eye-gu opened a new issue, #18330: URL: https://github.com/apache/dolphinscheduler/issues/18330
### Search before asking - [x] I had searched in the [issues](https://github.com/apache/dolphinscheduler/issues?q=is%3Aissue) and found no similar issues. ### What happened https://github.com/apache/dolphinscheduler/blob/c9e373e30bda27f1d3fa6d0273264f03c2f2ccb6/dolphinscheduler-datasource-plugin/dolphinscheduler-datasource-hive/src/main/java/org/apache/dolphinscheduler/plugin/datasource/hive/security/UserGroupInformationFactory.java#L42-L90 In UserGroupInformationFactory, login() and logout() are synchronized, but the static initializer schedules a background Kerberos renewal task that reads the same HashMap without synchronization. This will cause ConcurrentModificationException ### What you expected to happen Kerberos renewal thread should safely iterate the map ### How to reproduce Occasional ### Anything else _No response_ ### Version dev ### Are you willing to submit PR? - [x] Yes I am willing to submit a PR! ### Code of Conduct - [x] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
