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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-20416) LLAP: Fail to package LLAP if the Xmx computed is too low
Date Fri, 17 Aug 2018 22:44:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-20416?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gopal V reassigned HIVE-20416:
------------------------------

    Assignee: Gopal V

> LLAP: Fail to package LLAP if the Xmx computed is too low
> ---------------------------------------------------------
>
>                 Key: HIVE-20416
>                 URL: https://issues.apache.org/jira/browse/HIVE-20416
>             Project: Hive
>          Issue Type: Bug
>          Components: llap
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Major
>
> {code}
>       if (options.getXmx() != -1) {
>         // Needs more explanation here
>         // Xmx is not the max heap value in JDK8. You need to subtract 50% of the survivor
fraction
>         // from this, to get actual usable memory before it goes into GC
>         xmx = options.getXmx();
>         long xmxMb = (xmx / (1024L * 1024L));
>         conf.setLong(ConfVars.LLAP_DAEMON_MEMORY_PER_INSTANCE_MB.varname, xmxMb);
>         propsDirectOptions.setProperty(ConfVars.LLAP_DAEMON_MEMORY_PER_INSTANCE_MB.varname,
>             String.valueOf(xmxMb));
> {code}
> needs a check for the value being so low that start-up (or all queries) will fail.



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