Maven2: Missing artifact but jars are in place

From now to then, my Maven 2 started to mess around.

I am using SPring STS 2.6.1 and have a single project based on Spring 3, Hibernate, DWR, Cometd and all that stuff.

Today I just updated from Git und all of a sudden, I got that scary mvn exclamation mark (!) next to my project.

After hitting "Project -> Maven -> Update dependencies" I just receive:

24.05.11 15:26:58 MESZ: Missing artifact org.jdom:jdom:jar:1.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-common:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-core:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-solrj:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact stax:stax:jar:1.2.0:compile
24.05.11 15:26:58 MESZ: Missing artifact stax:stax-api:jar:1.0.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-lucene-analyzers:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-lucene-core:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-lucene-highlighter:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-lucene-queries:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-lucene-snowball:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-lucene-spellchecker:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-httpclient:commons-httpclient:jar:3.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.commons:commons-io:jar:1.3.2:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-logging:commons-logging:jar:1.0.4:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.solr:solr-commons-csv:jar:1.3.0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.geronimo.specs:geronimo-stax-api_1.0_spec:jar:1.0.1:compile
24.05.11 15:26:58 MESZ: Missing artifact net.java.dev.stax-utils:stax-utils:jar:20040917:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.lucene:lucene-snowball:jar:2.4.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.lucene:lucene-core:jar:2.4.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.slf4j:slf4j-api:jar:1.6.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-expression:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-core:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-beans:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-aop:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact aopalliance:aopalliance:jar:1.0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-asm:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-aspects:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-test:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-context:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-context-support:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-tx:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-jdbc:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-orm:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-oxm:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-web:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-webmvc:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework:spring-instrument:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework.security:spring-security-core:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework.security:spring-security-web:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework.security:spring-security-taglibs:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework.security:spring-security-acl:jar:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework.security:spring-security-parent:pom:3.0.5.RELEASE:compile
24.05.11 15:26:58 MESZ: Missing artifact org.springframework.security:spring-security-config:jar:3.0.5.RELEASE:system
24.05.11 15:26:58 MESZ: Missing artifact org.hibernate:hibernate-core:jar:3.3.2.GA:compile
24.05.11 15:26:58 MESZ: Missing artifact antlr:antlr:jar:2.7.6:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-collections:commons-collections:jar:3.1:compile
24.05.11 15:26:58 MESZ: Missing artifact dom4j:dom4j:jar:1.6.1:compile
24.05.11 15:26:58 MESZ: Missing artifact javax.transaction:jta:jar:1.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.hibernate:hibernate-annotations:jar:3.4.0.GA:compile
24.05.11 15:26:58 MESZ: Missing artifact org.hibernate:ejb3-persistence:jar:1.0.2.GA:compile
24.05.11 15:26:58 MESZ: Missing artifact org.hibernate:hibernate-commons-annotations:jar:3.1.0.GA:compile
24.05.11 15:26:58 MESZ: Missing artifact org.hibernate:ejb3-persistence:pom:1.0.2.GA:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-dbcp:commons-dbcp:jar:1.4:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-pool:commons-pool:jar:1.5.4:compile
24.05.11 15:26:58 MESZ: Missing artifact org.aspectj:aspectjweaver:jar:1.6.10:compile
24.05.11 15:26:58 MESZ: Missing artifact org.slf4j:slf4j-log4j12:jar:1.6.1:compile
24.05.11 15:26:58 MESZ: Missing artifact log4j:log4j:jar:1.2.16:compile
24.05.11 15:26:58 MESZ: Missing artifact javax.persistence:persistence-api:jar:1.0:compile
24.05.11 15:26:58 MESZ: Missing artifact javassist:javassist:jar:3.12.1.GA:compile
24.05.11 15:26:58 MESZ: Missing artifact postgresql:postgresql:jar:9.0-801.jdbc4:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-codec:commons-codec:jar:1.4:compile
