[Rdo-list] How to set up EDP Pig jobs on Sahara Vanialla 2.7.1 Cluster (RDO Liberty ) ?

Fri Feb 12 20:14:23 UTC 2016

Hi Boris,

One possible source of error in your script is that (at least in your paste here) your $OUTPUT variable seems to be misspelled ('$OUPUT').

If that's not the issue (and it might well not be, if that was only a typo in this mail,) then I fear that debugging Pig jobs is one of the roughest spots of Sahara at present. It looks, though, as though your job is being processed by grunt (the Pig interpreter, as all things must be cute and pig-related), and that the interpreter is failing to parse the job file, so the misspelling diagnosis does fit (if you're telling it to output to a nonexistent variable, that fits; the rest of your script looks syntactically correct to me and to my Lipstick equivalent.)

Could you check to see if this is a problem? If not, I can try to help you do a deeper dive.

Cheers,
Ethan

----- Original Message -----
From: "Boris Derzhavets" <bderzhavets at hotmail.com>
To: "Luigi Toscano" <ltoscano at redhat.com>, rdo-list at redhat.com
Cc: egafford at redhat.com
Sent: Friday, February 12, 2016 12:29:59 PM
Subject: Re: [Rdo-list] How to set up EDP Pig jobs on Sahara Vanialla 2.7.1 Cluster (RDO Liberty ) ?

________________________________________
From: rdo-list-bounces at redhat.com <rdo-list-bounces at redhat.com> on behalf of Boris Derzhavets <bderzhavets at hotmail.com>
Sent: Friday, February 12, 2016 11:27 AM
To: Luigi Toscano; rdo-list at redhat.com
Cc: egafford at redhat.com
Subject: Re: [Rdo-list] How to set up EDP Pig jobs on Sahara Vanialla 2.7.1 Cluster (RDO Liberty ) ?

________________________________________
From: rdo-list-bounces at redhat.com <rdo-list-bounces at redhat.com> on behalf of Boris Derzhavets <bderzhavets at hotmail.com>
Sent: Friday, February 12, 2016 10:50 AM
To: Luigi Toscano; rdo-list at redhat.com
Cc: egafford at redhat.com
Subject: Re: [Rdo-list] How to set up EDP Pig jobs on Sahara Vanialla 2.7.1 Cluster (RDO Liberty ) ?

________________________________________
From: Luigi Toscano <ltoscano at redhat.com>
Sent: Friday, February 12, 2016 8:58 AM
To: rdo-list at redhat.com
Cc: Boris Derzhavets; egafford at redhat.com
Subject: Re: [Rdo-list] How to set up EDP Pig jobs on Sahara Vanialla 2.7.1 Cluster (RDO Liberty ) ?

On Thursday 11 of February 2016 20:37:33 Boris Derzhavets wrote:
> After several failures in Sahara UI environment, I just attempted to set up
> Pig on Mater Node (VM) following
> https://pig.apache.org/docs/r0.13.0/start.html#build ( current release
> 0.15)
>
> Downloaded  Pig on Master VM and configured it, so that I could run
> simple pig script like (filtering "ERROR" line from sahara-engine.log)  :-

You should not install Pig from apache.org, but it's already bundled on the
image.

 [BD]
  We may check :-
  1. I will drop all VMs in Cluster
  2. I will recreate new Vanilla 2.7.1 cluster
  3 .Log into master and worker VMs and run :-
     ubuntu$ sudo su - hadoop
     hadoop$ which pig

 If the last command wouldn't  return me anything would  it be  a fair ?
 Is it  correct way for verification ?

[BD]
Yes , I see presence of bundled pig on Master

./opt/hive/hcatalog/share/webhcat/svr/lib/pig-0.10.1.jar
./opt/hive/hcatalog/share/hcatalog/hcatalog-pig-adapter-0.11.0.jar
./opt/oozie/lib/oozie-sharelib-pig-4.2.0.jar
./opt/oozie/oozie-server/webapps/oozie/WEB-INF/lib/oozie-sharelib-pig-4.2.0.jar

[BD]
Cluster based on  Vanilla 271 plugin recreated . 

hadoop at demo-cluster271-hadoop-master-node-0:~$ jps
4020 Bootstrap
2540 ResourceManager
4452 Jps
2285 NameNode
4242 RunJar
2977 JobHistoryServer
2392 SecondaryNameNode

ubuntu at demo-cluster271-hadoop-work-node-1:~$ sudo su - hadoop
hadoop at demo-cluster271-hadoop-work-node-1:~$ jps
2250 NodeManager
2193 DataNode
4159 Jps

hadoop-master-node  -Template 1
    vanilla  2.7.1 	

    namenode
    secondarynamenode
    resourcemanager
    historyserver
    oozie
    hiveserver

hadoop-work-node  -Template 2
    vanilla 2.7.1 	

    datanode
    nodemanager

Cluster Template ( XFS && SWIFT support enabled)

  demo-template271
    vanilla 	2.7.1 	
    hadoop-work-node: 3
    hadoop-master-node: 1

Attempt to run same job-binary ( prg1.pig )
same input and output.

Generated logs on work-node-1
http://bderzhavets.blogspot.com/2016/02/snaphots-on-mastenode-workernode-1.html
http://textuploader.com/52dzu

> [...]
>
> Either I have wrong understanding how set up Pig on Hadoop Cluster or doing
> mistakes in Sahara GUI environment. One more thing confusing me Pig should
> be installed during Sahara's Hadoop Cluster generating, it is not a part of
> of Hadoop Cluster ( no matter which plugin has been used ), how Sahara
> suggests to set up Pig Jobs if there is no any Pig on cluster's VMs. I am
> missing something here.

It should be. Is there anything that let you think that Pig is not included?
Did you add oozie to the cluster templates?

[BD]

Yes . I did it on  Master's Template (Vanilla 2.7.1). Only datanode and nodemanager
were removed from Master template and added to Worker Template.

Master template :-
  Everything except
- datanode
- nodemanager

Worker template:-
    Only
 + datanode
 + nodemanager

Clusters Template = 1*Master+3*Workers

I started without any Pig setup on Master and each time job finally got killed
and I could watch Java exception as above on one of Worker Nodes attempting
to run  prg1.pig as job-binary :-

messages = LOAD '$INPUT';
out = FILTER messages BY $0 MATCHES '^+.*ERROR+.*';
STORE out  INTO '$OUPUT' USING PigStorage() ;

with
1) input defined as swift ://demo.sahara/input.txt ( previously uploaded to public swift
                                                                                       container "demo" )
 2) output defined as swift://demo/sahara/output

Just following up Mirantis's Video for Juno :-
https://www.mirantis.com/blog/sahara-updates-in-openstack-juno-release/

I installed Pig on Master , to make sure that in Hadoop environment I am able to
succeed with
hadoop$ pig -x mapreduce prg1.pig ( i.e. running pig script within  Hadoop Cluster, by hadoop user )

There is one strange thing , when I suspend all VMs in Cluster and then resume all VMs in Cluster (4)
It requires 10-15 min to be able manually run :-
hadooop$  pig -x mapreduce prg1.pig
Like some Java services are awakened very slow , even Master VM is resumed and available for
logging into.

Thank you.
Boris

Regards
--
Luigi

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