cxzl25 opened a new pull request #29605: URL: https://github.com/apache/spark/pull/29605
### What changes were proposed in this pull request? This PR increases the thread safety of the `BytesToBytesMap`: - It makes the `iterator()` and `destructiveIterator()` methods used their own `Location` object. This used to be shared, and this was causing issues when the map was being iterated over in two threads by two different iterators. - Removes the `safeIterator()` function. This is not needed anymore. - Improves the documentation of a couple of methods w.r.t. thread-safety. ### Why are the changes needed? It is unexpected an iterator shares the object it is returning with all other iterators. This is a violation of the iterator contract, and it causes issues with iterators over a map that are consumed in different threads. ### Does this PR introduce any user-facing change? No ### How was this patch tested? add ut ---------------------------------------------------------------- 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: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
