[jira] [Created] (KAFKA-15271) TimelineHashMap.entrySet yield unexpected results with nested TimelineHashMap

[David Jacot (Jira)]

David Jacot created KAFKA-15271:
-----------------------------------

             Summary: TimelineHashMap.entrySet yield unexpected results with 
nested TimelineHashMap
                 Key: KAFKA-15271
                 URL: https://issues.apache.org/jira/browse/KAFKA-15271
             Project: Kafka
          Issue Type: Bug
            Reporter: David Jacot


Example:
{code:java}
@Test
    public void bug() {
        SnapshotRegistry snapshotRegistry = new SnapshotRegistry(new 
LogContext());
        // Topic -> Partition -> Offset
        TimelineHashMap<String, TimelineHashMap<Integer, Long>> offsets =
            new TimelineHashMap<>(snapshotRegistry, 0);

        snapshotRegistry.getOrCreateSnapshot(0);

        offsets
            .computeIfAbsent("foo", __ -> new 
TimelineHashMap<>(snapshotRegistry, 0))
            .put(0, 100L);

        snapshotRegistry.getOrCreateSnapshot(1);

        offsets
            .computeIfAbsent("foo", __ -> new 
TimelineHashMap<>(snapshotRegistry, 0))
            .put(1, 110L);

        snapshotRegistry.getOrCreateSnapshot(2);

        offsets
            .computeIfAbsent("foo", __ -> new 
TimelineHashMap<>(snapshotRegistry, 0))
            .put(1, 111L);

        assertNull(offsets.get("foo", 1).get(1, 1));

        offsets.entrySet(1).forEach(topicEntry -> {
            System.out.println(topicEntry.getKey());
            topicEntry.getValue().entrySet(1).forEach(partitionEntry -> {
                System.out.println(partitionEntry.getKey() + " : " + 
partitionEntry.getValue());
            });
        });

        /*
            The above code prints:
                foo
                0 : 100
                1 : 110

            but should rather print:
                foo
                0 : 100
         */
    } {code}
It yields the expected result when the third put is removed. 



--
This message was sent by Atlassian Jira
(v8.20.10#820010)