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From "Jeremy Hanna (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-2869) CassandraStorage does not function properly when used multiple times in a single pig script due to UDFContext sharing issues
Date Wed, 13 Jul 2011 14:31:00 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-2869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jeremy Hanna updated CASSANDRA-2869:
------------------------------------

    Attachment: 2869-2.txt

Removed that String.  Also removed adding mutation twice and put in the nested exception in
putNext into the IOException.  We've been meaning to add those last two items to one of these
tickets.

> CassandraStorage does not function properly when used multiple times in a single pig
script due to UDFContext sharing issues
> ----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-2869
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2869
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Contrib
>    Affects Versions: 0.7.2
>            Reporter: Grant Ingersoll
>            Assignee: Jeremy Hanna
>         Attachments: 2869-2.txt, 2869.txt
>
>
> CassandraStorage appears to have threading issues along the lines of those described
at http://pig.markmail.org/message/oz7oz2x2dwp66eoz due to the sharing of the UDFContext.
> I believe the fix lies in implementing
> {code}
> public void setStoreFuncUDFContextSignature(String signature)
>     {
>     }
> {code}
> and then using that signature when getting the UDFContext.
> From the Pig manual:
> {quote}
> setStoreFunc!UDFContextSignature(): This method will be called by Pig both in the front
end and back end to pass a unique signature to the Storer. The signature can be used to store
into the UDFContext any information which the Storer needs to store between various method
invocations in the front end and back end. The default implementation in StoreFunc has an
empty body. This method will be called before other methods.
> {quote}

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