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https://issues.apache.org/jira/browse/PIG-4806?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rohini Palaniswamy updated PIG-4806:
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Status: Patch Available (was: Open)
> UDFContext can be overwritten with empty properties in the task for inputs
> and outputs during initialization
> ------------------------------------------------------------------------------------------------------------
>
> Key: PIG-4806
> URL: https://issues.apache.org/jira/browse/PIG-4806
> Project: Pig
> Issue Type: Bug
> Reporter: Rohini Palaniswamy
> Assignee: Rohini Palaniswamy
> Fix For: 0.16.0
>
> Attachments: PIG-4806-1.patch
>
>
> We reinitialize UDFContext ThreadLocal itself in PigProcessor.initialize().
> PigProcessor.initialize() is run in parallel with threads that do
> MRInput.initialize() and MROutput.initialize(). It can overwrite the
> initialized values in the input and output half way through. This can lead to
> exceptions if the property stored in UDFContext is mandatory and task will be
> retried which is ok. If it is not mandatory and it ends up getting null when
> it actually had a value, wrong data can be produced silently.
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