I think I know where this problem comes from. There is a limitation to maven
that sometimes get misused. In this specific case there is a super parent
containing a lot of common stuff of which only a few need, and some needs
certain parts of it and some needs other parts. I have seen other strange
problems when inheriting from this parent (like producing unreadable
artifacts!) that have simply gone away when I remove the inheritance to it,
which I only can do where there really are no dependencies on it or in the
parent chain up to it.
But I understand that people do this since the alternative is to duplicate
things over and over where needed. There are however a smart guy that have done
something to help solve this situation:
https://github.com/maoo/maven-tiles
I've used it in other projects and it works quite nice. It allows you to break
out common functionality into separate artifacts delivering only a pom. Then
these tile poms are included where needed, and you can create several tiles for
different things and in each case include those you need. This removes the need
for everything and more in a super parent for all.
/Tommy
28 nov 2013 kl. 18:12 skrev Tommy Svensson <[email protected]>:
> Actually, if maven is failing to see the project being built (itself) it
> would explain both that it tries to download its own pom and that the first
> module child fails to see the parent.
>
> But what would make it fail to se itself ? It is a valid pom and it is called
> pom.xml.
>
> Regards,
> Tommy Svensson
>
>
> 28 nov 2013 kl. 18:04 skrev Tommy Svensson <[email protected]>:
>
>> I did remove my local repository files (~/.m2/repository/...) and did an
>> "mvn install" and got this exact problem myself!
>>
>> I'm however completely failing to understand why. I tried to add
>> "<relativePath>..</relativePath> to the "install" module but that made no
>> difference and since ".." is the one and only relative path to the parent it
>> should make no difference, so I guess that was correct :-). And why does it
>> start with trying to download the pom of the project I'm building. It is
>> available right there in the catalog I'm standing in when running "mvn
>> install". It should be downloading its parent pom, which it does and
>> succeeds with, but it should not be trying to download itself since it is
>> already running itself, and thus already have itself.
>>
>> Do note that the top parent (the one being successfully downloaded) does not
>> contain any modules! It only provides plugins, properties, etc. It has no
>> knowledge of its children.
>>
>> Regards,
>> Tommy Svensson
>>
>>
>> 28 nov 2013 kl. 17:33 skrev Tommy Svensson <[email protected]>:
>>
>>>
>>> 28 nov 2013 kl. 15:39 skrev Nick Stolwijk <[email protected]>:
>>>
>>>> Probably you have the xxx-shared artifact already in your local repository
>>>> from an earlier invocation, so it won't get looked up in Nexus, while your
>>>> colleague doesn't.
>>>>
>>>> I think your parent part of the pom should look something like this:
>>>>
>>>> <parent>
>>>> <groupId>xxx.xxx.xxx</groupId>
>>>> <artifactId>xxx-shared</artifactId>
>>>> <version>2.0.26-SNAPSHOT</version>
>>>> <relativePath>../xxx-shared/pom.xml</relativePath>
>>>> </parent>
>>>
>>> It is *at* this parent that the "mvn clean" is done! The one failing is a
>>> module of this and is residing with a correct relative path to this parent.
>>>
>>> But it is correct that only I have this artifact in my local repository
>>> since my colleague are failing to build this due to this problem.
>>>
>>>>
>>>> Try to empty your local repository (~/.m2/repository/xxx/xxx/xxx/ and
>>>> rebuild. I guess without setting the relativePath you will see the same
>>>> error as your colleague.
>>>
>>> The relative path is ".." and should thus be correct. But "cleaning" my
>>> ~/.m2/repository/... artifacts is probably a good test to do anyhow.
>>>
>>> Thanks,
>>> Tommy Svensson
>>>
>>>
>>>>
>>>> Hth,
>>>>
>>>> Nick Stolwijk
>>>> On Thu, Nov 28, 2013 at 3:32 PM, Tommy Svensson <[email protected]> wrote:
>>>>
>>>>> <parent>
>>>>> <groupId>xxx.xxx.xxx</groupId>
>>>>> <artifactId>xxx-shared</artifactId>
>>>>> <version>2.0.26-SNAPSHOT</version>
>>>>> </parent>
>>>>>
>>>>
>>>>
>>>>
>>>> Nick Stolwijk
>>>>
>>>> ~~~ Try to leave this world a little better than you found it and, when
>>>> your turn comes to die, you can die happy in feeling that at any rate you
>>>> have not wasted your time but have done your best ~~~
>>>>
>>>> Lord Baden-Powell
>>>
>>>
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