mvn package fails with Required Artifact Missing even though it exists in my Remote Repository

Question

I'm trying to run mvn clean package on my Maven project and it fails with the message:

"required artifact is missing" for the artifact net.ezswitch:ResourcesComponent:jar:0.0.14

I've configured my settings.xml to include my Remote Repository and if I navigate, on my browser, I can actually find this Jar in my repository, but Maven can't, somehow.

I've checked that the Maven version that I'm running is the one for which the settings.xml file that I've edited takes effect, because if I disable the Profile that I configured there, Maven fails with a different message.

I'm using Maven 2.2.1 on MAC OS X Lion.

Here's my settings.xml:

<localRepository>/Users/hordine/.m2/repository</localRepository>
<servers>
  <server>
      <id>LiquixRepository</id>
      <username>henrique</username>
      <password>xxxxx</password>
      <configuration>
          <httpConfiguration>
              <put>
                  <params>
                      <param>
                          <name>http.authentication.preemptive</name>
                          <value>%b,true</value>
                      </param>
                  </params>
              </put>
          </httpConfiguration>      
      </configuration>
  </server>

  <server>
      <id>dev.liquix.eu</id>
      <username>henrique</username>
      <password>xxxxx</password>
  </server>
  <server>
      <id>ezpay-dev.liquix.eu</id>
      <username>henrique</username>
      <password>xxxxx</password>
  </server>
</servers>
<profiles>
  <profile>
      <id>ezswitch</id>

      <properties>
          <tomcat.home>/System/Library/tomcat</tomcat.home>
          <subversion.user>henrique</subversion.user>
          <subversion.password>xxxxx</subversion.password>
      </properties>

      <activation>
          <jdk>1.6</jdk>
      </activation>

      <repositories>
          <repository>
              <id>central</id>
              <name>EzSwitch Cache</name>
              <layout>default</layout>
              <url>http://ezpay-dev.liquix.eu:9998/repository</url>
          </repository>
          <repository>
            <id>central_maven1</id>
            <name>EzSwitch Cache2</name>
            <layout>legacy</layout>
            <url>http://ezpay-dev.liquix.eu:9998/repository</url>
          </repository>
      </repositories>


      <pluginRepositories>
          <pluginRepository>
              <id>central</id>
              <name>EZswitch</name>
              <url>http://ezpay-dev.liquix.eu:9998/repository</url>
              <snapshots>
              </snapshots>
              <releases>
              </releases>
          </pluginRepository>
      </pluginRepositories>

  </profile>
</profiles>
<activeProfiles>
    <activeProfile>ezswitch</activeProfile>
</activeProfiles>

And the entire error message that I get is:

[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Missing:
----------
1) net.ezswitch:ResourcesComponent:jar:0.0.14

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=net.ezswitch -DartifactId=ResourcesComponent -Dversion=0.0.14 -Dpackaging=jar -Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file there: 
      mvn deploy:deploy-file -DgroupId=net.ezswitch -DartifactId=ResourcesComponent -Dversion=0.0.14 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency: 
    1) eu.liquix:RegistrationSolution:war:0.4.60-SNAPSHOT
    2) net.ezswitch:ResourcesComponent:jar:0.0.14

----------
1 required artifact is missing.

for artifact: 
  eu.liquix:RegistrationSolution:war:0.4.60-SNAPSHOT

from the specified remote repositories:
  central (http://ezpay-dev.liquix.eu:9998/repository),
  central_maven1 (http://ezpay-dev.liquix.eu:9998/repository)


    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:711)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
    at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
    at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
    at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
    at org.codehaus.classworlds.Launcher.main(Launcher.java:375)

But if I navigate, via my browser, to that Location, I can see the Artifact at the following location:

http://ezpay-dev.liquix.eu:9998/repository/net/ezswitch/ResourcesComponent/0.0.14/ResourcesComponent-0.0.14.jar

I'd be grateful for any help. Thanks in advance.

Henrique Ordine

Solution 1

Apparently error message "required artifact is missing" was hiding the actual root cause, which was not visible in the message(s). Running Maven with debug messages on (-X option) will print out additional information that gives more detailed insight as to what would be the problem.

For future reference, this time the error was

[WARNING] Unable to get resource 'net.ezswitch:ResourcesComponent:pom:0.0.14' from repository central (ezpay-dev.liquix.eu:9998/repository):
Specified destination directory cannot be created: /Users/hordine/.m2/repository/net/ezswitch/ResourcesComponent/0.0.14

Which wasn't visible without the debug flag.

Solution 2

If you haven't already, could you please try:

mvn -U clean package

In addition updating all snapshot versions, in case they have been newly deployed to the repository since Maven's once a day snapshot check, this will also force Maven to update its other cached repo resolutions, such as 404's.

Solution 3

Just had this problem. Went through so many solutions on my Mac. In the end changed my

~/.m2/settings.xml

changed this:

 <localRepository>${USER.HOME}/.m2/repository</localRepository>

to this:

 <localRepository>${env.HOME}/.m2/repository</localRepository>

you can see all the properties you have to play with on a mac by typing in a terminal

 export

Comments

[chad]

The missing artifact is a release version not a snapshot. Isn't the -U only for snapshot checking?

[Chris Beach]

-U does refresh -SNAPSHOTS, but not just -SNAPSHOTs. Maven caches resolution failures to avoid hammering servers. The -U forces it to retry a failed download.

[Henrique Ordine]

@Chris Beach Thanks for your effort. I tried that, but it still fails with a Missing Artifact error.