我收到这个 maven clean 错误，错误org.apache.maven.plugins：
maven-clean-plugin:2.4.1:clean 无法删除 C:\Users\Hobbs\git\heroku\reservosity\target\tomcat.8080\work\Tomcat\localhost_\WEB-INF\lib\mysql-connector-java -5.1.20.jar
不知道为什么会这样。任何帮助，将不胜感激。
日志：
Apache Maven 3.0.4 (r1232337; 2012-01-17 08:44:56+0000)
Maven home: C:\Users\Hobbs\git\heroku\reservosity\EMBEDDED
Java version: 1.7.0_04, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jre7
Default locale: en_IE, platform encoding: Cp1252
OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[INFO] Error stacktraces are turned on.
[DEBUG] Reading global settings from EMBEDDED\conf\settings.xml
[DEBUG] Reading user settings from C:\Users\Hobbs\.m2\settings.xml
[DEBUG] Using local repository at C:\Users\Hobbs\.m2\repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for C:\Users\Hobbs\.m2\repository
[INFO] Scanning for projects...
[DEBUG] Extension realms for project com.example:Reservosity:war:0.0.1-SNAPSHOT: (none)
[DEBUG] Looking up lifecyle mappings for packaging war from ClassRealm[plexus.core, parent: null]
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.example:Reservosity:war:0.0.1-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 232, column 12
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[DEBUG] === REACTOR BUILD PLAN ================================================
[DEBUG] Project: com.example:Reservosity:war:0.0.1-SNAPSHOT
[DEBUG] Tasks: [clean]
[DEBUG] Style: Regular
[DEBUG] =======================================================================
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Reservosity 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]
[DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]
[DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]
[DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]
[DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]
[DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]
[DEBUG] === PROJECT BUILD PLAN ================================================
[DEBUG] Project: com.example:Reservosity:0.0.1-SNAPSHOT
[DEBUG] Dependencies (collect): []
[DEBUG] Dependencies (resolve): []
[DEBUG] Repositories (dependencies): [central (http://repo.maven.apache.org/maven2, releases)]
[DEBUG] Repositories (plugins) : [central (http://repo.maven.apache.org/maven2, releases)]
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal: org.apache.maven.plugins:maven-clean-plugin:2.4.1:clean (default-clean)
[DEBUG] Style: Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
<directory default-value="${project.build.directory}"/>
<excludeDefaultDirectories default-value="false">${clean.excludeDefaultDirectories} </excludeDefaultDirectories>
<failOnError default-value="true">${maven.clean.failOnError}</failOnError>
<followSymLinks default-value="false">${clean.followSymLinks}</followSymLinks>
<outputDirectory default-value="${project.build.outputDirectory}"/>
<reportDirectory default-value="${project.reporting.outputDirectory}"/>
<skip default-value="false">${clean.skip}</skip>
<testOutputDirectory default-value="${project.build.testOutputDirectory}"/>
<verbose>${clean.verbose}</verbose>
</configuration>
[DEBUG] =======================================================================
[INFO]
[INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ Reservosity ---
[DEBUG] Created new class realm maven.api
[DEBUG] Importing foreign packages into class realm maven.api
[DEBUG] Imported: org.apache.maven.wagon.events < plexus.core
[DEBUG] Imported: org.sonatype.aether.transfer < plexus.core
[DEBUG] Imported: org.apache.maven.exception < plexus.core
[DEBUG] Imported: org.sonatype.aether.metadata < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.Xpp3Dom < plexus.core
[DEBUG] Imported: org.sonatype.aether.collection < plexus.core
[DEBUG] Imported: org.sonatype.aether.version < plexus.core
[DEBUG] Imported: org.apache.maven.monitor < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.repository < plexus.core
[DEBUG] Imported: org.apache.maven.repository < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.resource < plexus.core
[DEBUG] Imported: org.codehaus.plexus.logging < plexus.core
[DEBUG] Imported: org.apache.maven.profiles < plexus.core
[DEBUG] Imported: org.sonatype.aether.repository < plexus.core
[DEBUG] Imported: org.apache.maven.classrealm < plexus.core
