[jira] [Created] (YARN-2078) yarn.app.am.resource.mb/cpu-vcores affects uber mode but is not documented

[Tsuyoshi OZAWA (JIRA)]

Tsuyoshi OZAWA created YARN-2078:
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             Summary: yarn.app.am.resource.mb/cpu-vcores affects uber mode but 
is not documented
                 Key: YARN-2078
                 URL: https://issues.apache.org/jira/browse/YARN-2078
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Tsuyoshi OZAWA
            Assignee: Tsuyoshi OZAWA
            Priority: Trivial


We should document the condition when uber mode is enabled. If not, users need 
to read code.

{code}
    boolean smallMemory =
        ( (Math.max(conf.getLong(MRJobConfig.MAP_MEMORY_MB, 0),
            conf.getLong(MRJobConfig.REDUCE_MEMORY_MB, 0))
            <= sysMemSizeForUberSlot)
            || (sysMemSizeForUberSlot == JobConf.DISABLED_MEMORY_LIMIT));
   boolean smallCpu =
            Math.max(
                conf.getInt(
                    MRJobConfig.MAP_CPU_VCORES, 
                    MRJobConfig.DEFAULT_MAP_CPU_VCORES), 
                conf.getInt(
                    MRJobConfig.REDUCE_CPU_VCORES, 
                    MRJobConfig.DEFAULT_REDUCE_CPU_VCORES)) 
             <= sysCPUSizeForUberSlot
{code}



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