Note: I'm just getting started with Jenkins plugin development and have never used maven before.
I have successfully set up a sample plugin with maven and the command
line. (HelloWorldBuilder is building and running correctly via mvn
hpi:run.)
I have then installed eclipse (indigo) and the m2e plugin and tried to
import the maven project into eclipse. (Via Import > Existing Maven
Projects)
The project is imported, but it displays two errors:
#pom.xml, line 1 :
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
Project build error: Unresolveable build extension: Plugin
org.jenkins- ci.tools:maven-hpi-plugin:1.72 or one of its dependencies
could not be resolved: Could not find artifact com.sun:tools:jar:1.5
at specified path C:\Programme\Java\jre6/../lib/tools.jar
#pom.xml, line 12 :
<packaging>hpi</packaging>
Project build error: Unknown packaging: hpi
Any ideas?
I have already changed the m2e setting (Window > Preferences > Maven > Installations) for the maven installation to use my maven 2.1.1 that I use on the command line.
I have also tried Right-Click-Project > Maven > Update-Dependencies... / Update-Project-Configuration / and Enable-Workspace-Resolution (whatever these settings mean)
This question seems to describe a similar problem, but I have no clue whether it's a duplicate.
I think your Eclipse installation runs under a Java JRE instead of a Java JDK, this is why the tools jar could not be found.
M2Eclipse normally warns the user about that fact at first startup.
The solution is to specify the jdk executable in the eclipse.ini file like shown below.
add:
-vm
C:/Program Files (x86)/Java/jdk1.6.0_26/bin/javaw.exe
before the line starting with -vmargs
1) As Torsten said you need to use JDK, not JRE.
In Eclipse Window->Preferences
Java / Installed JREs
2) See also Jenkins plug-in developing - Maven issue: Unknown packaging: hpi
Related
How does Eclipse propagate Java 11 "Expose Package..." to the Maven target?
I am exposing a Java 11 module to ALL-UNNAMED using Eclipse: Properties -> Java Build Path -> Module Dependencies -> Expose Package...
Nothing is added to pom.xml with this configuration yet the project builds successfully.
Using Eclipse 2020-06, m2e's maven 3.6.3, maven-compiler-plugin 3.8.1 (this is the only explicit override in pom.xml). The rest is the "EMBEDDED" maven.
When I look at the Maven console and effective pom I do not see any compilerArgs (--add-exports...) added. When I run mvn from the command line I do get compiler failure as expected.
How does m2e propagate --add-exports to javac without it being visible to help:effective-pom target or Maven console?
In Eclipse when I click "Show JPMS Options..." it does display "--add-exports ...", but nowhere in the m2e debug output does this appear.
I am new to maven and am experiencing difficulties while trying to mavenise a Java project.
Setting:
IDE: Eclipse Oxygen.2 Release (4.7.2)
Java: 8
m2e: 1.8.2
What I did:
- copy-pasted the entire original java project and renamed it
- right-click in eclipse: Configure > Convert to Maven project
- in java build path, deletion of libraries import from original local lib repo. The build path shows the Maven Dependencies folder, with the only junit library.
- maven install => downloaded things in the user/.m2/repository/, but not all.
What does not work:
When I try to add a dependency right from a file:
,
nothing pops up in the artifact selection windows, even though there is a commons-logging/ folder in m2/repository
When I try to add the dependency manually in the pom.xml:
<dependency>
<groupId>org.kie.modules</groupId>
<artifactId>org-apache-commons-configuration-main</artifactId>
<version>6.5.0.Final</version>
<type>pom</type>
</dependency>
but the package resolution error still appears in the java file, and I get this warning after Maven install
`[WARNING] The POM for org.kie.modules:org-apache-commons-configuration-main:pom:6.5.0.Final is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details`
I did Maven Update project, eclipse project clean, nothing changes.
My goal for now is just that eclipse understands (at least for one library), that it has to take it from maven repository. I still have many other dependencies to solve (intra-project), but that will be the next step.
Thanks for your help.
The cause of the issue is stated in the warning message :
[WARNING] The POM for
org.kie.modules:org-apache-commons-configuration-main:pom:6.5.0.Final
is invalid, transitive dependencies (if any) will not be available,
enable debug logging for more details
It means that the pom.xml downloaded in your local maven repository exists but is not valid.
Delete the folder of the dependency downloaded in your local maven repository and try again.
If you still have the same problem, check that your central repository that provides the dependency provides also correctly the pom.xml for that.
You can do it by browsing the directory of the dependency from a web browser.
For example we can see that the maven central repository provides a valid pom :
http://central.maven.org/maven2/org/kie/modules/org-apache-commons-collections-main/6.5.0.Final/org-apache-commons-collections-main-6.5.0.Final.pom
I have a maven project in which i am getting the following error. I am using eclipse IDE
An internal error occurred during: "Importing Maven projects".
