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https://issues.apache.org/jira/browse/CURATOR-388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16299054#comment-16299054
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ASF GitHub Bot commented on CURATOR-388:
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GitHub user Randgalt opened a pull request:
https://github.com/apache/curator/pull/249
[CURATOR-388] PathChildrenCache stops working if container node is
auto-removed
PathChildrenCache stops working if container node is auto-removed and later
recreated - test and a fix
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/apache/curator CURATOR-388
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/curator/pull/249.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 #249
----
commit 21b0877842d12c61f5c8c7f886d596809e12a628
Author: randgalt <randgalt@...>
Date: 2017-12-20T20:39:37Z
PathChildrenCache stops working if container node is auto-removed and later
recreated - test and a fix
----
> PathChildrenCache stops working if container node is auto-removed and later
> recreated
> -------------------------------------------------------------------------------------
>
> Key: CURATOR-388
> URL: https://issues.apache.org/jira/browse/CURATOR-388
> Project: Apache Curator
> Issue Type: Bug
> Components: Recipes
> Affects Versions: 3.2.1
> Environment: zookeeper 3.5.2-alpha
> Reporter: Rhys Yarranton
> Assignee: Jordan Zimmerman
> Fix For: 4.0.1
>
> Attachments: EmptyPathChildrenCacheTest.java
>
>
> PathChildrenCache uses EnsureContainers to create the path as a container(if
> it does not already exist). If at some point that container is empty,
> ZooKeeper may remove it. If at some later point the path is recreated and a
> child node added, the PathChildrenCache will not detect it. No event will be
> fired, nor will the child node appear in getCurrentData().
> The attached test reproduces the problem most of the time if the ZooKeeper
> server has znode.container.checkIntervalMs reduced to 1000.
> A workaround is to explicitly create the path as a non-container before
> starting the PathChildrenCache.
> NB there are two related problems here. One is that it has trouble handling
> containers. More serious is that it creates a container, thus running itself
> into trouble.
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