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I am building a project using optaplanner jar to solve a vehicle routing problem. After building the jar, I am unable to invoke the main class and this is the error I get:

513 [main] INFO org.kie.api.internal.utils.ServiceDiscoveryImpl - Loading kie.conf from  jar:file:/Users/meena/Documents/SourceCode/Comma_code/comma_code/sources/target/comma-1.0-SNAPSHOT-jar-with-dependencies.jar!/META-INF/kie.conf in classloader sun.misc.Launcher$AppClassLoader@55f96302

515 [main] INFO org.kie.api.internal.utils.ServiceDiscoveryImpl - Adding Service +org.optaplanner.core.impl.solver.kie.KieSolverAssemblerService



Exception in thread "main" java.lang.ExceptionInInitializerError

at org.kie.api.internal.utils.ServiceRegistry.getInstance(ServiceRegistry.java:27)

at org.kie.api.KieServices$Factory$LazyHolder.<clinit>(KieServices.java:332)

at org.kie.api.KieServices$Factory.get(KieServices.java:339)

at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildDroolsScoreDirectorFactory(ScoreDirectorFactoryConfig.java:499)

at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildScoreDirectorFactory(ScoreDirectorFactoryConfig.java:350)

at org.optaplanner.core.config.solver.SolverConfig.buildSolver(SolverConfig.java:255)

at org.optaplanner.core.impl.solver.AbstractSolverFactory.buildSolver(AbstractSolverFactory.java:61)

at com.abc.planner.app.UavRoutingApp.<init>(UavRoutingApp.java:57)

at com.abc.planner.app.UavRoutingApp.main(UavRoutingApp.java:110)

Caused by: java.lang.RuntimeException: Child     services [org.kie.api.internal.assembler.KieAssemblers] have no parent

at org.kie.api.internal.utils.ServiceDiscoveryImpl.buildMap(ServiceDiscoveryImpl.java:180)

at org.kie.api.internal.utils.ServiceDiscoveryImpl.getServices(ServiceDiscoveryImpl.java:97)

at org.kie.api.internal.utils.ServiceRegistryImpl.<init>(ServiceRegistryImpl.java:36)

at org.kie.api.internal.utils.ServiceRegistryImpl$LazyHolder.<clinit>(ServiceRegistryImpl.java:32)

... 9 more

I have looked into Stackoverflow questions but was unable to find a solution that resolved it.

Here is a copy of my POM file.

<?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">

<modelVersion>4.0.0</modelVersion>



<groupId>com.abc</groupId>

<artifactId>proj_xyz</artifactId>

<version>1.0-SNAPSHOT</version>

<packaging>jar</packaging>



<name>comma</name>

<url>http://www.barnstormresearch.com</url>



<!-- see https://www.optaplanner.org/download/download.html for planner version and mvn dependency

