问题
I am using Maven 3.0.5 and Spring Tool Source 3.2 with Maven plugin installed. When I try to do \'Run As---> Maven install\', I am getting the following error :
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Spring Social Twitter4J Sample 1.0.0
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for org.apache.maven.plugins:maven-compiler-plugin:jar:2.3.2 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for org.apache.maven.plugins:maven-war-plugin:jar:2.1.1 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for org.apache.maven.plugins:maven-install-plugin:jar:2.3.1 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO]
[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ spring-social-twitter4j ---
[debug] execute contextualize
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 15 resources
[INFO]
[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ spring-social-twitter4j ---
[WARNING] The POM for org.apache.maven.plugins:maven-compiler-plugin:jar:2.3.2 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
Jun 21, 2013 2:14:32 AM org.sonatype.guice.bean.reflect.Logs$JULSink warn
WARNING: Error injecting: org.apache.maven.plugin.CompilerMojo
**java.lang.NoClassDefFoundError: org/codehaus/plexus/compiler/CompilerException**
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
at java.lang.Class.getDeclaredConstructors(Unknown Source)
at com.google.inject.spi.InjectionPoint.forConstructorOf(InjectionPoint.java:245)
at com.google.inject.internal.ConstructorBindingImpl.create(ConstructorBindingImpl.java:98)
at com.google.inject.internal.InjectorImpl.createUninitializedBinding(InjectorImpl.java:629)
at com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:831)
at com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(InjectorImpl.java:758)
at com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.java:255)
at com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java:204)
at com.google.inject.internal.InjectorImpl.getProviderOrThrow(InjectorImpl.java:954)
at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:987)
at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:950)
at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1000)
at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:45)
at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:84)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:52)
at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100)
at org.sonatype.guice.plexus.lifecycles.PlexusLifecycleManager.onProvision(PlexusLifecycleManager.java:138)
at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:108)
at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55)
at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68)
at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45)
at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:965)
at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1011)
at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:961)
at com.google.inject.Scopes$1$1.get(Scopes.java:59)
at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:83)
at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:49)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:253)
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:245)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:455)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:92)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: java.lang.ClassNotFoundException: org.codehaus.plexus.compiler.CompilerException
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230)
... 54 more
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.749s
[INFO] Finished at: Fri Jun 21 02:14:32 IST 2013
[INFO] Final Memory: 4M/15M
[INFO] ------------------------------------------------------------------------
**[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project spring-social-twitter4j: Execution default-compile of goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile failed: A required class was missing while executing org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile: org/codehaus/plexus/compiler/CompilerException**
[ERROR] -----------------------------------------------------
[ERROR] realm = plugin>org.apache.maven.plugins:maven-compiler-plugin:2.3.2
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/C:/Users/SS%20Computer/.m2/repository/org/apache/maven/plugins/maven-compiler-plugin/2.3.2/maven-compiler-plugin-2.3.2.jar
[ERROR] urls[1] = file:/C:/Users/SS%20Computer/.m2/repository/org/codehaus/plexus/plexus-utils/1.1/plexus-utils-1.1.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import from realm ClassRealm[maven.api, parent: null]]
[ERROR]
[ERROR] -----------------------------------------------------: org.codehaus.plexus.compiler.CompilerException
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException
Please find below my pom.xml:
<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<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\">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework.social.samples</groupId>
<artifactId>spring-social-twitter4j</artifactId>
<name>Spring Social Twitter4J Sample</name>
<packaging>war</packaging>
<version>1.0.0</version>
<properties>
<java-version>1.6</java-version>
<org.springframework.social-version>1.1.0.BUILD-SNAPSHOT</org.springframework.social-version>
<org.springframework-version>3.2.1.RELEASE</org.springframework-version>
<org.springframework.security-version>3.1.3.RELEASE</org.springframework.security-version>
<org.slf4j-version>1.7.2</org.slf4j-version>
</properties>
<dependencies>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
<exclusions>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</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-tx</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>${org.springframework.security-version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-taglibs</artifactId>
<version>${org.springframework.security-version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>${org.springframework.security-version}</version>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-core</artifactId>
<version>${org.springframework.social-version}</version>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-web</artifactId>
<version>${org.springframework.social-version}</version>
</dependency>
<!-- Twitter4J -->
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-core</artifactId>
<version>2.2.3</version>
</dependency>
<!-- JSR 303 with Hibernate Validator -->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.1.0.Final</version>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j-version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.3.159</version>
</dependency>
<!-- @Inject -->
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<!-- CGLIB, only required and used for @Configuration usage -->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib-nodep</artifactId>
<version>2.2</version>
</dependency>
<!-- Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jstl-impl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>org.springframework.maven.release</id>
<name>Spring Maven Release Repository</name>
<url>http://maven.springframework.org/release</url>
<releases><enabled>true</enabled></releases>
<snapshots><enabled>false</enabled></snapshots>
</repository>
<!-- For testing against latest Spring snapshots -->
<repository>
<id>org.springframework.maven.snapshot</id>
<name>Spring Maven Snapshot Repository</name>
<url>http://maven.springframework.org/snapshot</url>
<releases><enabled>false</enabled></releases>
<snapshots><enabled>true</enabled></snapshots>
</repository>
<!-- For developing against latest Spring milestones -->
<repository>
<id>org.springframework.maven.milestone</id>
<name>Spring Maven Milestone Repository</name>
<url>http://maven.springframework.org/milestone</url>
<snapshots><enabled>false</enabled></snapshots>
</repository>
</repositories>
<build>
<resources>
<resource>
<directory>src/main/java</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>${java-version}</source>
<target>${java-version}</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<configuration>
<warName>spring-social-twitter4j</warName>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>tomcat-maven-plugin</artifactId>
<version>1.1</version>
</plugin>
</plugins>
</build>
</project>
During maven install my goal is war:war to make WAR of my application. Any timely help would be appreciated.
