Building scripted Jenkins pipeline, error while packaging using Maven

Question

I'm relatively new to DevOps in General as well as Java. Which makes debugging Maven and Jenkins all the more difficult for me.

I am trying to create a scripted Jenkins pipeline for a Java project from the internet using the following script:

pipeline{
    agent any
    tools{
        maven 'MAVEN_JENKINS'
    }
    stages{
        stage("checkout from github"){
            steps{
                git branch: 'master',
                url:'https://github.com/redbilledpanda/DevOpsClassCodes.git'
                echo 'pulled from github successfully'
            }
        }
        stage("compile the code to executable format"){
            steps{
                sh "mvn compile"
                echo 'converted the code from human readable to machine readable '
            }
        }
        stage("testing the code"){
            steps{
                sh "mvn test"
                echo 'run and execute the test cases written in selenium'
            }
        }
        stage("code review to check quality of code"){
            steps{
                sh "mvn pmd:pmd"
                echo 'code review done'
            }
        }
        stage("convert the code to package"){
            steps{
                sh "mvn clean package"
                echo 'convert the files to war file'
            }
        }
    }
}

The only section that fails is the packaging stage. Here is the entire log:

+ mvn package
[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for com.edurekademo.tutorial:addressbook:war:2.0
[WARNING] Reporting configuration should be done in <reporting> section, not in maven-site-plugin <configuration> as reportPlugins parameter. @ line 298, column 40
[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] 
[INFO] 
[INFO] ----------------< com.edurekademo.tutorial:addressbook >----------------
[INFO] Building Vaadin Addressbook example 2.0
[INFO] --------------------------------[ war ]---------------------------------
[INFO] 
[INFO] --- maven-enforcer-plugin:1.0:enforce (enforce-versions) @ addressbook ---
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ addressbook ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /var/lib/jenkins/workspace/scriptedpipeline/src/main/resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.2:compile (default-compile) @ addressbook ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ addressbook ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.2:testCompile (default-testCompile) @ addressbook ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-surefire-plugin:2.19.1:test (default-test) @ addressbook ---

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running com.edurekademo.utilities.TestLogger
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/var/lib/jenkins/.m2/repository/org/slf4j/slf4j-simple/1.7.7/slf4j-simple-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/var/lib/jenkins/.m2/repository/org/slf4j/slf4j-log4j12/1.7.7/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.SimpleLoggerFactory]
[pool-1-thread-2] INFO com.edurekademo.utilities.TestLogger - java.lang.ArithmeticException: / by zero
Cause:at com.edurekademo.utilities.TestLogger.testGetErrorMessage2(TestLogger.java:30)
Cause:at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[pool-1-thread-1] INFO com.edurekademo.utilities.TestLogger - java.lang.ArithmeticException: / by zero
Cause:at com.edurekademo.utilities.TestLogger.testGetErrorMessage1(TestLogger.java:14)
Cause:at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[pool-1-thread-4] INFO com.edurekademo.utilities.TestLogger - java.io.IOException: TESTIOEXCEPTION
Cause:at com.edurekademo.utilities.ExceptionThrower.doNothing(ExceptionThrower.java:18)
Cause:at com.edurekademo.utilities.TestLogger.testGetErrorMessage4(TestLogger.java:60)
[pool-1-thread-3] INFO com.edurekademo.utilities.TestLogger - java.lang.ArithmeticException: / by zero
Cause:at com.edurekademo.utilities.ExceptionThrower.getCounter(ExceptionThrower.java:13)
Cause:at com.edurekademo.utilities.TestLogger.testGetErrorMessage3(TestLogger.java:45)
[pool-1-thread-5] ERROR com.edurekademo.utilities.ExceptionThrower - java.lang.Exception: DEAR
Cause:at com.edurekademo.utilities.ExceptionThrower.doYYY(ExceptionThrower.java:35)
Cause:at com.edurekademo.utilities.ExceptionThrower.doXXX(ExceptionThrower.java:23)
[pool-1-thread-5] INFO com.edurekademo.utilities.TestLogger - java.lang.Exception: TEST MESSAGE
Cause:at com.edurekademo.utilities.ExceptionThrower.doCheck(ExceptionThrower.java:43)
Cause:at com.edurekademo.utilities.TestLogger.testGetErrorMessage5(TestLogger.java:75)
***** java.lang.Exception: TEST MESSAGE
Cause:at com.edurekademo.utilities.ExceptionThrower.doCheck(ExceptionThrower.java:43)
Cause:at com.edurekademo.utilities.TestLogger.testGetErrorMessage5(TestLogger.java:75)
Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.031 sec - in com.edurekademo.utilities.TestLogger
Running com.edurekademo.utilities.TestHexAsciiConversion
74657374696e6720617363696920636f6e76657274696f6e20696e746f2068657861646563696d616c
testing ascii convertion into hexadecimal
Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.026 sec - in com.edurekademo.utilities.TestHexAsciiConversion
Running com.edurekademo.utilities.TestGenericComparator
Tests run: 14, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.016 sec - in com.edurekademo.utilities.TestGenericComparator

