[
https://issues.apache.org/jira/browse/KAFKA-13856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17527841#comment-17527841
]
Justinwins commented on KAFKA-13856:
------------------------------------
HashMap cannot be "put" and traversed by two threads concurrently, while
`Map<String, List<Checkpoint>> checkpointsPerConsumerGroup` is accessed by
scheduler thread ,and workerTask thread concurrently
> MirrorCheckpointTask meets ConcurrentModificationException
> ----------------------------------------------------------
>
> Key: KAFKA-13856
> URL: https://issues.apache.org/jira/browse/KAFKA-13856
> Project: Kafka
> Issue Type: Bug
> Components: mirrormaker
> Affects Versions: 3.0.1
> Reporter: Justinwins
> Priority: Minor
> Labels: bug
>
> In MirrorCheckpointTask.java, the field
> private Map<String, List<Checkpoint>> checkpointsPerConsumerGroup = new
> HashMap<>
> may be modified ( used with put API) , and traversed by two different
> threads at the same time.
> Clearly,this would incur ConcurrentModificationException.
>
> This bug still exists in Trunk branch.
--
This message was sent by Atlassian Jira
(v8.20.7#820007)