回答1:
Deleting full .m2/repository local repository solved my problem.
Or else you need to know what plugins are you using exactly with their dependencies as one of the plugin suffered a problem while downloading.
回答2:
Deleting full .m2 local repository solved my problem, too.
If you don't know where it is, the locations are:
Unix/Mac OS X – ~/.m2/repository
Windows – C:\Documents and Settings\{your-username}\.m2\repository
回答3:
I am adding more points to the solution by @Rushi Shah
mvn clean install -X helps to identify the root cause.
Some of the important phases of Maven build lifecycle are:
clean – the project is clean of all artifacts that came from previous compilations
compile – the project is compiled into /target directory of project root
install – packaged archive is copied into local maven repository (could in your user's home directory under /.m2)
test – unit tests are run
package – compiled sources are packaged into archive (JAR by default)
The 1.6 under tag refers to JDK version. We need to ensure that proper jdk version in our dev environment or change the value to 1.7 or 1.5 or whatever if the application can be supported in that JDK version.
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.0</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
We can find the complete details on Maven build lifecycle in Maven site.
回答4:
I had the same problem, check the installed jre used by Maven in your Run Configuration...
In your case, I think that the maven-compiler-plugin:jar:2.3.2 needs a jdk1.6
To do this : Run Configuration > YOUR_MAVEN_BUILD > JRE > Alternate JRE
Hope this helps.
回答5:
Sometimes it is caused due to the project points to JRE rather than JDK.So try this,
1.Right Click on project -->Build Path --> Configure Build Path -->Add Library -->JRE System Library -->Environments--> Installed JREs-->Point to java folder in c: drive (Windows) and select JDK folder and ok.
2.Remove the already present JRE from build path.
回答6:
Usually, define maven-compiler-plugin is sufficient enough. add the following to your compiler plugin definition.
<plugin>
<inherited>true</inherited>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
</plugin>
回答7:
I had this problem once, and this is how i resolved it:
.m2/repository
mvn clean verify) from the terminal at the current project location(where your project's pom.xml file exist) instead of running maven from eclipse.回答8:
Sometimes this issue comes because the java.version which you have mentioned in POM.xml is not the one installed in your machine.
<properties>
<java.version>1.7</java.version>
</properties>
Ensure you exactly mention the same version in your pom.xml as the jdk and jre version present in your machine.
回答9:
Actually, if you do not want to delete your local .m2/repository/... and you are have a downloaded copy of Maven from Apache, you can have Eclipse /STS use that external Maven and you can edit the {maven}\conf\settings.xml to point your localRepository to a new empty location.
<localRepository>C:\java\repository</localRepository>
Of course, you will have a new repository with all of the maven source downloads in addition to your previous .m2 location.
回答10:
check the property endorsed.dir tag in your pom.xml.
I also had this problem and I fixed by modifying the property.
Example:
<endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
回答11:
- Download maven compiler plugin jar from your central repositoy n try
- If it is still failing check your jdk version, it is because of your application is built on diff jdk version
回答12:
For me, restarting Eclipse got rid of this error!
回答13:
I think you have Two ways to solve this problem
01. Set Properties
- Set Java Build Path as jdk
Right click project ->Java Build Path ->Select Libraries tab ->Select JRE System Library ->Click Edit button ->Click Installed JREs-> add tick to box ->click Edit ->Click Directory->Select jdk
- Specifi which kind of jdk version you installed
Right click project ->Project Facets ->tick java and select java version->Apply ->Ok
- Update project
Right-click on "project"->Go to Maven->Update
02.Delete .m2 file
If you can't solve your problem using above two topic get this action Close your project. Delete your full .m2 folder
How to fined .m2 file(windows)
Go to Local Disk(C) ->Users ->Select your PC name ->.m2 file
回答14:
Java 9 incompatible
I got this error when trying to calling mvn install on a project.
