Marco Massenzio created MESOS-3340:
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Summary: Command-line flags should take precedence over OS Env
variables
Key: MESOS-3340
URL: https://issues.apache.org/jira/browse/MESOS-3340
Project: Mesos
Issue Type: Improvement
Components: stout
Affects Versions: 0.24.0
Reporter: Marco Massenzio
Currently, it appears that re-defining a flag on the command-line that was
already defined via a OS Env var ({{MESOS_*}}) causes the Master to fail with a
not very helpful message.
For example, if one has {{MESOS_QUORUM}} defined, this happens:
{noformat}
$ ./mesos-master --zk=zk://192.168.1.4/mesos --quorum=1 --hostname=192.168.1.4
--ip=192.168.1.4
Duplicate flag 'quorum' on command line
{noformat}
which is not very helpful.
Ideally, we would parse the flags with a "well-known" priority (command-line
first, environment last) - but at the very least, the error message should be
more helpful in explaining what the issue is.
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