[ https://issues.apache.org/jira/browse/HBASE-4391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13290307#comment-13290307 ]
Matteo Bertozzi commented on HBASE-4391: ---------------------------------------- todd's code looks good to me. One way to avoid using root to start the RS is adding hbase user to /etc/security/limits.d/ {code}echo "$USER - memlock $MAX_MEMLOCK_SIZE" >/etc/security/limits.d/$USER.conf{code} If this will be integrated in hbase, do you want to force everyone to use root or add hbase user in limits.d to start RS? or we can add some --no-swap flag to region server start script? > Add ability to start RS as root and call mlockall > ------------------------------------------------- > > Key: HBASE-4391 > URL: https://issues.apache.org/jira/browse/HBASE-4391 > Project: HBase > Issue Type: New Feature > Components: regionserver > Affects Versions: 0.94.0 > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Fix For: 0.96.0 > > > A common issue we've seen in practice is that users oversubscribe their > region servers with too many MR tasks, etc. As soon as the machine starts > swapping, the RS grinds to a halt, loses ZK session, aborts, etc. > This can be combatted by starting the RS as root, calling mlockall(), and > then setuid down to the hbase user. We should not require this, but we should > provide it as an option. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira