You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@maven.apache.org by bernulfiskus <be...@stiwa.com> on 2006/11/03 13:31:36 UTC
Nullpointer-Exception addPlugin
Hi!
I'm new with Maven - i created a simple sample-project, if i compile the
project i get a nullpointer-Exception!
I'm behind a firewall, a proxy is configured...
Any Idea?
Bernie
[INFO] Building Maven Default Project
[INFO] task-segment: [compile]
[INFO]
----------------------------------------------------------------------------
[DEBUG] maven-resources-plugin: resolved to version 2.2 from repository
central
[DEBUG] Retrieving parent-POM: org.apache.maven.plugins:maven-plugins::1 for
project: null:maven-r
plugin:2.2 from the repository.
[DEBUG] Retrieving parent-POM: org.apache.maven:maven-parent::1 for project:
org.apache.maven.plug
1 from the repository.
[DEBUG] Retrieving parent-POM: org.apache:apache::1 for project:
org.apache.maven:maven-parent:pom
.
[INFO]
------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO]
------------------------------------------------------------------------
[INFO] null
[INFO]
------------------------------------------------------------------------
[DEBUG] Trace
java.lang.NullPointerException
at
org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:292)
--
View this message in context: http://www.nabble.com/Nullpointer-Exception-addPlugin-tf2567630s177.html#a7156625
Sent from the Maven - Users mailing list archive at Nabble.com.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
For additional commands, e-mail: users-help@maven.apache.org
Re: Nullpointer-Exception addPlugin
Posted by franz see <fr...@gmail.com>.
Good day to you, Sha Jiang,
Maven-dependency-plugin is the same as dependency-maven-plugin. The
difference is that the former is from apache, while the latter is from
codehaus. But they are basically one and the same.
However, maven-dependency-plugin is not yet released (though it is scheduled
to be soon). Thus, if you don't want to use a snapshot version, use the
codehause dependency-maven-plugin.
Cheers,
Franz
jiangshachina wrote:
>
> Dear Wayne,
> I had the same error.
> With your hint, I removed some artifacts carefully and gradually.
> Finally found that plugin maven:maven-dependency-plugin:1.0 caused the
> matter.
> Deleting the plugin would be OK.
>
> Additionally, if I don't specify plugin in POM, and run "mvn
> dependency:copy-dependencies",
> Maven will use plugin org.codehaus.mojo:dependency-maven-plugin:1.0.
> Why Maven chose dependency-maven-plugin, but maven-dependency-plugin, by
> default?
>
> a cup of Java, cheers!
> Sha Jiang
>
>
> Wayne Fay wrote:
>>
>> You can run with mvn -X ...to get more specific debugging information
>> about what plugin is causing your problems etc.
>>
>> However, I'd just delete your local Maven2 repository
>> (~/.m2/repository) and try again. Maven will automatically download
>> the files it needs to construct your project.
>>
>> I'd suspect that you have simply managed to get a "bad" plugin JAR in
>> your repo somewhere. Especially given that you're behind a firewall --
>> many people attempt to run Maven without configuring things at first
>> and end up with corrupt JARs etc. Then they realize they need to
>> configure their firewall proxy and the old corrupt artifacts are still
>> waiting in your ~/.m2 repo to bite you in the future.
>>
>> Wayne
>>
>> On 11/3/06, bernulfiskus <be...@stiwa.com> wrote:
>>>
>>> Hi!
>>>
>>> I'm new with Maven - i created a simple sample-project, if i compile the
>>> project i get a nullpointer-Exception!
>>> I'm behind a firewall, a proxy is configured...
>>>
>>> Any Idea?
>>>
>>> Bernie
>>>
>>>
>>> [INFO] Building Maven Default Project
>>> [INFO] task-segment: [compile]
>>> [INFO]
>>> ----------------------------------------------------------------------------
>>> [DEBUG] maven-resources-plugin: resolved to version 2.2 from repository
>>> central
>>> [DEBUG] Retrieving parent-POM: org.apache.maven.plugins:maven-plugins::1
>>> for
>>> project: null:maven-r
>>> plugin:2.2 from the repository.
>>> [DEBUG] Retrieving parent-POM: org.apache.maven:maven-parent::1 for
>>> project:
>>> org.apache.maven.plug
>>> 1 from the repository.
>>> [DEBUG] Retrieving parent-POM: org.apache:apache::1 for project:
>>> org.apache.maven:maven-parent:pom
>>> .
>>> [INFO]
>>> ------------------------------------------------------------------------
>>> [ERROR] FATAL ERROR
>>> [INFO]
>>> ------------------------------------------------------------------------
>>> [INFO] null
>>> [INFO]
>>> ------------------------------------------------------------------------
>>> [DEBUG] Trace
>>> java.lang.NullPointerException
>>> at
>>> org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:292)
>>>
>>>
>>> --
>>> View this message in context:
>>> http://www.nabble.com/Nullpointer-Exception-addPlugin-tf2567630s177.html#a7156625
>>> Sent from the Maven - Users mailing list archive at Nabble.com.
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
>>> For additional commands, e-mail: users-help@maven.apache.org
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
>> For additional commands, e-mail: users-help@maven.apache.org
>>
>>
>>
>
>
--
View this message in context: http://www.nabble.com/Nullpointer-Exception-addPlugin-tf2567630s177.html#a7555609
Sent from the Maven - Users mailing list archive at Nabble.com.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
For additional commands, e-mail: users-help@maven.apache.org
Re: Nullpointer-Exception addPlugin
Posted by jiangshachina <ji...@gmail.com>.