Results :

Tests run: 23, Failures: 0, Errors: 0, Skipped: 0

[INFO] 
[INFO] --- maven-war-plugin:2.2:war (default-war) @ addressbook ---
[WARNING] Error injecting: org.apache.maven.plugin.war.WarMojo
com.google.inject.ProvisionException: Unable to provision, see the following errors:

1) Error injecting constructor, java.lang.ExceptionInInitializerError: Cannot access defaults field of Properties
  at org.apache.maven.plugin.war.WarMojo.<init>(Unknown Source)
  while locating org.apache.maven.plugin.war.WarMojo

1 error
    at com.google.inject.internal.InternalProvisionException.toProvisionException (InternalProvisionException.java:226)
    at com.google.inject.internal.InjectorImpl$1.get (InjectorImpl.java:1053)
    at com.google.inject.internal.InjectorImpl.getInstance (InjectorImpl.java:1086)
    at org.eclipse.sisu.space.AbstractDeferredClass.get (AbstractDeferredClass.java:48)
    at com.google.inject.internal.ProviderInternalFactory.provision (ProviderInternalFactory.java:85)
    at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision (InternalFactoryToInitializableAdapter.java:57)
    at com.google.inject.internal.ProviderInternalFactory$1.call (ProviderInternalFactory.java:66)
    at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision (ProvisionListenerStackCallback.java:112)
    at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision (ProvisionListenerStackCallback.java:127)
    at com.google.inject.internal.ProvisionListenerStackCallback.provision (ProvisionListenerStackCallback.java:66)
    at com.google.inject.internal.ProviderInternalFactory.circularGet (ProviderInternalFactory.java:61)
    at com.google.inject.internal.InternalFactoryToInitializableAdapter.get (InternalFactoryToInitializableAdapter.java:47)
    at com.google.inject.internal.InjectorImpl$1.get (InjectorImpl.java:1050)
    at org.eclipse.sisu.inject.Guice4$1.get (Guice4.java:162)
    at org.eclipse.sisu.inject.LazyBeanEntry.getValue (LazyBeanEntry.java:81)
    at org.eclipse.sisu.plexus.LazyPlexusBean.getValue (LazyPlexusBean.java:51)
    at org.codehaus.plexus.DefaultPlexusContainer.lookup (DefaultPlexusContainer.java:263)
    at org.codehaus.plexus.DefaultPlexusContainer.lookup (DefaultPlexusContainer.java:255)
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo (DefaultMavenPluginManager.java:520)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:124)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:370)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:294)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:960)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:77)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:568)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: java.lang.ExceptionInInitializerError: Cannot access defaults field of Properties
    at com.thoughtworks.xstream.converters.collections.PropertiesConverter.<clinit> (PropertiesConverter.java:46)
    at com.thoughtworks.xstream.XStream.setupConverters (XStream.java:647)
    at com.thoughtworks.xstream.XStream.<init> (XStream.java:445)
    at com.thoughtworks.xstream.XStream.<init> (XStream.java:385)
    at com.thoughtworks.xstream.XStream.<init> (XStream.java:342)
    at org.apache.maven.plugin.war.util.WebappStructureSerializer.<clinit> (WebappStructureSerializer.java:47)
    at org.apache.maven.plugin.war.AbstractWarMojo.<init> (AbstractWarMojo.java:316)
    at org.apache.maven.plugin.war.WarMojo.<init> (WarMojo.java:49)
    at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0 (Native Method)
    at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance (NativeConstructorAccessorImpl.java:77)
    at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance (DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstanceWithCaller (Constructor.java:499)
    at java.lang.reflect.Constructor.newInstance (Constructor.java:480)
    at com.google.inject.internal.DefaultConstructionProxyFactory$ReflectiveProxy.newInstance (DefaultConstructionProxyFactory.java:126)
    at com.google.inject.internal.ConstructorInjector.provision (ConstructorInjector.java:114)
    at com.google.inject.internal.ConstructorInjector.access$000 (ConstructorInjector.java:32)
    at com.google.inject.internal.ConstructorInjector$1.call (ConstructorInjector.java:98)
    at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision (ProvisionListenerStackCallback.java:112)
    at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision (ProvisionListenerStackCallback.java:127)
    at com.google.inject.internal.ProvisionListenerStackCallback.provision (ProvisionListenerStackCallback.java:66)
    at com.google.inject.internal.ConstructorInjector.construct (ConstructorInjector.java:93)
