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https://issues.apache.org/jira/browse/CURATOR-462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16432245#comment-16432245
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Jordan Zimmerman commented on CURATOR-462:
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Version 2.x is EOL. FYI

> InterProcessSemaphoreV2 leaves orphaned lease node if acquiring the semaphore 
> is interrupted at the wrong time
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: CURATOR-462
>                 URL: https://issues.apache.org/jira/browse/CURATOR-462
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: Recipes
>    Affects Versions: 2.11.0, 3.2.0, 3.2.1, 2.11.1, 3.3.0, 2.12.0, 4.0.0, 4.0.1
>            Reporter: Gergely Krajcsovszki
>            Priority: Major
>
> Since CURATOR-315, lease nodes created in 
> org.apache.curator.framework.recipes.locks.InterProcessSemaphoreV2.internalAcquire1Lease(Builder<Lease>,
>  long, boolean, long) are not returned if the wait for them to become active 
> is interrupted. This is because the lease node is now only added to the 
> builder at the end of the method, so the caller doesn't know about this node 
> and cannot close it when catching an exception.
> We have already fixed this locally in our own dependent library so I'll make 
> a PR with our fix and a test soon. We are still on the 2.x branch so we'd 
> like if this fix could be in 2.13.0.



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