[IGNITE-16031] ScanQuery returns duplicated data

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.11
• Ignite Flags: Docs Required, Release Notes Required
• Assignee: Maksim Timonin
• Reporter: Maksim Timonin
• Created: 30/Nov/21 19:34
• Updated: 09/Dec/21 13:13

Description

ScanQuery doesn't sync topology version over different nodes, so when query runs on different node it can run over different topologies and can have duplicated primary partition.

 

```

ignite = startGrids(1);

cache = ignite.cache(CACHE);

cache.put(1L, new Person(0, 1));
cache.put(2L, new Person(1, 0));
cache.put(3L, new Person(1, 1));

ScanQuery qry = new ScanQuery();

startGrid(nodesCnt);

Thread.sleep(10);

List<Cache.Entry<Long, Person>> result = cache.query(qry).getAll();

assertEquals(3, result.size());  // Sometimes fails, and returns duplicated key=1

```

Issue Links

• links to: Dev list discussion