Hi,
Using the following recommended value for app_log_dir,
    "site.global.app_log_dir": "${AGENT_LOG_ROOT}/app/log",

I observed the actual log directory having deeply nested structure:

-Dhbase.log.dir=/grid/0/hdp/yarn/log/application_1403300788015_0005/container_1403300788015_0005_01_000003,/grid/1/hdp/yarn/log/application_1403300788015_0005/container_1403300788015_0005_01_000003,/grid/2/hdp/yarn/log/application_1403300788015_0005/container_1403300788015_0005_01_000003,/grid/3/hdp/yarn/log/application_1403300788015_0005/container_1403300788015_0005_01_000003,/grid/4/hdp/yarn/log/application_1403300788015_0005/container_1403300788015_0005_01_000003,/grid/5/hdp/yarn/log/application_1403300788015_0005/container_1403300788015_0005_01_000003/app/log

This was due to ApplicationConstants.Environment.LOG_DIRS containing
all possible locations for app logs.

I tried a few other options and found that the following achieves what
is desired:

    "site.global.app_log_dir": "app/log",

Under 
/grid/4/hdp/yarn/local/usercache/yarn/appcache/application_1403300788015_0007/container_1403300788015_0007_01_000003/app/log/,
I saw:

gc.log-201406241714
hbase-yarn-master-hor12n11.gq1.ygridcore.net.out
hbase-yarn-master-hor12n11.gq1.ygridcore.net.log  SecurityAuth.audit

This is because the app log is bounded by container.

I want to get your opinion on changing recommended app_log_dir value
to reflect the above observation.

Thanks

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