Hong Zhiguo created YARN-6319: --------------------------------- Summary: race condition between deleting app dir and deleting container dir Key: YARN-6319 URL: https://issues.apache.org/jira/browse/YARN-6319 Project: Hadoop YARN Issue Type: Bug Components: nodemanager Reporter: Hong Zhiguo Assignee: Hong Zhiguo
Last container (on one node) of one app complete | --> triggers async deletion of container dir (container cleanup) | --> triggers async deletion of app dir (app cleanup) For LCE, deletion is done by container-executor. The "app cleanup" lists sub-dir (step 1), and then unlink items one by one(step 2). If a file is deleted by "container cleanup" between step 1 and step2, it'll report below error and breaks the deletion. {code} ContainerExecutor: Couldn't delete file $LOCAL/usercache/$USER/appcache/application_1481785469354_353539/container_1481785469354_353539_01_000028/$FILE - No such file or directory {code} This app dir then escape the cleanup. And that's why we always have many app dirs left there. solution 1: just ignore the error without breaking in container-executor.c::delete_path() solution 2: use a lock to serialize the cleanup of same app dir. solution 3: backoff and retry on error Suggestions are welcome. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org