    at com.google.inject.internal.ConstructorBindingImpl$Factory.get (ConstructorBindingImpl.java:306)
    at com.google.inject.internal.InjectorImpl$1.get (InjectorImpl.java:1050)
    at com.google.inject.internal.InjectorImpl.getInstance (InjectorImpl.java:1086)
    at org.eclipse.sisu.space.AbstractDeferredClass.get (AbstractDeferredClass.java:48)
    at com.google.inject.internal.ProviderInternalFactory.provision (ProviderInternalFactory.java:85)
    at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision (InternalFactoryToInitializableAdapter.java:57)
    at com.google.inject.internal.ProviderInternalFactory$1.call (ProviderInternalFactory.java:66)
    at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision (ProvisionListenerStackCallback.java:112)
    at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision (ProvisionListenerStackCallback.java:127)
    at com.google.inject.internal.ProvisionListenerStackCallback.provision (ProvisionListenerStackCallback.java:66)
    at com.google.inject.internal.ProviderInternalFactory.circularGet (ProviderInternalFactory.java:61)
    at com.google.inject.internal.InternalFactoryToInitializableAdapter.get (InternalFactoryToInitializableAdapter.java:47)
    at com.google.inject.internal.InjectorImpl$1.get (InjectorImpl.java:1050)
    at org.eclipse.sisu.inject.Guice4$1.get (Guice4.java:162)
    at org.eclipse.sisu.inject.LazyBeanEntry.getValue (LazyBeanEntry.java:81)
    at org.eclipse.sisu.plexus.LazyPlexusBean.getValue (LazyPlexusBean.java:51)
    at org.codehaus.plexus.DefaultPlexusContainer.lookup (DefaultPlexusContainer.java:263)
    at org.codehaus.plexus.DefaultPlexusContainer.lookup (DefaultPlexusContainer.java:255)
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo (DefaultMavenPluginManager.java:520)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:124)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:370)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:351)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:171)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:163)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:294)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:960)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:77)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:568)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.680 s
[INFO] Finished at: 2022-09-28T16:24:30+05:30
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project addressbook: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.2:war failed: Unable to load the mojo 'war' in the plugin 'org.apache.maven.plugins:maven-war-plugin:2.2' due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: Cannot access defaults field of Properties
[ERROR] -----------------------------------------------------
[ERROR] realm =    plugin>org.apache.maven.plugins:maven-war-plugin:2.2
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/var/lib/jenkins/.m2/repository/org/apache/maven/plugins/maven-war-plugin/2.2/maven-war-plugin-2.2.jar
[ERROR] urls[1] = file:/var/lib/jenkins/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.6/maven-reporting-api-2.0.6.jar
[ERROR] urls[2] = file:/var/lib/jenkins/.m2/repository/org/apache/maven/doxia/doxia-sink-api/1.0-alpha-7/doxia-sink-api-1.0-alpha-7.jar
[ERROR] urls[3] = file:/var/lib/jenkins/.m2/repository/commons-cli/commons-cli/1.0/commons-cli-1.0.jar
[ERROR] urls[4] = file:/var/lib/jenkins/.m2/repository/org/codehaus/plexus/plexus-interactivity-api/1.0-alpha-4/plexus-interactivity-api-1.0-alpha-4.jar
[ERROR] urls[5] = file:/var/lib/jenkins/.m2/repository/org/apache/maven/maven-archiver/2.5/maven-archiver-2.5.jar
[ERROR] urls[6] = file:/var/lib/jenkins/.m2/repository/org/codehaus/plexus/plexus-io/2.0.2/plexus-io-2.0.2.jar
[ERROR] urls[7] = file:/var/lib/jenkins/.m2/repository/org/codehaus/plexus/plexus-archiver/2.1/plexus-archiver-2.1.jar
[ERROR] urls[8] = file:/var/lib/jenkins/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.15/plexus-interpolation-1.15.jar
[ERROR] urls[9] = file:/var/lib/jenkins/.m2/repository/junit/junit/3.8.1/junit-3.8.1.jar
[ERROR] urls[10] = file:/var/lib/jenkins/.m2/repository/com/thoughtworks/xstream/xstream/1.3.1/xstream-1.3.1.jar
[ERROR] urls[11] = file:/var/lib/jenkins/.m2/repository/xpp3/xpp3_min/1.1.4c/xpp3_min-1.1.4c.jar
[ERROR] urls[12] = file:/var/lib/jenkins/.m2/repository/org/codehaus/plexus/plexus-utils/3.0/plexus-utils-3.0.jar
[ERROR] urls[13] = file:/var/lib/jenkins/.m2/repository/org/apache/maven/shared/maven-filtering/1.0-beta-2/maven-filtering-1.0-beta-2.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]
[ERROR] 
[ERROR] -----------------------------------------------------
[ERROR] 
[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

