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https://issues.apache.org/jira/browse/HBASE-14279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14723055#comment-14723055
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Heng Chen commented on HBASE-14279:
-----------------------------------
{quote}
There is a similar class, KeyLoccker, whose key type is a generic one, and you
can use it without copying its implementation logic. The implementation of
IdLocker and KeyLocker is not good and should be re-written, and I believe it
is better to avoid to copy their implementation.
{quote}
yeah, you are right. {{KeyLocker}} is a better choice.
> Race condition in ConcurrentIndex
> ---------------------------------
>
> Key: HBASE-14279
> URL: https://issues.apache.org/jira/browse/HBASE-14279
> Project: HBase
> Issue Type: Bug
> Reporter: Hiroshi Ikeda
> Assignee: Heng Chen
> Priority: Minor
> Attachments: HBASE-14279.patch, HBASE-14279_v2.patch
>
>
> {{ConcurrentIndex.put}} and {{remove}} are in race condition. It is possible
> to remove a non-empty set, and to add a value to a removed set. Also
> {{ConcurrentIndex.values}} is vague in sense that the returned set sometimes
> trace the current state and sometimes doesn't.
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