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https://issues.apache.org/jira/browse/TINKERPOP-2224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16860256#comment-16860256
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ASF GitHub Bot commented on TINKERPOP-2224:
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spmallette commented on pull request #1118: TINKERPOP-2224 Detect and fix
iterator leaks
URL: https://github.com/apache/tinkerpop/pull/1118
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> Detect and fix resource leak
> ----------------------------
>
> Key: TINKERPOP-2224
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2224
> Project: TinkerPop
> Issue Type: Bug
> Components: process
> Affects Versions: 3.3.7, 3.4.2
> Reporter: Divij Vaidya
> Priority: Major
>
> During the execution of the query the underlying provider layer might open
> some resources such as cursors or iterators which should be closed on
> completion of execution of the query. This is largely done by calling
> Traversal.close() method at the end of the traversal.
> However, there are bugs in the query processor which lead to a leak of these
> resources. As an example, consider the following query:
> g.V().not(__.V().out()).fold().unfold()
> The implementation of not() step creates a child traversal which would open
> an iterator(aka resource) at the storage layer but due to a bug in
> TraversalUtil.java, it will never close this traversal (even on calling
> Traversal.close() on the global Traversal). This leads to open resources on
> the storage layer.
> The purpose of this task is to add a framework for detecting an iterator leak
> and consequently fixing the bugs unearthed by the new framework.
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