mikemccand opened a new issue, #12916: URL: https://github.com/apache/lucene/issues/12916
### Description There is an exciting [upstream (OpenJ9) comment here](https://github.com/eclipse-openj9/openj9/issues/18400#issuecomment-1846199023) (thank you @singh264), copied below: The intermittent assertion failure in [testSegmentCountOnFlushRandom](https://github.com/apache/lucene/blob/5e1e6c9e6818be115ff76010d5fc766758b21bbe/lucene/core/src/test/org/apache/lucene/index/TestIndexWriterThreadsToSegments.java#L175) seems to have started after https://github.com/apache/lucene/commit/bae5b338ed93b352062e6feb8321945fbed11ca5 was added in the lucene repo, and a solution to fix the intermittent assertion failure is to make the [DocumentsWriterPerThreadPool.getAndLock()](https://github.com/apache/lucene/blob/5e1e6c9e6818be115ff76010d5fc766758b21bbe/lucene/core/src/java/org/apache/lucene/index/DocumentsWriterPerThreadPool.java#L115) method synchronized as it seems to fix a race condition that occurs while multiple threads concurrently add documents to an index during the test. I have not looked closely yet ... ### Version and environment details _No response_ -- 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: issues-unsubscr...@lucene.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