[DEBUG] Imported: org.apache.maven.execution < plexus.core
[DEBUG] Imported: org.sonatype.aether.artifact < plexus.core
[DEBUG] Imported: org.sonatype.aether.spi < plexus.core
[DEBUG] Imported: org.apache.maven.reporting < plexus.core
[DEBUG] Imported: org.apache.maven.usability < plexus.core
[DEBUG] Imported: org.codehaus.plexus.container < plexus.core
[DEBUG] Imported: org.codehaus.plexus.component < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlSerializer < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.authentication < plexus.core
[DEBUG] Imported: org.apache.maven.lifecycle < plexus.core
[DEBUG] Imported: org.codehaus.plexus.classworlds < plexus.core
[DEBUG] Imported: org.sonatype.aether.graph < plexus.core
[DEBUG] Imported: org.sonatype.aether.* < plexus.core
[DEBUG] Imported: org.apache.maven.settings < plexus.core
[DEBUG] Imported: org.codehaus.classworlds < plexus.core
[DEBUG] Imported: org.sonatype.aether.impl < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.* < plexus.core
[DEBUG] Imported: org.apache.maven.toolchain < plexus.core
[DEBUG] Imported: org.sonatype.aether.deployment < plexus.core
DEBUG] Imported: org.apache.maven.wagon.observers < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlPullParserException < plexus.core
[DEBUG] Imported: org.codehaus.plexus.util.xml.pull.XmlPullParser < plexus.core
[DEBUG] Imported: org.apache.maven.configuration < plexus.core
[DEBUG] Imported: org.apache.maven.cli < plexus.core
[DEBUG] Imported: org.sonatype.aether.installation < plexus.core
[DEBUG] Imported: org.codehaus.plexus.context < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.authorization < plexus.core
[DEBUG] Imported: org.apache.maven.project < plexus.core
[DEBUG] Imported: org.apache.maven.rtinfo < plexus.core
[DEBUG] Imported: org.codehaus.plexus.lifecycle < plexus.core
[DEBUG] Imported: org.codehaus.plexus.configuration < plexus.core
[DEBUG] Imported: org.apache.maven.artifact < plexus.core
[DEBUG] Imported: org.apache.maven.model < plexus.core
[DEBUG] Imported: org.apache.maven.* < plexus.core
[DEBUG] Imported: org.apache.maven.wagon.proxy < plexus.core
[DEBUG] Imported: org.sonatype.aether.resolution < plexus.core
[DEBUG] Imported: org.apache.maven.plugin < plexus.core
[DEBUG] Imported: org.codehaus.plexus.* < plexus.core
[DEBUG] Imported: org.codehaus.plexus.personality < plexus.core
[DEBUG] Populating class realm maven.api
[DEBUG] org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1:
[DEBUG] org.apache.maven:maven-plugin-api:jar:2.0.6:compile
[DEBUG] org.codehaus.plexus:plexus-utils:jar:2.0.5:compile
[DEBUG] Created new class realm plugin>org.apache.maven.plugins:maven-clean-plugin:2.4.1
[DEBUG] Importing foreign packages into class realm plugin>org.apache.maven.plugins:maven-clean-plugin:2.4.1
[DEBUG] Imported: < maven.api
[DEBUG] Populating class realm plugin>org.apache.maven.plugins:maven-clean-plugin:2.4.1
[DEBUG] Included: org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1
[DEBUG] Included: org.codehaus.plexus:plexus-utils:jar:2.0.5
[DEBUG] Excluded: org.apache.maven:maven-plugin-api:jar:2.0.6
[DEBUG] Configuring mojo org.apache.maven.plugins:maven-clean-plugin:2.4.1:clean from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-clean-plugin:2.4.1, parent: sun.misc.Launcher$AppClassLoader@2d8ed284]
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-clean-plugin:2.4.1:clean' with basic configurator -->
[DEBUG] (f) directory = C:\Users\Hobbs\git\heroku\reservosity\target
[DEBUG] (f) excludeDefaultDirectories = false
[DEBUG] (f) failOnError = true
[DEBUG] (f) followSymLinks = false
[DEBUG] (f) outputDirectory = C:\Users\Hobbs\git\heroku\reservosity\target\classes
[DEBUG] (f) reportDirectory = C:\Users\Hobbs\git\heroku\reservosity\target\site
[DEBUG] (f) skip = false
[DEBUG] (f) testOutputDirectory = C:\Users\Hobbs\git\heroku\reservosity\target\test-classes
[DEBUG] -- end configuration --
[INFO] Deleting C:\Users\Hobbs\git\heroku\reservosity\target
[INFO] Deleting file C:\Users\Hobbs\git\heroku\reservosity\target\tomcat.8080\work\Tomcat\localhost\_\WEB-INF\lib\mysql-connector-java-5.1.20.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.408s
[INFO] Finished at: Thu Feb 28 21:21:27 GMT 2013
[INFO] Final Memory: 4M/121M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-clean- plugin:2.4.1:clean (default-clean) on project Reservosity:
