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From "Brandon Williams (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-3745) contrib/PIG example fails when column metadata exists for CF
Date Tue, 17 Jan 2012 16:31:40 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-3745?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Brandon Williams resolved CASSANDRA-3745.
-----------------------------------------

    Resolution: Duplicate

Ultimately the same issue as CASSANDRA-3371.  Despite the unclear error message, the problem
is actually the validators -- duplicate names of "value"
                
> contrib/PIG example fails when column metadata exists for CF
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-3745
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3745
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Contrib
>    Affects Versions: 1.0.6
>            Reporter: Sasha Dolgy
>              Labels: cassandra, pig
>
> I have a sandbox CF for prototyping and it has 17 Secondary Indexes defined.  When I
would run the contrib/PIG example, using pig 0.8.1 and even the pig 0.8.3 jar, with Cassandra
1.0.6, I would receive the following error from the second line of the example script [ cols
= FOREACH rows GENERATE flatten(columns); ]:
> 2012-01-14 06:54:27,551 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1007: Found
duplicates in schema. : 18 columns. Please alias the columns with unique names.
> I proceeded to drop all of the indexes, and tried again.  Same error.  On further inspection,
show schema showed that the metadata still existed on the CF from the indexes.  I ran the
following: 
> update column family user with column_metadata = [];
> I can now run the full contrib/pig example against my CF.  
> *If I select another CF with 2 secondary indexes, the same behaviour persists:
> 2012-01-14 08:34:31,413 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1007: Found
duplicates in schema. : 3 columns. Please alias the columns with unique names.
> grunt> describe users;
> 2012-01-14 08:36:58,227 [main] INFO  org.apache.hadoop.metrics.jvm.JvmMetrics - Cannot
initialize JVM Metrics with processName=JobTracker, sessionId= - already initialized
> users: {key: bytearray,columns: {T: (name: chararray,value: bytearray,column_family:
chararray,value: bytearray,owner_id: chararray,value: bytearray)}}
> grunt>
> grunt> dump users;
> <-- removed INFO/WARN output -->
> HadoopVersion   PigVersion      UserId  StartedAt       FinishedAt      Features
> 0.20.2  0.8.1   sasha   2012-01-14 08:37:24     2012-01-14 08:37:43     UNKNOWN
> Success!
> Job Stats (time in seconds):
> JobId   Alias   Feature Outputs
> job_local_0001  users   MAP_ONLY        file:/tmp/temp-1366421017/tmp-1001688304,
> Input(s):
> Successfully read records from: "cassandra://sdo/entity_relations"
> Output(s):
> Successfully stored records in: "file:/tmp/temp-1366421017/tmp-1001688304"
> Job DAG:
> job_local_0001
> (d1540edc-cb16-47dd-96e3-90e1657c2d77:a721966c6026ee85ef35f2108b75d3784b52bf1217f0b62564bdefe67b9504d9,{(content_id,d1540edc-cb16-47dd-96e3-90e1657c2d77:a721966c6026ee85ef35f2108b75d3784b52bf1217f0b62564bdefe67b9504d9),(owner_id,d1540edc-cb16-47dd-96e3-90e1657c2d77)})
> grunt>
> I have also tried this with PIG 0.9.1 but encounter https://issues.apache.org/jira/browse/CASSANDRA-3371


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