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https://issues.apache.org/jira/browse/GEARPUMP-286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15886966#comment-15886966
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ASF GitHub Bot commented on GEARPUMP-286:
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GitHub user manuzhang opened a pull request:
https://github.com/apache/incubator-gearpump/pull/164
[GEARPUMP-286] Fix window and group implementation in DefaultWindowRu…
…nner
Be sure to do all of the following to help us incorporate your contribution
quickly and easily:
- [ ] Make sure the commit message is formatted like:
`[GEARPUMP-<Jira issue #>] Meaningful description of pull request`
- [ ] Make sure tests pass via `sbt clean test`.
- [ ] Make sure old documentation affected by the pull request has been
updated and new documentation added for new functionality.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/manuzhang/incubator-gearpump GEARPUMP-286
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-gearpump/pull/164.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #164
----
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> Different WindowAndGroups could end up in one due to hashCode collision
> ------------------------------------------------------------------------
>
> Key: GEARPUMP-286
> URL: https://issues.apache.org/jira/browse/GEARPUMP-286
> Project: Apache Gearpump
> Issue Type: Bug
> Components: streaming
> Affects Versions: 0.8.2
> Reporter: Manu Zhang
> Assignee: Manu Zhang
>
> Currently, we use a {{TreeMap}} to store and sort {{WindowAndGroup}}, which
> requires {{WindowAndGroup}} to be {{Comparable}}. However, {{Group}} is not
> and not supposed to be so I hacked with its {{hashCode}} for comparison. That
> is wrong since two {{Group}} could have identical {{hashCode}}.
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