24.05.11 15:26:58 MESZ: Missing artifact org.directwebremoting:dwr:jar:2.0.3:compile
24.05.11 15:26:58 MESZ: Missing artifact org.beanshell:bsh:jar:2.0b4:compile
24.05.11 15:26:58 MESZ: Missing artifact org.jasypt:jasypt:jar:1.7:compile
24.05.11 15:26:58 MESZ: Missing artifact cglib:cglib:jar:2.2:compile
24.05.11 15:26:58 MESZ: Missing artifact asm:asm:jar:3.1:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-fileupload:commons-fileupload:jar:1.2.2:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.poi:poi:jar:3.8-beta1:compile
24.05.11 15:26:58 MESZ: Missing artifact jasperreports:jasperreports:jar:3.5.3:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-beanutils:commons-beanutils:jar:1.8.0:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-digester:commons-digester:jar:1.7:compile
24.05.11 15:26:58 MESZ: Missing artifact jfree:jcommon:jar:1.0.15:compile
24.05.11 15:26:58 MESZ: Missing artifact jfree:jfreechart:jar:1.0.12:compile
24.05.11 15:26:58 MESZ: Missing artifact xml-apis:xml-apis:jar:1.3.02:compile
24.05.11 15:26:58 MESZ: Missing artifact eclipse:jdtcore:jar:3.1.0:compile
24.05.11 15:26:58 MESZ: Missing artifact junit:junit:jar:4.8.2:test
24.05.11 15:26:58 MESZ: Missing artifact org.easymock:easymock:jar:3.0:test
24.05.11 15:26:58 MESZ: Missing artifact cglib:cglib-nodep:jar:2.2:test
24.05.11 15:26:58 MESZ: Missing artifact org.objenesis:objenesis:jar:1.2:test
24.05.11 15:26:58 MESZ: Missing artifact net.sf.ehcache:ehcache:pom:2.3.1:compile
24.05.11 15:26:58 MESZ: Missing artifact net.sf.ehcache:ehcache-core:jar:2.3.1:compile
24.05.11 15:26:58 MESZ: Missing artifact net.sf.ehcache:ehcache-terracotta:jar:2.3.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.opensymphony.quartz:quartz-all:jar:1.6.1:compile
24.05.11 15:26:58 MESZ: Missing artifact javax.servlet:jstl:jar:1.1.2:compile
24.05.11 15:26:58 MESZ: Missing artifact taglibs:standard:jar:1.1.2:compile
24.05.11 15:26:58 MESZ: Missing artifact org.aspectj:aspectjrt:jar:1.6.5:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.velocity:velocity:jar:1.6.2:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-lang:commons-lang:jar:2.4:compile
24.05.11 15:26:58 MESZ: Missing artifact oro:oro:jar:2.0.8:compile
24.05.11 15:26:58 MESZ: Missing artifact javax.mail:mail:jar:1.4.1:compile
24.05.11 15:26:58 MESZ: Missing artifact javax.activation:activation:jar:1.1:compile
24.05.11 15:26:58 MESZ: Missing artifact com.lowagie:itext:jar:2.0.7:compile
24.05.11 15:26:58 MESZ: Missing artifact bouncycastle:bcmail-jdk14:jar:138:compile
24.05.11 15:26:58 MESZ: Missing artifact bouncycastle:bcprov-jdk14:jar:138:compile
24.05.11 15:26:58 MESZ: Missing artifact org.cometd.java:cometd-java-server:jar:1.0.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.cometd.java:cometd-api:jar:1.0.1:compile
24.05.11 15:26:58 MESZ: Missing artifact org.eclipse.jetty:jetty-util:jar:7.0.1.v20091125:compile
24.05.11 15:26:58 MESZ: Missing artifact org.eclipse.jetty:jetty-continuation:jar:7.0.1.v20091125:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.velocity:velocity-tools:jar:2.0:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-chain:commons-chain:jar:1.1:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-validator:commons-validator:jar:1.3.1:compile
24.05.11 15:26:58 MESZ: Missing artifact sslext:sslext:jar:1.2-0:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.struts:struts-core:jar:1.3.8:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.struts:struts-taglib:jar:1.3.8:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.struts:struts-tiles:jar:1.3.8:compile
24.05.11 15:26:58 MESZ: Missing artifact net.htmlparser.jericho:jericho-html:jar:3.1:compile
24.05.11 15:26:58 MESZ: Missing artifact ro.isdc.wro4j:wro4j-core:jar:1.3.3:compile
24.05.11 15:26:58 MESZ: Missing artifact commons-io:commons-io:jar:2.0:compile
24.05.11 15:26:58 MESZ: Missing artifact com.google.collections:google-collections:jar:1.0:compile
24.05.11 15:26:58 MESZ: Missing artifact javax.servlet:servlet-api:jar:2.5:compile
24.05.11 15:26:58 MESZ: Missing artifact redis.clients:jedis:jar:1.5.2:compile
24.05.11 15:26:58 MESZ: Missing artifact org.mongodb:mongo-java-driver:jar:2.5.2:compile
24.05.11 15:26:58 MESZ: Missing artifact org.xhtmlrenderer:core-renderer:jar:R8pre2:compile
24.05.11 15:26:58 MESZ: Missing artifact org.apache.sanselan:sanselan:jar:0.97-incubator:compile
24.05.11 15:26:58 MESZ: Missing artifact com.kenai.nbpwr:com-sun-pdfview:jar:1.0.5-201003191900:compile
24.05.11 15:26:58 MESZ: Missing artifact org.swinglabs:pdf-renderer:jar:1.0.5:compile
24.05.11 15:26:58 MESZ: Missing artifact org.safehaus.jug:jug:jar:2.0.0:system
24.05.11 15:26:58 MESZ: Missing artifact de.dankomannhaupt:JDBCAppender:jar:1.0:system
24.05.11 15:26:58 MESZ: Missing artifact spy:memcahed:jar:2.5:system
24.05.11 15:26:58 MESZ: Missing artifact net.sf.beanlib:beanlib:jar:5.0.2beta:compile
24.05.11 15:26:58 MESZ: Missing artifact xstream:xstream:jar:1.1.2:compile
24.05.11 15:26:58 MESZ: Missing artifact net.jcip:jcip-annotations:jar:1.0:compile
24.05.11 15:26:58 MESZ: Missing artifact net.sf.beanlib:beanlib-hibernate:jar:5.0.2beta:compile

