[jira] [Created] (IGNITE-16177) Snapshot restore operation may hang if cache contains "empty" partitions

["Pavel Pereslegin (Jira)" <ji...@apache.org>]

Pavel Pereslegin created IGNITE-16177:
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             Summary: Snapshot restore operation may hang if cache contains "empty" partitions
                 Key: IGNITE-16177
                 URL: https://issues.apache.org/jira/browse/IGNITE-16177
             Project: Ignite
          Issue Type: Bug
            Reporter: Pavel Pereslegin


The snapshot restore may hang when some of the cache group partitions have not been physically created (for example, there is not enough data in the cache).

Reproducer

{code:java}
public class IgniteClusterSnapshotRestoreEmptyPartsTest extends IgniteClusterSnapshotRestoreBaseTest {
    @Test
    public void testRestoreWithEmptyPartition() throws Exception {
        // Cache with 1024 partitions.
        CacheConfiguration<Integer, Object> cacheCfg1 = new CacheConfiguration<>(CACHE1);

        // Add only 10 keys (only 10 partitions will be created on the disk).
        IgniteEx ignite = startGridsWithCache(1, 1024, Integer::new, cacheCfg1);

        // Snapshot contains only 10 (out of 1024 "affinity" partitions).
        ignite.snapshot().createSnapshot(SNAPSHOT_NAME).get(TIMEOUT);

        ignite.cache(CACHE1).destroy();

        // The restore operation hangs during the "preload" phase.
        ignite.snapshot().restoreSnapshot(SNAPSHOT_NAME, null).get(TIMEOUT);
    }
}
{code}




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