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https://issues.apache.org/jira/browse/PIG-3836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13948640#comment-13948640
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Cheolsoo Park commented on PIG-3836:
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+1. I'll commit it tomorrow.
Thank you Akihiro!
> Pig signature has has guava version dependency
> ----------------------------------------------
>
> Key: PIG-3836
> URL: https://issues.apache.org/jira/browse/PIG-3836
> Project: Pig
> Issue Type: Bug
> Reporter: Akihiro Matsukawa
> Assignee: Akihiro Matsukawa
> Attachments: 0001-use-murmur-hash-with-0-seed.patch
>
>
> We currently use Hashing.goodFastHash(32) to generate signatures for the
> logical plan. Under the hood, this is a murmur32 hash.
> Guava 11, which pig directly depends on, always seeds the hash with 0.
> http://docs.guava-libraries.googlecode.com/git-history/v11.0/javadoc/src-html/com/google/common/hash/Hashing.html#line.85
> In future versions of Guava, it is seeded by current time:
> http://docs.guava-libraries.googlecode.com/git-history/v14.0/javadoc/src-html/com/google/common/hash/Hashing.html#line.47
> So when future versions of guava is pulled into the classpath (which if
> often), we no longer get the same signature for the same logical plan between
> each executions of pig. This introduces unnecessary complexity for managing
> the classpath.
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