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https://issues.apache.org/jira/browse/OAK-8898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17056052#comment-17056052
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Thomas Mueller commented on OAK-8898:
-------------------------------------
[~mkataria] I created a branch here:
[https://github.com/oak-indexing/jackrabbit-oak/tree/OAK-8898]
This allows to reproduce the issue (it is based on your test case).
I also found the root cause, and a possible solution (see
LucenePropertyIndex.OLD_FACET_PROVIDER). The problem seems to be that the
reader is used after it is closed, by leaking the reference to the searcher to
the LuceneFacetProvider in loadDocs(). I created a DelayedLuceneFacetProvider
that opens acquires and releases the searcher when needed (acquireIndexNode,
release in finally).
It would be good if the test can reproduce the issue even without the delays;
we can discuss this.
> On querying, IndexReader failed with AlreadyClosedException
> -----------------------------------------------------------
>
> Key: OAK-8898
> URL: https://issues.apache.org/jira/browse/OAK-8898
> Project: Jackrabbit Oak
> Issue Type: Bug
> Reporter: Mohit Kataria
> Priority: Major
>
> This is an intermittent issue, where on querying the code throws
> AlreadyClosedException.
>
> {code:java}
> Caused by: org.apache.lucene.store.AlreadyClosedException: this IndexReader
> is closed
> at org.apache.lucene.index.IndexReader.ensureOpen(IndexReader.java:262)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> at
> org.apache.lucene.index.BaseCompositeReader.document(BaseCompositeReader.java:108)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> at org.apache.lucene.index.IndexReader.document(IndexReader.java:446)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> at
> org.apache.jackrabbit.oak.plugins.index.lucene.util.StatisticalSortedSetDocValuesFacetCounts.getAccessibleSampleCount(StatisticalSortedSetDocValuesFacetCounts.java:169)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> at
> org.apache.jackrabbit.oak.plugins.index.lucene.util.StatisticalSortedSetDocValuesFacetCounts.getTopChildren0(StatisticalSortedSetDocValuesFacetCounts.java:104)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> at
> org.apache.jackrabbit.oak.plugins.index.lucene.util.StatisticalSortedSetDocValuesFacetCounts.getTopChildren(StatisticalSortedSetDocValuesFacetCounts.java:70)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> at
> org.apache.lucene.facet.MultiFacets.getTopChildren(MultiFacets.java:52)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> at
> org.apache.jackrabbit.oak.plugins.index.lucene.LucenePropertyIndex$LuceneFacetProvider.getFacets(LucenePropertyIndex.java:1547)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> at
> org.apache.jackrabbit.oak.plugins.index.search.spi.query.FulltextIndex$FulltextResultRow.getFacets(FulltextIndex.java:353)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> at
> org.apache.jackrabbit.oak.plugins.index.search.spi.query.FulltextIndex$FulltextPathCursor$2.getValue(FulltextIndex.java:472)
> [org.apache.jackrabbit.oak-lucene:1.10.2]
> ... 237 common frames omitted
> {code}
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