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https://issues.apache.org/jira/browse/PIG-1337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851105#action_12851105
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Chao Wang commented on PIG-1337:
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This may also relate to https://issues.apache.org/jira/browse/MAPREDUCE-1620
"Hadoop should serialize the Configration after the call to getSplits() to the
backend such that any changes to the Configuration in getSplits() is serialized
to the backend"
But a cleaner solution from Pig's side is still worthwhile - so we can just
rely on Pig's front end only calls, like getSchema() to do the setup job.
> Need a way to pass distributed cache configuration information to hadoop
> backend in Pig's LoadFunc
> --------------------------------------------------------------------------------------------------
>
> Key: PIG-1337
> URL: https://issues.apache.org/jira/browse/PIG-1337
> Project: Pig
> Issue Type: Improvement
> Affects Versions: 0.6.0
> Reporter: Chao Wang
> Fix For: 0.8.0
>
>
> The Zebra storage layer needs to use distributed cache to reduce name node
> load during job runs.
> To to this, Zebra needs to set up distributed cache related configuration
> information in TableLoader (which extends Pig's LoadFunc) .
> It is doing this within getSchema(conf). The problem is that the conf object
> here is not the one that is being serialized to map/reduce backend. As such,
> the distributed cache is not set up properly.
> To work over this problem, we need Pig in its LoadFunc to ensure a way that
> we can use to set up distributed cache information in a conf object, and this
> conf object is the one used by map/reduce backend.
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