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https://issues.apache.org/jira/browse/SOLR-12355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16481209#comment-16481209
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ASF subversion and git services commented on SOLR-12355:
--------------------------------------------------------
Commit 1e661ed97aed0cc77869b01134d80c761c6b5295 in lucene-solr's branch
refs/heads/branch_7x from [~dpgove]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=1e661ed ]
SOLR-12355: Fixes hash conflict in HashJoinStream and OuterHashJoinStream
> HashJoinStream's use of String::hashCode results in non-matching tuples being
> considered matches
> ------------------------------------------------------------------------------------------------
>
> Key: SOLR-12355
> URL: https://issues.apache.org/jira/browse/SOLR-12355
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrJ
> Affects Versions: 6.0
> Reporter: Dennis Gove
> Assignee: Dennis Gove
> Priority: Major
> Fix For: 7.4
>
> Attachments: SOLR-12355.patch, SOLR-12355.patch
>
>
> The following strings have been found to have hashCode conflicts and as such
> can result in HashJoinStream considering two tuples with fields of these
> values to be considered the same.
> {code:java}
> "MG!!00TNGP::Mtge::".hashCode() == "MG!!00TNH1::Mtge::".hashCode() {code}
> This means these two tuples are the same if we're comparing on field "foo"
> {code:java}
> {
> "foo":"MG!!00TNGP::Mtge::"
> }
> {
> "foo":"MG!!00TNH1::Mtge::"
> }
> {code}
> and these two tuples are the same if we're comparing on fields "foo,bar"
> {code:java}
> {
> "foo":"MG!!00TNGP"
> "bar":"Mtge"
> }
> {
> "foo":"MG!!00TNH1"
> "bar":"Mtge"
> }{code}
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