I had installed Java 9 on macOS as well as Java 8 Update 144. My Maven project was apparently invoking Java 9 and failing. Removed Java 9 from my Mac, leaving just Java 8 in place. Maven is now happily building my project to successful completion.
Using Apache Maven 3.5.0 on macOS Sierra.
回答15:
Maybe you can add this dependency to your pom.xml. I use this method and solve the problem！
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.3.2</version>
</dependency>
回答16:
for the new users on Mac os , find out .m2 folder and delete it, its on your /Users/.m2 directory.
you wont get to see .m2 folder in finder(File Explorer), for this user this command to Show Mac hidden files
$ defaults write com.apple.finder AppleShowAllFiles TRUE
after this press alt and click on finder-> relaunch, you can see /Users/.m2
to hide files again, simply use this $ defaults write com.apple.finder AppleShowAllFiles false
回答17:
I renamed the .m2 directory, this didn't help yet, so I installed the newest sdk/jdk and restarted eclipse. This worked.
It seems an SDK was needed and I only had installed a JRE.
Which is weird, because eclipse worked on the same machine for a different older project.
I imported a second maven project, and Run/maven install did only complete after restarting eclipse. So maybe just a restart of eclipse was necessary.
Importing yet another project, and had to do maven install twice before it worked even though I had restarted eclipse.
回答18:
It's really incredible to be oblige to erase whole .m2/repository content. I suggest to type this command (On Windows) :
mvn clean
mvn -X package > my_log_file.log
The last command enable Debug option et redirect output to a file. Open the file and search ERROR or WARNING key words. You can find this kind of expression :
DEBUG] =======================================================================
[WARNING] The POM for javax.servlet:javax.servlet-api:jar:4.0.0 is invalid, transitive dependencies (if any) will not be available: 1 problem was encountered while building the effective model for javax.servlet:javax.servlet-api:4.0.0
[FATAL] Non-parseable POM C:\Users\vifie\.m2\repository\net\java\jvnet-parent\3\jvnet-parent-3.pom: processing instruction can not have PITarget with reserved xml name (position: END_TAG seen ...</profiles>\n\n</project>\n\n<?xml ... @160:7) @ C:\Users\vifie\.m2\repository\net\java\jvnet-parent\3\jvnet-parent-3.pom, line 160, column 7
[WARNING] The POM for org.glassfish:javax.json:jar:1.0.4 is invalid, transitive dependencies (if any) will not be available: 1 problem was encountered while building the effective model for org.glassfish:javax.json:[unknown-version]
[FATAL] Non-parseable POM C:\Users\vifie\.m2\repository\net\java\jvnet-parent\3\jvnet-parent-3.pom: processing instruction can not have PITarget with reserved xml name (position: END_TAG seen ...</profiles>\n\n</project>\n\n<?xml ... @160:7) @ C:\Users\vifie\.m2\repository\net\java\jvnet-parent\3\jvnet-parent-3.pom, line 160, column 7
It's esay in this case to understand you have just to delete directory C:\Users\vifie.m2\repository\net\java\jvnet-parent\3
Relaunch compilation, packaging and so on :
mvn package
WARNING disappear just because you delete POM file corrupted at the good location and maven re download it. Normally the new POM file is better.
Often debug mode give you messages with more comprehensive details.
Why I redirect log to a file : Simply because on Windows console don't have enough buffer to store all lines and often you cannot see all lines.
回答19:
We tried everything listed so far and it still failed. The error also mentioned
(default-war) on project utilsJava: Error assembling WAR: webxml attribute is required
The solution that finally fixed it was adding this to POM:
<failOnMissingWebXml>false</failOnMissingWebXml>
As mentioned here Error assembling WAR - webxml attribute is required
Our POM now contains this:
<plugin>
<inherited>true</inherited>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>${maven-war-plugin.version}</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
<warName>${project.artifactId}</warName>
<attachClasses>true</attachClasses>
</configuration>
</plugin>
回答20:
Either remove the below code from the pom.xml or correct your java version to make it work.
<plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.0</version> <configuration> <source>1.6</source> <target>1.6</target> </configuration> </plugin>
回答21:
i had the same problem and besides the above posts' configurations putting
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>1.9.32</version>
<configuration>
<enableJarClasses>false</enableJarClasses>
</configuration>
<executions>
<execution>
<goals>
<goal>endpoints_get_discovery_doc</goal>
</goals>
</execution>
</executions>
</plugin>
in the plugins element in pom.xml. i think the problem was absence of execution -> goal "endpoints_get_discovery_doc" in some cases like mine, so this worked for me.
来源：https://stackoverflow.com/questions/17223536/failed-to-execute-goal-org-apache-maven-pluginsmaven-compiler-plugin2-3-2comp