leventov commented on a change in pull request #8809: Prohibit Futures.addCallback(Future, Callback) URL: https://github.com/apache/incubator-druid/pull/8809#discussion_r355116113
########## File path: indexing-service/src/main/java/org/apache/druid/indexing/seekablestream/SeekableStreamIndexTaskRunner.java ########## @@ -219,6 +221,7 @@ private final List<ListenableFuture<SegmentsAndMetadata>> handOffWaitList = new ArrayList<>(); private final LockGranularity lockGranularityToUse; + private final ExecutorService sequencePersistExecutor; Review comment: In classes that don't have `close()`/`stop()` methods yet, like `SeekableStreamIndexTaskRunner`, they should be introduced if you want to manage an executor. If the class is pretty ephemeral (e. g. many instances of this class routinely start and stop), it should be strongly preferred to create an executor one level up the stack and reuse it for all instances of the class (or all instances of the class within a certain domain e. g. all `SeekableStreamIndexTaskRunner`s associated with a single datasource, or something like that). Note again, I don't actually tell you that this class `SeekableStreamIndexTaskRunner` falls into this category - please figure it out yourself, or consult the maintainers of this subsystem. ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@druid.apache.org For additional commands, e-mail: commits-h...@druid.apache.org