Failed to clean project: Failed to delete C:\Users\Hobbs\git\heroku\reservosity\target\tomcat.8080\work\Tomcat\localhost
\_\WEB-INF\lib\mysql-connector-java-5.1.20.jar -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal
org.apache.maven.plugins:maven-clean-plugin:2.4.1:clean (default-clean) on project
Reservosity: Failed to clean project: Failed to delete C:\Users\Hobbs\git\heroku \reservosity\target\tomcat.8080\work\Tomcat\localhost\_\WEB-INF\lib\mysql-connector- java-5.1.20.jar
POM.xml：
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>Reservosity</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<properties>
<org.springframework.version>3.1.1.RELEASE</org.springframework.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>2.2.8</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.20</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>com.github.jsimone</groupId>
<artifactId>webapp-runner</artifactId>
<version>7.0.27.1</version>
<scope>provided</scope>
</dependency>
<!-- Tiles dependency -->
<dependency>
<groupId>org.apache.tiles</groupId>
<artifactId>tiles-core</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.apache.tiles</groupId>
<artifactId>tiles-jsp</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.apache.tiles</groupId>
<artifactId>tiles-api</artifactId>
<version>2.2.1</version>
</dependency>
<dependency>
<groupId>org.apache.tiles</groupId>
<artifactId>tiles-servlet</artifactId>
<version>3.0.1</version>
</dependency>
<dependency>
<groupId>org.apache.tiles</groupId>
<artifactId>tiles-template</artifactId>
<version>3.0.1</version>
</dependency>
<!-- Security -->
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-core</artifactId>
<version>3.1.3.RELEASE</version>
<exclusions>
<exclusion>
<artifactId>spring-asm</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>3.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>3.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.1.9.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.3.1.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>4.1.9.Final</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.1</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.11</version>
</dependency>
<!-- Junit API -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.9.5</version>
</dependency>
<!-- JavaMail API -->
<dependency>
<groupId>javamail</groupId>
<artifactId>javamail</artifactId>
<version>1.3.3</version>
</dependency>
<!-- Java Activation -->
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
<!-- JavaMail extension -->
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4.6-rc1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.1</version>
</dependency>
<!-- slf4j-bridge for commons-logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.1</version>
</dependency>
<!-- The newrelic-agent.jar dependency. -->
<dependency>
<groupId>com.newrelic.agent.java</groupId>
<artifactId>newrelic-agent</artifactId>
<version>2.12.0</version>
<scope>provided</scope>
</dependency>
<!-- The newrelic-api.jar dependency. -->
<dependency>
<groupId>com.newrelic.agent.java</groupId>
<artifactId>newrelic-api</artifactId>
<version>2.12.0</version>
<scope>compile</scope>
</dependency>
<!-- The newrelic-java.zip dependency. -->
<dependency>
<groupId>com.newrelic.agent.java</groupId>
<artifactId>newrelic-java</artifactId>
<version>2.12.0</version>
<scope>provided</scope>
<type>zip</type>
</dependency>
<dependency>
<groupId>aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.5.4</version>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<id>unpack-zip</id>
<phase>package</phase>
<goals>
<goal>unpack-dependencies</goal>
</goals>
<configuration>
<artifactItems>
<artifactItem>
<groupId>com.newrelic.agent.java</groupId>
<artifactId>newrelic-java</artifactId>
<version>theVersion</version>
<type>zip</type>
<overWrite>true</overWrite>
<outputDirectory>target</outputDirectory>
<destFileName>newrelic</destFileName>
</artifactItem>
</artifactItems>
<outputDirectory>/newrelic</outputDirectory>
</configuration>
</execution>
<execution>
<phase>package</phase>
<goals>
<goal>copy</goal>
</goals>
<configuration>
<artifactItems>
<artifactItem>
<groupId>com.github.jsimone</groupId>
<artifactId>webapp-runner</artifactId>
<version>7.0.27.1</version>
<destFileName>webapp-runner.jar</destFileName>
</artifactItem>
</artifactItems>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>