Marcus Eriksson created CASSANDRA-20524:
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Summary: Fix race in CollectionVirtualTableAdapter
Key: CASSANDRA-20524
URL: https://issues.apache.org/jira/browse/CASSANDRA-20524
Project: Apache Cassandra
Issue Type: Bug
Reporter: Marcus Eriksson
Assignee: Marcus Eriksson
{{buildDataRangeIterator}} in {{CollectionVirtualTableAdapter}} uses parallel
streams, this requires the inner map in {{partitionMap}} to be concurrent,
otherwise we could lose rows. This reproduces in
{{CollectionVirtualTableAdapterTest}} when run on JDK21 where several threads
are actually used when calling {{StreamSupport.stream(..., true)}}. It also
reproduces in real scenarios on JDK11 when there are more entries in
{{data.spliterator()}}
I doubt we gain much by having this use parallel streams, we should rewrite it
to be a simple for loop.
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