My pom.xml looks like:

<properties>
        <org.springframework.version>3.0.5.RELEASE</org.springframework.version>
        <hibernate.version>3.3.2.GA</hibernate.version>
    </properties>

    <repositories>
        <repository>
            <id>JBoss</id>
            <name>JBoss Repsitory</name>
            <layout>default</layout>
            <url>http://repository.jboss.org/maven2</url>
        </repository>
    </repositories>
    <!-- Bezeichnung -->
    <artifactId>project-dao</artifactId>
    <name>Vevention Dao</name>
    <groupId>com.corp.dao</groupId>
    <version>1.0Beta</version>

    <dependencies>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-expression</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-beans</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-aop</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-aspects</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context-support</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-tx</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-orm</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-oxm</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-web</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>${org.springframework.version}</version>
        </dependency>
        <dependency> 
            <groupId>org.springframework</groupId>
            <artifactId>spring-instrument</artifactId>
            <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>${org.springframework.version}</version>
         </dependency>
         <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>${org.springframework.version}</version>
         </dependency>
         <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-taglibs</artifactId>
            <version>${org.springframework.version}</version>
         </dependency>
        <dependency> 
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>${org.springframework.version}</version>
            <scope>system</scope> 
            <systemPath>${basedir}/lib/spring-security-config-3.0.5.RELEASE.jar</systemPath> 
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>         

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernate.version}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-annotations</artifactId>
            <version>3.4.0.GA</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>ejb3-persistence</artifactId>
            <version>1.0.2.GA</version>
            <type>pom</type>
        </dependency>
<dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.6.1</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>jdom</groupId>
            <artifactId>jdom</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.4</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-search</artifactId>
            <version>3.1.0.GA</version>
        </dependency>
        <dependency>
            <groupId>org.apache.solr</groupId>
            <artifactId>solr-common</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.solr</groupId>
            <artifactId>solr-core</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.lucene</groupId>
            <artifactId>lucene-snowball</artifactId>
            <version>2.4.1</version>
        </dependency>
        <dependency>
            <groupId>javax.transaction</groupId>
            <artifactId>jta</artifactId>
            <version>1.0.1B</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>2.5.6.SEC01</version>
        </dependency>
        <dependency>
            <groupId>memcached</groupId>
            <artifactId>memcached</artifactId>
            <version>2.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.6.5</version>
        </dependency>
         <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>1.5.2</version>
        </dependency>       

        <dependency>
            <groupId>voldemort</groupId>
            <artifactId>voldemort</artifactId>
            <version>0.81</version>
        </dependency>

    </dependencies>
</project>

I then checked on my Mac /Users/XYZ/.m2 and all jar files are in place as expected.

I am using the current Maven release shipped with STS. I also enabled debug output but there was nothing suspicious.

There are a few other options apart from Project->Clean, some of which are more along the lines of turning it off and on again.

• Try right-clicking on the project and selecting Maven->Update Project Configuration.
• Disable then re-enable dependency management (right-click Maven->Disable Dependency Management then Maven->Enable Dependency Management
• Close the project and reopen it.
• Check that your Maven settings are configured correctly. If you are behind a proxy you'll need to configure the proxy settings in the global or user settings.
• Check you're using the Maven installation you expect. By default m2eclipse uses the embedder, if you have a separate installation you may want to configure m2eclipse to use the external installation so that CLI and Eclipse builds are consistent. This also ensures you're configured to connect through any proxy as above.