[英]Optaplanner - NullPointerException when creating jar file
My program works fine from my IDE (IntelliJ) but for some reason, when I try to create a jar file I get following error when I run the program from a terminal:我的程序在我的 IDE (IntelliJ) 上运行良好,但由于某种原因,当我尝试创建一个 jar 文件时,当我从终端运行程序时出现以下错误:
Exception in thread "main" java.lang.NullPointerException at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildDroolsScoreDirectorFactory(ScoreDirectorFactoryConfig.java:461)
org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildDroolsScoreDirectorFactory(ScoreDirectorFactoryConfig.java:461) 处的线程“main”java.lang.NullPointerException 中的异常
org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildScoreDirectorFactory(ScoreDirectorFactoryConfig.java:331)
org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildScoreDirectorFactory(ScoreDirectorFactoryConfig.java:331)
org.optaplanner.core.config.solver.SolverConfig.buildSolver(SolverConfig.java:220)
org.optaplanner.core.config.solver.SolverConfig.buildSolver(SolverConfig.java:220)
org.optaplanner.core.impl.solver.AbstractSolverFactory.buildSolver(AbstractSolverFactory.java:57)
org.optaplanner.core.impl.solver.AbstractSolverFactory.buildSolver(AbstractSolverFactory.java:57)
org.optaplanner.EmployeeRoster.main(EmployeeRoster.java:31)
org.optaplanner.EmployeeRoster.main(EmployeeRoster.java:31)
This is my line 31 in EmployeeRoster:这是我在 EmployeeRoster 中的第 31 行:
Solver solver = SolverFactory.createFromXmlResource(SOLVER_CONFIG_XML).buildSolver();
SOLVER_CONFIG_XML is a String containing my path for my XML solver-config, it looks like this SOLVER_CONFIG_XML 是一个包含我的 XML 求解器配置路径的字符串,它看起来像这样
<?xml version="1.0" encoding="UTF-8"?> <solver> <solutionClass>org.optaplanner.solver.Roster</solutionClass> <entityClass>org.optaplanner.domain.Assignment</entityClass> <scoreDirectorFactory> <scoreDrl>org/optaplanner/solver/employeeShiftsScoreRules.drl</scoreDrl> </scoreDirectorFactory> <localSearch> <termination> <secondsSpentLimit>5</secondsSpentLimit> <bestScoreLimit>0hard/0medium/0soft</bestScoreLimit> </termination> <!--<termination> <unimprovedStepCountLimit>5</unimprovedStepCountLimit> </termination>--> <acceptor> <entityTabuSize>7</entityTabuSize> </acceptor> <forager> <acceptedCountLimit>1000</acceptedCountLimit> </forager> </localSearch> </solver>
Also here's my pom.xml file if that should be relevant:如果应该相关,这里还有我的 pom.xml 文件:
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.btrg.dfb</groupId>
<artifactId>optaplanner</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.optaplanner</groupId>
<artifactId>optaplanner-core</artifactId>
<version>7.3.0.Final</version>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.8</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.1</version>
</dependency>
<dependency>
<groupId>com.jolira</groupId>
<artifactId>onejar-maven-plugin</artifactId>
<version>1.4.4</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<!-- Build an executable JAR -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>org.avalin.optaplanner.EmployeeRoster</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-my-jar-with-dependencies</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>com.jolira</groupId>
<artifactId>onejar-maven-plugin</artifactId>
<version>1.4.4</version>
<executions>
<execution>
<goals>
<goal>one-jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
What might I be doing wrong?我可能做错了什么?
For me, the issue had to deal with how I wanted to run the jar ( java -jar ), and consequently how I built the jar.对我来说,这个问题必须处理我想如何运行 jar ( java -jar ),以及我如何构建 jar。 The NullPointerException arose when I upgraded to optaplanner-core/7.4.1 from 6.4.0 .
当我从6.4.0升级到optaplanner-core/7.4.1时出现 NullPointerException 。 This issue was not present back when I was still using 6.4.0.
