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https://issues.apache.org/jira/browse/LUCENE-5604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13990011#comment-13990011
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David Smiley commented on LUCENE-5604:
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The system property "tests.seed" is being set to the empty string "" in my test
setup, and it would be annoying to have it not do this. If one looks at the
Maven pom.xml we generate, it's written to pass along certain system properties
which get defaulted essentially to "", unless set on the command-line. Can we
have the static initializer in StringHelper guard against the empty string case
so that it doesn't hit an exception? I'd be happy to commit the trivial change
(and to 4.8.1)
> Should we switch BytesRefHash to MurmurHash3?
> ---------------------------------------------
>
> Key: LUCENE-5604
> URL: https://issues.apache.org/jira/browse/LUCENE-5604
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/index
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 4.8, 5.0
>
> Attachments: BytesRefHash.perturb.patch, LUCENE-5604.patch,
> LUCENE-5604.patch, LUCENE-5604.patch
>
>
> MurmurHash3 has better hashing distribution than the current hash function we
> use for BytesRefHash which is a simple multiplicative function with 31
> multiplier (same as Java's String.hashCode, but applied to bytes not chars).
> Maybe we should switch ...
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