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https://issues.apache.org/jira/browse/JENA-2151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17402805#comment-17402805
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Andy Seaborne commented on JENA-2151:
-------------------------------------
The change needed is:
https://github.com/afs/jena/commit/c1c9d48a4f06c206f94bc4d76d03c07806dba2d1#diff-08bf6edda9b6efc05589c06a8cf5c93e9bfff424ef796ece42191746919db5daR61
Please try it out in preparation for the next release.
> Iter.filter does not close nested iterator
> ------------------------------------------
>
> Key: JENA-2151
> URL: https://issues.apache.org/jira/browse/JENA-2151
> Project: Apache Jena
> Issue Type: Bug
> Affects Versions: Jena 4.1.0
> Reporter: Holger Knublauch
> Priority: Major
> Attachments: IteratorFilter.java
>
>
> We recently attempted to upgrade our product to Jena 4.1.0 but noticed
> unclosed iterator warnings. I believe I have tracked it down to the fact that
> Iter.filter does not return a Closeable iterator and therefore does not close
> its nested (stream) iterator. I am attaching an implementation class that
> seems to fix it. With this, org.apache.jena.atlas.iterator.Iter.filter simply
> need to become
> {code:java}
> public static <T> Iterator<T> filter(final Iterator<? extends T> stream,
> final Predicate<T> filter) {
> return new IteratorFilter<T>(stream, filter);
> }
> {code}
> (Although Iter.filter hasn't changed for a while, I suspect some other
> changes to Jena caused the SPARQL engine to use it, and this has broken some
> scenarios for us - in particular calling SPIN/SHACL-SPARQL functions with
> BGPs in the WHERE clause).
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