Dear Wayne,
I had the same error.
With your hint, I removed some artifacts carefully and gradually.
Finally found that plugin maven:maven-dependency-plugin:1.0 caused the
matter.
Deleting the plugin would be OK.
Additionally, if I don't specify plugin in POM, and run "mvn
dependency:copy-dependencies",
Maven will use plugin org.codehaus.mojo:dependency-maven-plugin:1.0.
Why Maven chose dependency-maven-plugin, but maven-dependency-plugin, by
default?
a cup of Java, cheers!
Sha Jiang
Wayne Fay wrote:
>
> You can run with mvn -X ...to get more specific debugging information
> about what plugin is causing your problems etc.
>
> However, I'd just delete your local Maven2 repository
> (~/.m2/repository) and try again. Maven will automatically download
> the files it needs to construct your project.
>
> I'd suspect that you have simply managed to get a "bad" plugin JAR in
> your repo somewhere. Especially given that you're behind a firewall --
> many people attempt to run Maven without configuring things at first
> and end up with corrupt JARs etc. Then they realize they need to
> configure their firewall proxy and the old corrupt artifacts are still
> waiting in your ~/.m2 repo to bite you in the future.
>
> Wayne
>
> On 11/3/06, bernulfiskus <be...@stiwa.com> wrote:
>>
>> Hi!
>>
>> I'm new with Maven - i created a simple sample-project, if i compile the
>> project i get a nullpointer-Exception!
>> I'm behind a firewall, a proxy is configured...
>>
>> Any Idea?
>>
>> Bernie
>>
>>
>> [INFO] Building Maven Default Project
>> [INFO] task-segment: [compile]
>> [INFO]
>> ----------------------------------------------------------------------------
>> [DEBUG] maven-resources-plugin: resolved to version 2.2 from repository
>> central
>> [DEBUG] Retrieving parent-POM: org.apache.maven.plugins:maven-plugins::1
>> for
>> project: null:maven-r
>> plugin:2.2 from the repository.
>> [DEBUG] Retrieving parent-POM: org.apache.maven:maven-parent::1 for
>> project:
>> org.apache.maven.plug
>> 1 from the repository.
>> [DEBUG] Retrieving parent-POM: org.apache:apache::1 for project:
>> org.apache.maven:maven-parent:pom
>> .
>> [INFO]
>> ------------------------------------------------------------------------
>> [ERROR] FATAL ERROR
>> [INFO]
>> ------------------------------------------------------------------------
>> [INFO] null
>> [INFO]
>> ------------------------------------------------------------------------
>> [DEBUG] Trace
>> java.lang.NullPointerException
>> at
>> org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:292)
>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Nullpointer-Exception-addPlugin-tf2567630s177.html#a7156625
>> Sent from the Maven - Users mailing list archive at Nabble.com.
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
>> For additional commands, e-mail: users-help@maven.apache.org
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
> For additional commands, e-mail: users-help@maven.apache.org
>
>
>
--
View this message in context: http://www.nabble.com/Nullpointer-Exception-addPlugin-tf2567630s177.html#a7519773
Sent from the Maven - Users mailing list archive at Nabble.com.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
For additional commands, e-mail: users-help@maven.apache.org
Re: Nullpointer-Exception addPlugin
Posted by Wayne Fay <wa...@gmail.com>.
You can run with mvn -X ...to get more specific debugging information
about what plugin is causing your problems etc.
However, I'd just delete your local Maven2 repository
(~/.m2/repository) and try again. Maven will automatically download
the files it needs to construct your project.
I'd suspect that you have simply managed to get a "bad" plugin JAR in
your repo somewhere. Especially given that you're behind a firewall --
many people attempt to run Maven without configuring things at first
and end up with corrupt JARs etc. Then they realize they need to
configure their firewall proxy and the old corrupt artifacts are still
waiting in your ~/.m2 repo to bite you in the future.
Wayne
On 11/3/06, bernulfiskus <be...@stiwa.com> wrote:
>
> Hi!
>
> I'm new with Maven - i created a simple sample-project, if i compile the
> project i get a nullpointer-Exception!
> I'm behind a firewall, a proxy is configured...
>
> Any Idea?
>
> Bernie
>
>
> [INFO] Building Maven Default Project
> [INFO] task-segment: [compile]
> [INFO]
> ----------------------------------------------------------------------------
> [DEBUG] maven-resources-plugin: resolved to version 2.2 from repository
> central
> [DEBUG] Retrieving parent-POM: org.apache.maven.plugins:maven-plugins::1 for
> project: null:maven-r
> plugin:2.2 from the repository.
> [DEBUG] Retrieving parent-POM: org.apache.maven:maven-parent::1 for project:
> org.apache.maven.plug
> 1 from the repository.
> [DEBUG] Retrieving parent-POM: org.apache:apache::1 for project:
> org.apache.maven:maven-parent:pom
> .
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] FATAL ERROR
> [INFO]
> ------------------------------------------------------------------------
> [INFO] null
> [INFO]
> ------------------------------------------------------------------------
> [DEBUG] Trace
> java.lang.NullPointerException
> at
> org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:292)
>
>
> --
> View this message in context:
> http://www.nabble.com/Nullpointer-Exception-addPlugin-tf2567630s177.html#a7156625
> Sent from the Maven - Users mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
> For additional commands, e-mail: users-help@maven.apache.org
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
For additional commands, e-mail: users-help@maven.apache.org