steveloughran commented on PR #41105: URL: https://github.com/apache/spark/pull/41105#issuecomment-1542317728
don't remember the cache stuff, sorry. I know we have a problem in hadoop where cache lookup can trigger >1 fs creation and the same time, and if that is slow then at best: needless work, at worst: conflict and sometimes failures. so we use a semaphore to limit the #of threads which can create a new FS at the same time (HADOOP-17313). spark/tez workers and cloud stores doing network IO in initialize() are the troublespot here, FWIW. -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