当我还在使用 6.4.0 时,这个问题就不存在了。
Exception:例外:
java.lang.NullPointerException at org.kie.internal.io.ResourceFactory.newByteArrayResource(ResourceFactory.java:66) at org.drools.compiler.kie.builder.impl.AbstractKieModule.getResource(AbstractKieModule.java:299) at org.drools.compiler.kie.builder.impl.AbstractKieModule.addResourceToCompiler(AbstractKieModule.java:264) at org.drools.compiler.kie.builder.impl.AbstractKieModule.addResourceToCompiler(AbstractKieModule.java:259) at org.drools.compiler.kie.builder.impl.AbstractKieProject.buildKnowledgePackages(AbstractKieProject.java:243) at org.drools.compiler.kie.builder.impl.AbstractKieProject.verify(AbstractKieProject.java:74) at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildKieProject(KieBuilderImpl.java:250) at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:218) at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:176) at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildDroolsScoreDi
java.lang.NullPointerException at org.kie.internal.io.ResourceFactory.newByteArrayResource(ResourceFactory.java:66) at org.drools.compiler.kie.builder.impl.AbstractKieModule.getResource(AbstractKieModule.java:299) at org. drools.compiler.kie.builder.impl.AbstractKieModule.addResourceToCompiler(AbstractKieModule.java:264) at org.drools.compiler.kie.builder.impl.AbstractKieModule.addResourceToCompiler(AbstractKieModule.java:259) at org.drools kie.builder.impl.AbstractKieProject.buildKnowledgePackages(AbstractKieProject.java:243) 在 org.drools.compiler.kie.builder.impl.AbstractKieProject.verify(AbstractKieProject.java:74) 在 org.drools.compiler.kie.builder。 impl.KieBuilderImpl.buildKieProject(KieBuilderImpl.java:250) 在 org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:218) 在 org.drools.compiler.kie.builder.impl.KieBuilderImpl。 buildAll(KieBuilderImpl.java:176) 在 org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildDroolsScoreDi rectorFactory(ScoreDirectorFactoryConfig.java:503)
rectorFactory(ScoreDirectorFactoryConfig.java:503)
The following is a temporary workaround I did to resolve the NullPointerException and just get the application to run.以下是我为解决 NullPointerException 并让应用程序运行而执行的临时解决方法。
dependencies {
...
compile group: 'org.optaplanner', name: 'optaplanner-core', version:'7.4.1.Final'
compile group: 'org.optaplanner', name: 'optaplanner-benchmark', version:'7.4.1.Final'
...
}
task fatJar(type: Jar) {
manifest {
attributes 'Implementation-Title': 'Self contained jar with all dependencies',
'Implementation-Version': version,
'Main-Class': 'path.to.class.with.main.method'
}
baseName = 'fatJar'
from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
with jar
}
unzip fatJar.jar -d unzippedJar/
The "fatJar" task flattened the dependencies - duplicate file names are allowed in the jar. “fatJar”任务扁平化了依赖关系——jar 中允许重复的文件名。 This resulted in four unzippedJar/META-INF/kie.conf files, only one of which was used.
这导致了四个解压缩的 Jar/META-INF/kie.conf文件,其中只有一个被使用。 Regardless of whichever kie.conf file was used, this was my final kie.conf.
无论使用哪个 kie.conf 文件,这都是我最后的 kie.conf。
org.kie.api.internal.assembler.KieAssemblers = +org.optaplanner.core.impl.solver.kie.KieSolverAssemblerService
org.kie.api.internal.assembler.KieAssemblers = org.kie.internal.services.KieAssemblersImpl
org.kie.api.internal.runtime.KieRuntimes = org.kie.internal.services.KieRuntimesImpl
org.kie.api.internal.weaver.KieWeavers = org.kie.internal.services.KieWeaversImpl
org.kie.api.internal.runtime.beliefs.KieBeliefs = org.kie.internal.services.KieBeliefsImpl
org.kie.api.io.KieResources = org.drools.core.io.impl.ResourceFactoryServiceImpl
org.kie.api.marshalling.KieMarshallers = org.drools.core.marshalling.impl.MarshallerProviderImpl
org.kie.api.concurrent.KieExecutors = org.drools.core.concurrent.ExecutorProviderImpl
org.kie.api.KieServices = org.drools.compiler.kie.builder.impl.KieServicesImpl
org.kie.internal.builder.KnowledgeBuilderFactoryService = org.drools.compiler.builder.impl.KnowledgeBuilderFactoryServiceImpl
For whatever reason, specifying the MANIFEST.MF file did nothing for me, hence I left it out.无论出于何种原因,指定 MANIFEST.MF 文件对我没有任何帮助,因此我将其排除在外。
jar cf rejard.jar .
