有人可以帮我理解为什么我会出现以下错误吗？
我正在尝试使用 Drools 6.5.0 动态构建业务规则。下面是我的java代码：
String KIE_GROUP_ID = "rules_test";
String KIE_ARTIFACT_ID = "rules_test";
String KIE_POM_VERSION = "1.0";
String propertyName = "myProperty";
String K_SESSION = "_kSession";
String drlFile = compiler.compile(rulesAsParameters, Files.newInputStream(Paths.get(ruleFileTemplatePath)));
KieBaseModel kieBase = kieModuleModel.newKieBaseModel(propertyName)
.setDefault( false )
.setEqualsBehavior( EqualityBehaviorOption.EQUALITY )
.setEventProcessingMode( EventProcessingOption.STREAM );
kieBase.newKieSessionModel(propertyName.concat(K_SESSION) )
.setDefault( false )
.setType( KieSessionModel.KieSessionType.STATEFUL )
.setClockType( ClockTypeOption.get("realtime") );
kfs.write(String.format(KFS_VIRTUAL_RULE_FILE_PATH, propertyName), drlFile);
kfs.writeKModuleXML(kieModuleModel.toXML());
final ReleaseId releaseId = services.newReleaseId(KIE_GROUP_ID, KIE_ARTIFACT_ID, KIE_POM_VERSION);
kfs.generateAndWritePomXML(releaseId);
KieBuilder kieBuilder = services.newKieBuilder(kfs);
kieBuilder.buildAll();
kieContainer = services.newKieContainer(releaseId);
container.getKieBase(propertyName).newKieSession().insert(myRequestObject).fireAllRules();
功能运行良好，规则构建成功，我能够触发规则并获得正确的结果。但我在日志中不断看到以下错误：
2019-01-10 01:23:49.793 [WARN ] [main] MavenSettings - Environment variable M2_HOME is not set
2019-01-10 01:23:49.820 [DEBUG] [main] MavenEmbedderUtils - Not in OSGi: using plexus based maven parser
2019-01-10 01:23:50.229 [ERROR] [main] MavenEmbedder - Unable to build MavenEmbedder
org.codehaus.plexus.component.repository.exception.ComponentLookupException: java.util.NoSuchElementException
role: org.apache.maven.execution.MavenExecutionRequestPopulator
roleHint:
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:267) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:255) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:249) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.PlexusComponentProvider.lookup(PlexusComponentProvider.java:42) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenEmbedder.buildMavenExecutionRequest(MavenEmbedder.java:133) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenEmbedder.<init>(MavenEmbedder.java:95) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenEmbedder.<init>(MavenEmbedder.java:86) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenEmbedder.<init>(MavenEmbedder.java:80) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenProjectLoader.newMavenEmbedder(MavenProjectLoader.java:77) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenProjectLoader.parseMavenPom(MavenProjectLoader.java:61) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenProjectLoader.parseMavenPom(MavenProjectLoader.java:55) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.MavenPomModelGenerator.parse(MavenPomModelGenerator.java:33) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kproject.xml.PomModel$Parser.parse(PomModel.java:110) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildPomModel(KieBuilderImpl.java:471) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.getPomModel(KieBuilderImpl.java:448) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.init(KieBuilderImpl.java:134) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:169) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.fz.rules.engine.DroolsRuleCache.buildKieBases(DroolsRuleCache.java:95) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.fz.rules.engine.DroolsRuleCache.<init>(DroolsRuleCache.java:63) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.fz.rules.engine.DroolsRuleCacheFactory.initialize(DroolsRuleCacheFactory.java:24) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.psi.fz.listener.BootStrapListener.contextInitialized(BootStrapListener.java:40) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.ApplicationListeners.contextInitialized(ApplicationListeners.java:187) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:217) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:186) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:251) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.epay.appserver.EpayAppServer.<init>(EpayAppServer.java:126) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.epay.appserver.EpayAppServer.main(EpayAppServer.java:68) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
Caused by: java.util.NoSuchElementException
at org.eclipse.sisu.inject.LocatedBeans$Itr.next(LocatedBeans.java:141) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.eclipse.sisu.inject.LocatedBeans$Itr.next(LocatedBeans.java:1) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:76) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:1) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:263) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
... 28 more
2019-01-10 01:23:50.231 [ERROR] [main] KieScanner - Unable to create new MavenEmbedder
org.kie.scanner.embedder.MavenEmbedderException: java.util.NoSuchElementException
role: org.apache.maven.execution.MavenExecutionRequestPopulator
roleHint:
at org.kie.scanner.embedder.MavenEmbedder.<init>(MavenEmbedder.java:107) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenEmbedder.<init>(MavenEmbedder.java:86) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenEmbedder.<init>(MavenEmbedder.java:80) ~[fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenProjectLoader.newMavenEmbedder(MavenProjectLoader.java:77) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenProjectLoader.parseMavenPom(MavenProjectLoader.java:61) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.embedder.MavenProjectLoader.parseMavenPom(MavenProjectLoader.java:55) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.kie.scanner.MavenPomModelGenerator.parse(MavenPomModelGenerator.java:33) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kproject.xml.PomModel$Parser.parse(PomModel.java:110) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildPomModel(KieBuilderImpl.java:471) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.getPomModel(KieBuilderImpl.java:448) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.init(KieBuilderImpl.java:134) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:169) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.fz.rules.engine.DroolsRuleCache.buildKieBases(DroolsRuleCache.java:95) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.fz.rules.engine.DroolsRuleCache.<init>(DroolsRuleCache.java:63) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.fz.rules.engine.DroolsRuleCacheFactory.initialize(DroolsRuleCacheFactory.java:24) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.psi.fz.listener.BootStrapListener.contextInitialized(BootStrapListener.java:40) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.ApplicationListeners.contextInitialized(ApplicationListeners.java:187) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:217) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:186) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:251) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.epay.appserver.EpayAppServer.<init>(EpayAppServer.java:126) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
at com.oath.epay.appserver.EpayAppServer.main(EpayAppServer.java:68) [fraudwebservice-4.4.1-SNAPSHOT-shaded.jar:?]
Caused by: org.codehaus.plexus.component.repository.exception.ComponentLookupException: java.util.NoSuchElementException
role: org.apache.maven.execution.MavenExecutionRequestPopulator
错误被抛出：kieBuilder.buildAll()。