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From "haosdent huang" <haosd...@gmail.com>
Subject Re: Review Request 38259: [MESOS-3340] Command-line flags should take precedence over OS Env variables
Date Thu, 10 Sep 2015 16:42:20 GMT


> On Sept. 10, 2015, 4:40 p.m., haosdent huang wrote:
> > LGTM. But I not sure if this match @marco expect. Could you add he as reviewers?
So currently your approach is show error message when `duplicates` is true. Use command line
parameters when command line variables conflict with environment variables. I also suggest
add comment and test cases about the last condition.

```
Use command line parameters when command line variables conflict with environment variables.
```
->
```
When duplicates is false, use command line parameters while ignore environment variables.
```


- haosdent


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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/38259/#review98410
-----------------------------------------------------------


On Sept. 10, 2015, 3:47 p.m., Klaus Ma wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/38259/
> -----------------------------------------------------------
> 
> (Updated Sept. 10, 2015, 3:47 p.m.)
> 
> 
> Review request for mesos and Bernd Mathiske.
> 
> 
> Bugs: MESOS-3340
>     https://issues.apache.org/jira/browse/MESOS-3340
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> 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:
> 
>     $ ./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
> 
> which is not very helpful.
> 
> Current solution is to throw error if any duplication; over-write may make user confused
about the result.
> 
> 
> Diffs
> -----
> 
>   3rdparty/libprocess/3rdparty/stout/include/stout/flags/flags.hpp 9da213f802aec6a7768ce6f5aea7b437d980356a

>   3rdparty/libprocess/3rdparty/stout/tests/flags_tests.cpp ebf8cd656625b7fd414cacaa87f156c95df29438

> 
> Diff: https://reviews.apache.org/r/38259/diff/
> 
> 
> Testing
> -------
> 
> make
> make check
> 
> 
> Thanks,
> 
> Klaus Ma
> 
>


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