java -cp rejard.jar path.to.class.with.main.method
Following @Arturo W's answer, I can suggest another fix using maven's assembly plugin to make a fat jar.按照@Arturo W 的回答,我可以建议使用maven 的程序集插件制作一个胖罐子的另一个修复程序。
As stated in the documentation :如文档中所述:
"If two or more elements (eg, file, fileSet) select different sources for the same file for archiving, only one of the source files will be archived. [...] The order of the phases is as follows: 1) FileItem 2) FileSets 3) ModuleSet 4) DependencySet and 5) Repository elements."
“如果两个或多个元素(例如,file、fileSet)为同一文件选择不同的源进行归档,则只会归档其中一个源文件。[...] 阶段的顺序如下:1) FileItem 2) 文件集 3) 模块集 4) 依赖集和 5) 存储库元素。”
META-INF/kie.conf
is provided in org.optaplanner.core
's archive, hence maven packages optaplanner's version over the custom one define in your repository. META-INF/kie.conf
在org.optaplanner.core
的存档中提供,因此 maven 将 optaplanner 的版本封装在存储库中定义的自定义版本之上。
To include it, we exclude all META-INF/kie.conf
files during unpackaging and manually copy our version using the <file></file>
option in a custom descriptor file.为了包含它,我们在解包过程中排除了所有
META-INF/kie.conf
文件,并使用自定义描述符文件中的<file></file>
选项手动复制我们的版本。
Here's how we do it:这是我们如何做到的:
<?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/xsd/maven-4.0.0.xsd">
<!-- ... -->
<build>
<plugins>
<!-- ... -->
<!-- fat jar -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<descriptors>
<descriptor>src/assembly/distribution.xml</descriptor>
</descriptors>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>com.veryseriouscompany.veryseriousproject.app.Main</mainClass>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<id>assemble-all</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<!-- ... -->
To fix the inclusion of kie.conf
, we'll have to write a custom descriptor, defined in src/assembly/distribution.xml
.要修复包含
kie.conf
,我们必须编写一个自定义描述符,在src/assembly/distribution.xml
定义。 We start from a predefined descriptor: jar-with-dependencies .我们从一个预定义的描述符开始: jar-with-dependencies 。 That's a good starting point.
这是一个很好的起点。
<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.0.0 http://maven.apache.org/xsd/assembly-2.0.0.xsd">
<id>epigno-jar-with-dependencies</id>
<formats>
<format>jar</format>
</formats>
<includeBaseDirectory>false</includeBaseDirectory>
<dependencySets>
<dependencySet>
<outputDirectory>/</outputDirectory>
<useProjectArtifact>true</useProjectArtifact>
<unpack>true</unpack>
<scope>runtime</scope>
<!-- Exclude all META-INF/kie.conf during unpacking -->
<unpackOptions>
<excludes>
<exclude>META-INF/kie.conf</exclude>
</excludes>
</unpackOptions>
</dependencySet>
</dependencySets>
<files>
<file>
<!-- Manually copy your custom kie configuration file from your repository. -->
<!-- Please replace this path by whatever path is relevant for your project. -->
<source>src/main/resources/META-INF/kie.conf</source>
<outputDirectory>META-INF</outputDirectory>
</file>
</files>
</assembly>
When you are finished, run完成后,运行
mvn package
Hopefully, this will package the correct kie.conf
in your fat jar!希望这会将正确的
kie.conf
到您的胖 jar 中!
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