Szilard Nemeth created YARN-9419: ------------------------------------ Summary: Log a warning if GPU isolation is enabled but LinuxContainerExecutor is disabled Key: YARN-9419 URL: https://issues.apache.org/jira/browse/YARN-9419 Project: Hadoop YARN Issue Type: Bug Reporter: Szilard Nemeth
A WARN log should be added at least (logged once on startup) that notifies the user about a potentially offending configuration: GPU isolation is enabled but LCE is disabled. I think this is a dangerous, yet valid configuration: As LCE is the only container executor that utilizes cgroups, no real HW-isolation happens if LCE is disabled. Let's suppose we have 2 GPU devices in 1 node: # NM reports 2 devices (as a Resource) to RM # RM assigns GPU#1 to container#2 that requests 1 GPU device # When container#2 is also requesting 1 GPU device, RM is going to assign either GPU#1 or GPU#2, so there's no guarantee that GPU#2 will be assigned. If GPU#1 is assigned to a second container, nasty things could happen. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org