The POM file for the project is here. What exactly is going wrong?

Answer 1

In complement to previous answer :

• Add maven-compiler-plugin and maven-war-plugin declaration to the plugin section in your POM (with latest version). Also explicitly declare the Java version to the maven-compiler-plugin '' section.
• Specify explicitly in your pipeline the Java version used :

pipeline {
    agent any
    tools {
        git 'YOUR_GIT_INSTALLATION'
        jdk 'YOUR_JDK_VERSION'
        maven 'MAVEN_JENKINS'
    }
...

}

where 'YOUR_GIT_INSTALLATION' and 'YOUR_JDK_VERSION' are the one declared in your tool configuration (it is also a good practice to declare explicitly the GIT version and any tools you're using in the pipeline)

Answer 2

I see 3 things that might cause this:

1. In your pom, your current compiler is quit old, 3.2:

       <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.2</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
   

Try upgrading this to latest, 3.10.

2. I dont see maven-war-plugin in your pom. Try adding it with latest version as well.

3. Note: Merely setting the target option in the configuration tag does not guarantee that your code actually runs on a JRE with the specified version.

Try adding this to ensure you are actually compiling using the same version

<project>
  [...]
  <properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
  [...]
</project>

Answer 3

Update your pom.xml to include maven-compiler-plugin with maven-war-plugin latest version. Also, check your java version in the Jenkins project configuration.

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-war-plugin</artifactId>
    <version>3.3.2</version>
</plugin>
<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.10.1</version>
    <configuration>
        <source>1.8</source>
        <target>1.8</target>
    </configuration>
</plugin>