Unsupported IClasspathEntry kind=4
I have followed below steps for resolving this error. The reason for this error is class path file located in your project folder.
Disable Maven Nature for your project ( If in eclipse, right click on the project --> Maven --> Disable Maven Nature).
Delete the class path file in your project folder.
Re- enable the Maven Nature Again (right click on project --> configure --> Convert to Maven Project).
Try to Maven clean, install and Run the project.
Here's a better answer: stop using eclipse.
Here's the eclipse bug page:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=394042
They seem to have no interest in fixing this issue, so if you require|prefer to use the command line for projects, then really there is no fix but to quit eclipse.
When I create an ejb project through ejb-javaee6 archetype in Eclipse I get the following errors:
Description Resource Path Location Type
Endorsed directory '/home/hfluz/workspace/maven-test/web2/target/endorsed' is missing. You may need to a perform a Maven command line build in order to create it. pom.xml /web2 line 28 Maven Configuration Problem
Description Resource Path Location Type
Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-dependency-plugin:2.1:copy (execution: default, phase: validate) pom.xml /web2 line 53 Maven Project Build Lifecycle Mapping Problem
There is already an /target/endorsed/javaee-endorsed-api-6.0.jar file.
IDE: JBoss Developer Studio 7 Beta 1 (tried with embedded 3.0.4 maven version and also with 3.0.5).
When I generate this same archetype through command line (maven 3.0.4) and import the project to eclipse, these errors are not displayed.
I just tried and the same happens with webapp-javaee6 archetype (also from org.codehaus.mojo.archetypes).
Anyone have any idea about what is causing this issue?
Try refreshing the target folder in eclipse (workspace seems out of sync).
Read http://docs.jboss.org/tools/whatsnew/maven/maven-news-3.3.0.CR1.html about endorsed library support in JBDS/JBT
In Eclipse I imported a maven-based project which uses maven jetty plugin. If I run mvn jetty:run from command line, everything works fine. If I add a run configuration in Eclipse and try to run it, I get the error message:
[ERROR] No plugin found for prefix 'jetty' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (/home/eugene/.m2/repository), central (http://repo1.maven.org/maven2)] -> [Help 1]
In the Eclipe run configuration, I use:
Base directory: ${project_loc}
Goal: jetty:run
Maven Runtime: External
I read the [Help1] page. I don't have pluginGroup settings in maven configuration files, but I have the jetty plugin mentioned in pom.xml, so I guess everything should be fine (especially because everything works in command-line). I tried to "Run as > Maven clean" in Eclipse before executing the jetty run configuration, but it didn't help. Project compiles and passes all tests, only jetty:run does not work in Eclipse.
Please help, I'm an Eclipse & Maven newbie. Thanks in advance.
It does not work for me from command-line either.
Can you check if it works after adding the following in settings.xml as documented?
<pluginGroups>
<pluginGroup>org.mortbay.jetty</pluginGroup>
</pluginGroups>
Also note that there are two different versions of the plugin - the older maven jetty plugin and the newer jetty maven plugin.
I met this problem too, an easier way to solve this is to edit your pom.xml, add following plugin:
<project>
...
<build>
<plugins>
...
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>7.6.8.v20121106</version>
</plugin>
...
</plugins>
</build>
...
</project>
Note:
jetty-maven-plugin is used for jetty version 7 and above, if you want jetty version 6, you should use maven-jetty-plugin
for the version, you may want to have a look at here and here for your desired version's full name.
I apologize for wasting your time. Now I looked through maven warnings which appeared in Eclipse console after I ran the run configuration. I noticed
[WARNING] Failed to retrieve plugin descriptor for Plugin [org.mortbay.jetty:maven-jetty-plugin]: null
so it became obvious why it couldn't recognize jetty: prefix. Couple of lines above I saw a bunch of warnings about missing plugin versions. So I added a version specification for the jetty plugin (<version> entry in pom.xml) and it solved the problem. I forgot a common rule that if something breaks the first thing to check is warnings you get.
I've got this issue in eclipse after importing an appengine project.
The target:
mvn appengine:devserver
The error:
[ERROR] No plugin found for prefix 'appengine' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (/Users/averasko/.m2/repository), central (http://repo.maven.apache.org/maven2)] -> [Help 1]
The problem was in the incorrect base directory in the eclipse run configuration. When maven does not see a pom.xml file and is asked to run some non-standard target if fails like this as it don't know anything about the plugin that defines the target.
The solution is to correct the base directory to wherever your pom.xml file resides.
if you following this tutorial:
http://tapestry.apache.org/creating-the-skeleton-application.html
don't forget to follow this one crucial instruction:
Change into the newly created directory, and execute the command: