSizeMB=0
    haisen4.ux.uis.no:60020 1303287334273
        requests=0, regions=0, usedHeap=33, maxHeap=987
    haisen1.ux.uis.no:60020 1303643944066
        requests=0, regions=0, usedHeap=35, maxHeap=987
    haisen7.ux.uis.no:60020 1303287560071
        requests=0, regions=1, usedHeap=32, maxHeap=987
        test,,1303644907708.63ec7397e09d3335c8471aa90bcc5549.
            stores=1, storefiles=0, storefileSizeMB=0, memstoreSizeMB=0,
storefi
         leIndexSizeMB=0
    haisen9.ux.uis.no:60020 1303287672340
        requests=0, regions=1, usedHeap=24, maxHeap=987
        .META.,,1
            stores=1, storefiles=1, storefileSizeMB=0, memstoreSizeMB=0,
storefi
         leIndexSizeMB=0
    haisen5.ux.uis.no:60020 1303287407405
        requests=0, regions=0, usedHeap=28, maxHeap=987
    haisen6.ux.uis.no:60020 1303287480842
        requests=0, regions=0, usedHeap=23, maxHeap=987
    haisen3.ux.uis.no:60020 1303287189985
        requests=0, regions=0, usedHeap=27, maxHeap=987
    haisen8.ux.uis.no:60020 1303287626373
        requests=0, regions=0, usedHeap=30, maxHeap=987
0 dead servers


I can put data into HBase and pull it out just fine by hbase shell

command

and i have a problem when i load data from hbase by using the following

Pig

query:

*my_data = LOAD 'hbase://test' using
org.apache.pig.backend.hadoop.hbase.HBaseStorage('cf:a', '-caching 100')

as

(a:chararray);dump my_data;*

i got a error message and my job was failure. If someone could help me to
connect hbase with pig that would be great.


the problem I am having now is the following exception on the pig log

file:

Backend error message
---------------------
org.apache.hadoop.hbase.ZooKeeperConnectionException:
org.apache.hadoop.hbase.ZooKeeperConnectionException:
org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase
        at

org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getZooKeeperWatcher(HConnectionManager.java:991)

at

org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.setupZookeeperTrackers(HConnectionManager.java:302)

at

org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.<init>(HConnectionManager.java:293)

at

org.apache.hadoop.hbase.client.HConnectionManager.getConnection(HConnectionManager.java:156)

        at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:167)
        at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:145)
        at

org.apache.pig.backend.hadoop.hbase.HBaseStorage.setLocation(HBaseStorage.java:302)

at

org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.mergeSplitSpecificConf(PigInputFormat.java:133)

at

org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.createRecordReader(PigInputFormat.java:111)

        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:613)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:322)
        at org.apache.hadoop.mapred.Child$4.run(Child.java:268)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at

org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115)

        at org.apache.hadoop.mapred.Child.main(Child.java:262)
Caused by: org.apache.hadoop.hbase.ZooKeeperConnectionException:
org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase
        at

org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:147)

at

org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getZooKeeperWatcher(HConnectionManager.java:989)

        ... 15 more
Caused by: org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase
        at
org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
        at
org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
        at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:637)
        at

org.apache.hadoop.hbase.zookeeper.ZKUtil.createAndFailSilent(ZKUtil.java:902)

at

org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:133)

        ... 16 more

Pig Stack Trace
---------------
ERROR 2997: Unable to recreate exception from backed error:
org.apache.hadoop.hbase.ZooKeeperConnectionException:
org.apache.hadoop.hbase.ZooKeeperConnectionException:
org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase

org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to
open iterator for alias my_data. Backend error : Unable to recreate
exception from backed error:
org.apache.hadoop.hbase.ZooKeeperConnectionException:
org.apache.hadoop.hbase.ZooKeeperConnectionException:
org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase
        at org.apache.pig.PigServer.openIterator(PigServer.java:742)
        at
org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:612)
        at

org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:303)

at

org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:165)




Thanks for helping


Byambajargal


--

--
Thanks and Regards,
Sulabh Choudhury

Re: What is the recommended way to get pig 0.8 to talk with CDH3u0 HBase

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