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Posted to commits@cassandra.apache.org by "Janne Jalkanen (Commented) (JIRA)" <ji...@apache.org> on 2012/02/26 21:56:52 UTC
[jira] [Commented] (CASSANDRA-3962) CassandraStorage can't cast
fields from a CF correctly
[ https://issues.apache.org/jira/browse/CASSANDRA-3962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13216834#comment-13216834 ]
Janne Jalkanen commented on CASSANDRA-3962:
-------------------------------------------
Relevant IRC log from #cassandra
{code}
[22:26] driftx: hmm, I think this is the udfcontext signature reuse problem
[22:26] driftx: jeromatron: what's the workaround for that again?
[22:26] Ecyrd: Is there an open bug?
[22:28] driftx: #2869, but we fixed it. hmm.
[22:28] CassBotJr: https://issues.apache.org/jira/browse/CASSANDRA-2869 : CassandraStorage does not function properly when used multiple times in a single pig script due to UDFContext sharing issues
[22:34] driftx: case DataType.CHARARRAY:
[22:34] driftx: return new NullableText((String)o);
[22:34] driftx: so it thinks it has a chararray, but it still has a bytearray
[22:42] driftx: I think we have to implement a LoadCaster to get around this
[22:43] Ecyrd: So I'm not insane, this is a real bug
{code}
> CassandraStorage can't cast fields from a CF correctly
> ------------------------------------------------------
>
> Key: CASSANDRA-3962
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3962
> Project: Cassandra
> Issue Type: Bug
> Components: Hadoop
> Affects Versions: 1.0.8
> Environment: OSX 10.6.latest, Pig 0.9.2.
> Reporter: Janne Jalkanen
> Attachments: test.cli, test.pig
>
>
> Included scripts demonstrate the problem. Regardless of whether the key is cast as a chararray or not, the Pig scripts fail with
> {code}
> java.lang.ClassCastException: org.apache.pig.data.DataByteArray cannot be cast to java.lang.String
> at org.apache.pig.backend.hadoop.HDataType.getWritableComparableTypes(HDataType.java:72)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Map.collect(PigGenericMapReduce.java:117)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:269)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:262)
> at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:64)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
> at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212)
> {code}
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