[IGNITE-12905] QueryKeyValueIterable missing custom spliterator() implementation

• Type: Bug
• Status: Patch Available
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 2.8
• Component/s: cache, general

Environment

Windows 10
JDK 1.8.0_172
ignite-core 2.8.0
reactor-core 3.3.3

• Assignee: Johnny Galatikitis
• Reporter: Johnny Galatikitis
• Created: 16/Apr/20 09:24
• Updated: 01/Mar/21 09:37

Description

We are using apache ignite with reactor-core and since reactors upgrade from 3.2.12 to 3.3.3

org.apache.ignite.internal.processors.query.QueryKeyValueIterable.iterator

is called multiple times. It starts with:
1. calling iterable.spliterator().hasCharacteristics(Spliterator.SIZED), where iterable is instanceof QueryKeyValueIterable
2. calls default implementation Spliterators.spliteratorUnknownSize(iterator(), 0)
3. which in turn calls ignite's QueryKeyValueIterable.iterator() call and that "uses it up" for subsequent calls, i.e. throw IgniteException "Iterator is already fetched or query was cancelled."

Issue Links

• links to: GitHub Pull Request #7704
• links to: GitHub Pull Request #7704