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https://issues.apache.org/jira/browse/PIG-3222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13619340#comment-13619340
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Daniel Dai commented on PIG-3222:
---------------------------------

I tried the script, it connected to metastore 3 times: setStoreLocation, 
checkOutputSpecs and commitJob. HCatStorer needs to cache the results in 
UDFContext. 

However, it doesn't seems to be a regression. I see the same behavior in 
0.9/0.10. 
                
> New UDFContextSignature assignments in Pig 0.11 breaks HCatalog.HCatStorer 
> ---------------------------------------------------------------------------
>
>                 Key: PIG-3222
>                 URL: https://issues.apache.org/jira/browse/PIG-3222
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.11
>            Reporter: Feng Peng
>              Labels: hcatalog
>         Attachments: PigStorerDemo.java
>
>
> Pig 0.11 assigns different UDFContextSignature for different invocations of 
> the same load/store statement. This change breaks the HCatStorer which 
> assumes all front-end and back-end invocations of the same store statement 
> has the same UDFContextSignature so that it can read the previously stored 
> information correctly.
> The related HCatalog code is in 
> https://svn.apache.org/repos/asf/incubator/hcatalog/branches/branch-0.5/hcatalog-pig-adapter/src/main/java/org/apache/hcatalog/pig/HCatStorer.java
>  (the setStoreLocation() function).

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