Akihiro Matsukawa created PIG-3836:
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Summary: 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
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. This introduces
unnecessary complexity for managing the classpath.
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