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Greg Phillips commented on YARN-5280: ------------------------------------- [~vvasudev] - thanks for the guidance. I have definitely run out of space in the hadoop tmp dir in the past, and I completely agree that storing the java.policy in the container private directory is a better solution. I have made that modification, and I am currently testing it. For debugging purposes users can inspect the generated java.policy file from within their application using System.getSecurityManager(), or by providing client arguments for security manager debugging. I will include notes on this in the javadoc, and in future feature documentation. The difficulty arises when moving the functionality from prepareContainer to launchContainer. In particular I need to modify the actual java run command instead of the container launch command. The only way I have found to modify the run command found within the launch_container.sh is through the LinuxContainerExecutor#writeLaunchEnv. A method which links the LinuxContainerExecutor with the ContainerRuntime prior to the environment being written seems necessary for this feature. I am very interested in your thoughts on this matter. > Allow YARN containers to run with Java Security Manager > ------------------------------------------------------- > > Key: YARN-5280 > URL: https://issues.apache.org/jira/browse/YARN-5280 > Project: Hadoop YARN > Issue Type: New Feature > Components: nodemanager, yarn > Affects Versions: 2.6.4 > Reporter: Greg Phillips > Assignee: Greg Phillips > Priority: Minor > Labels: oct16-medium > Attachments: YARN-5280.001.patch, YARN-5280.002.patch, > YARN-5280.003.patch, YARN-5280.004.patch, YARN-5280.patch, > YARNContainerSandbox.pdf > > > YARN applications have the ability to perform privileged actions which have > the potential to add instability into the cluster. The Java Security Manager > can be used to prevent users from running privileged actions while still > allowing their core data processing use cases. > Introduce a YARN flag which will allow a Hadoop administrator to enable the > Java Security Manager for user code, while still providing complete > permissions to core Hadoop libraries. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org