-->

<dependencies>

    <dependency>

        <groupId>junit</groupId>

        <artifactId>junit</artifactId>

        <version>4.11</version>

        <scope>test</scope>

    </dependency>

    <dependency>

        <groupId>org.optaplanner</groupId>

        <artifactId>optaplanner-core</artifactId>

        <version>7.13.0.Final</version>

    </dependency>

    <!--dependency>

        <groupId>org.optaplanner</groupId>

        <artifactId>optaplanner-persistence-common</artifactId>

        <version>7.13.0.Final</version>

    </dependency-->

    <dependency><!-- Most examples use the XStream integration -->

        <groupId>org.optaplanner</groupId>

        <artifactId>optaplanner-persistence-xstream</artifactId>

        <version>7.13.0.Final</version>

    </dependency>

    <!--dependency>

        <groupId>org.optaplanner</groupId>

        <artifactId>optaplanner-benchmark</artifactId>

        <version>7.13.0.Final</version>

    </dependency-->

    <!--dependency>

        <groupId>org.kie</groupId>

        <artifactId>kie-api</artifactId>

        <version>7.12.0.Final</version>

    </dependency>

    <dependency>

        <groupId>org.drools</groupId>

        <artifactId>drools-decisiontables</artifactId>

        <version>7.12.0.Final</version>

        <scope>runtime</scope>

    </dependency-->

    <dependency>

        <groupId>commons-io</groupId>

        <artifactId>commons-io</artifactId>

        <version>2.6</version>

    </dependency>

    <dependency>

        <groupId>com.google.guava</groupId>

        <artifactId>guava</artifactId>

        <version>20.0</version>

    </dependency>

    <!-- Logging -->

    <dependency>

        <groupId>org.slf4j</groupId>

        <artifactId>slf4j-api</artifactId>

        <version>1.7.25</version>

    </dependency>

    <dependency>

        <groupId>org.slf4j</groupId>

        <artifactId>slf4j-simple</artifactId>

        <version>1.6.4</version>

    </dependency>

</dependencies>



<build>

    <resources>

        <resource>

            <directory>src/main/resources</directory>

            <includes>

                <include>**/*</include>

            </includes>

        </resource>

    </resources>

    <sourceDirectory>src/main/java</sourceDirectory>



    <plugins>

        <plugin>

            <artifactId>maven-clean-plugin</artifactId>

            <version>3.0.0</version>

        </plugin>

        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->

        <plugin>

            <artifactId>maven-resources-plugin</artifactId>

            <version>3.0.2</version>

        </plugin>

        <plugin>

            <artifactId>maven-compiler-plugin</artifactId>

            <version>3.7.0</version>

            <!-- set the java version -->

            <configuration>

                <source>1.8</source>

                <target>1.8</target>

            </configuration>

        </plugin>

        <plugin>

            <artifactId>maven-surefire-plugin</artifactId>

            <version>2.20.1</version>

        </plugin>

        <!--plugin>

            <artifactId>maven-jar-plugin</artifactId>

            <version>3.0.2</version>

        </plugin-->

        <plugin>

            <artifactId>maven-install-plugin</artifactId>

            <version>2.5.2</version>

        </plugin>

        <plugin>

            <artifactId>maven-deploy-plugin</artifactId>

            <version>2.8.2</version>

        </plugin>

        <plugin>

            <groupId>org.apache.maven.plugins</groupId>

            <artifactId>maven-assembly-plugin</artifactId>

            <version>3.1.0</version>

            <configuration>

                <archive>

                    <manifest>

                        <addClasspath>true</addClasspath>

                        <mainClass>

                            com.abc.planner.app.UavRoutingApp

                        </mainClass>

                    </manifest>

                </archive>

                <descriptorRefs>

                    <descriptorRef>jar-with-dependencies</descriptorRef>

                </descriptorRefs>

            </configuration>

            <executions>

                <execution>

                    <id>make-assembly</id>

                    <phase>package</phase>

                    <goals>

                        <goal>single</goal>

                    </goals>

                </execution>

            </executions>

        </plugin>

    </plugins>

</build>

It is executing from the IDE. I have extracted the jar files and found only 1 META_INF/kie.conf

Any ideas are really appreciated.

Thanks

It looks like a drools and Uber-jar(or fat-jar or one-jar) issue. I found this on the drools documentation site:

https://docs.jboss.org/drools/release/7.14.0.Final/drools-docs/html_single/index.html#_building_and_running_drools_in_a_fat_jar

This is a much simpler fix than some of the others suggested.

I made the change suggested here and used the maven shade plugin to build a single jar and it works now. I am pasting my sample pom file for other users who will run into this issue:

Add this to the maven-shade-plugin section:

<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">

    <resource>META-INF/kie.conf</resource>

</transformer>

My final pom.xml

<plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-shade-plugin</artifactId>

                <version>3.2.0</version>

                <executions>

                    <!-- Run shade goal on package phase -->

                    <execution>

                        <phase>package</phase>

                        <goals>

                            <goal>shade</goal>

                        </goals>

                        <configuration>

                            <transformers>

                                <!-- add Main-Class to manifest file -->

                                <transformer

                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">

                                    <mainClass>com.abc.planner.app.UavRoutingApp</mainClass>



                                    <!-- -Dlog4j.configurationFile=../properties/idStrikeSolver-log4j.properties -Duser.timezone="UTC" -->

                                </transformer>

                                <transformer

                                        implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">

                                    <resource>META-INF/kie.conf</resource>

                                </transformer>

                            </transformers>

                        </configuration>

                    </execution>

                </executions>

            </plugin>

Hope this helps others too! Thanks for your help Geoffrey.

Drools and jar-with-dependencies aren't compatible AFAIK.

Workarounds:

• A different score calculation easy java (too slow), incremental java (too painfull), constraintstreams (coming soon).


• Don't use jar-with-dependencies