Maven 2 & 3

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: None
• Fix Version/s: 2.0-alpha-2
• Component/s: Plugins and Lifecycle
• Labels:

  None
• Environment:

  all (linux/jdk1.5)

I got the following error

java.lang.IllegalStateException: Plugin descriptor ID incomplete: null:null:null
at org.apache.maven.plugin.descriptor.PluginDescriptor.getId(PluginDescriptor.java:112)
at org.apache.maven.plugin.DefaultPluginManager.componentDiscovered(DefaultPluginManager.java:129)
....

I fixed the errormessage to include the location of the Plugin Descriptor plugin.xml file.
To do that, I had to modify PluginDescriptor to add a 'source' attribute; modify maven-core's
MavenPluginDiscoverer to not disregard the source parameter and pass it on to maven-plugin-descriptor's
PluginDescriptorBuilder (retaining backwards compatiblity) and set it there.

Now the errormessage looks like:

java.lang.IllegalStateException: Plugin descriptor ID incomplete: null:null:null in jar:file:/home/forge/.m2/repository/org/apache/maven/plugins/maven-war-plugin/1.0-SNAPSHOT/maven-war-plugin-1.0-20050405.162144-1.jar!/META-INF/maven/plugin.xml
at org.apache.maven.plugin.descriptor.PluginDescriptor.getId(PluginDescriptor.java:112)
at org.apache.maven.plugin.DefaultPluginManager.componentDiscovered(DefaultPluginManager.java:130)

which is a lot more helpful to me.

I thought I'd share this with you, hoping you'll find it useful enough to incorporate it.

By the way, this exception is triggered in a new NullpointerException (in DefaultPluginManager)
warning about the PluginDescriptor's version being null; while constructing this message another
exception is triggered, so the original error doesn't get through at all.

For the record, I tried to enhance Plexus' ComponentSetDescriptor, but found I could only access
the source (parameter) in 2 out of 5 places without API modification, so I abandoned this approach,
but it might prove wise to include the source there, rather than in the special case of maven's PluginManager.

1. 

   MNG.patch

   07/May/05 7:34 AM

   3 kB

   Kenney Westerhof

• Assignee:

  Unassigned

  Reporter:

  Kenney Westerhof

• Created:

  07/May/05 7:33 AM

  Updated:

  01/Feb/06 2:43 PM

  Resolved:

  08/May/05 7:22 PM