SEVERE: Error creating solver factory for solver SolverInstance{containerId='cloudbalance', solverId='cloudsolver', solverConfigFile='cloudbalance-solver.xml', status=NOT_SOLVING, scoreWrapper=null} java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445) at java.util.HashMap$EntryIterator.next(HashMap.java:1479) at java.util.HashMap$EntryIterator.next(HashMap.java:1477) at java.util.AbstractMap.hashCode(AbstractMap.java:530) at java.util.Arrays.hashCode(Arrays.java:4146) at java.util.Objects.hash(Objects.java:128) at org.drools.modelcompiler.constraints.LambdaAccumulator.hashCode(LambdaAccumulator.java:52) at org.drools.modelcompiler.constraints.LambdaAccumulator$BindingAcc.hashCode(LambdaAccumulator.java:175) at org.drools.core.rule.SingleAccumulate.hashCode(SingleAccumulate.java:188) at org.drools.core.reteoo.AccumulateNode.(AccumulateNode.java:101) at org.drools.core.reteoo.builder.PhreakNodeFactory.buildAccumulateNode(PhreakNodeFactory.java:133) at org.drools.core.reteoo.builder.AccumulateBuilder.build(AccumulateBuilder.java:104) at org.drools.core.reteoo.builder.PatternBuilder.attachPattern(PatternBuilder.java:123) at org.drools.core.reteoo.builder.PatternBuilder.build(PatternBuilder.java:84) at org.drools.core.reteoo.builder.GroupElementBuilder$AndBuilder.build(GroupElementBuilder.java:108) at org.drools.core.reteoo.builder.GroupElementBuilder.build(GroupElementBuilder.java:68) at org.drools.core.reteoo.builder.ReteooRuleBuilder.addSubRule(ReteooRuleBuilder.java:167) at org.drools.core.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.java:139) at org.drools.core.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:110) at org.drools.core.impl.KnowledgeBaseImpl.internalAddRule(KnowledgeBaseImpl.java:1525) at org.drools.core.impl.KnowledgeBaseImpl.internalAddPackages(KnowledgeBaseImpl.java:926) at org.drools.core.impl.KnowledgeBaseImpl.lambda$addPackages$2(KnowledgeBaseImpl.java:728) at org.drools.core.impl.KnowledgeBaseImpl.enqueueModification(KnowledgeBaseImpl.java:745) at org.drools.core.impl.KnowledgeBaseImpl.addPackages(KnowledgeBaseImpl.java:728) at org.drools.modelcompiler.builder.KieBaseBuilder.createKieBase(KieBaseBuilder.java:55) at org.drools.modelcompiler.CanonicalKieModule.createKieBase(CanonicalKieModule.java:177) at org.drools.compiler.kie.builder.impl.KieContainerImpl.createKieBase(KieContainerImpl.java:407) at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieBase(KieContainerImpl.java:397) at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirectorFactory.(DroolsScoreDirectorFactory.java:94) at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildDroolsScoreDirectorFactory(ScoreDirectorFactoryConfig.java:623) at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildScoreDirectorFactory(ScoreDirectorFactoryConfig.java:464) at org.optaplanner.core.config.solver.SolverConfig.buildScoreDirectorFactory(SolverConfig.java:606) at org.optaplanner.core.config.solver.SolverConfig.buildSolver(SolverConfig.java:514) at org.optaplanner.core.impl.solver.DefaultSolverFactory.buildSolver(DefaultSolverFactory.java:49) at org.kie.server.services.optaplanner.SolverServiceBase.createSolver(SolverServiceBase.java:100) at org.kie.server.remote.rest.optaplanner.SolverResource.createSolver(SolverResource.java:118) at sun.reflect.GeneratedMethodAccessor68.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140) at org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:509) at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:399) at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$0(ResourceMethodInvoker.java:363) at org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358) at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:365) at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:337) at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:310) at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:443) at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:233) at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:139) at org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358) at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:142) at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:219) at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:227) at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56) at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.kie.server.services.impl.security.web.CaptureHttpRequestFilter.doFilter(CaptureHttpRequestFilter.java:42) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:607) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) at org.kie.integration.tomcat.JACCValve.invoke(JACCValve.java:113) at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:240) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:853) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1587) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)