無法加載方言org.drools.compiler.rule.builder.dialect.mvel.MVELDialectConfiguration

Question

我在我的java項目中使用Drools。這裏是

<?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/maven-v4_0_0.xsd"> 
<modelVersion>4.0.0</modelVersion> 

<groupId>com.myproject.java</groupId> 
<artifactId>PriceAnalyzer</artifactId> 
<version>1</version> 

<dependencies> 
    <dependency> 
     <groupId>org.drools</groupId> 
     <artifactId>knowledge-api</artifactId> 
     <version>${drools.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.drools</groupId> 
     <artifactId>drools-core</artifactId> 
     <version>${drools.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.drools</groupId> 
     <artifactId>drools-compiler</artifactId> 
     <version>${drools.version}</version> 
    </dependency> 
</dependencies> 
<properties> 
    <drools.version>6.2.0.Final</drools.version> 
    <jbpm.version>6.2.0.Final</jbpm.version> 
</properties> 

該項目被添加到另一個項目爲如下一個Maven依賴pom.xml中。

<dependency> 
     <groupId>com.myproject.java</groupId> 
     <artifactId>PriceAnalyzer</artifactId> 
     <version>1</version> 
     <scope>compile</scope> 
</dependency> 

一切工作正常在本地服務器。但是當我在生產服務器上部署它時，會產生以下異常。

java.lang.RuntimeException: Unable to load dialect 'org.drools.rule.builder.dialect.mvel.MVELDialectConfiguration:mvel:org.drools.rule.builder.dialect.mvel.MVELDialectConfiguration' 
    at org.drools.compiler.builder.impl.KnowledgeBuilderConfigurationImpl.addDialect(KnowledgeBuilderConfigurationImpl.java:375) 
    at org.drools.compiler.builder.impl.KnowledgeBuilderConfigurationImpl.buildDialectConfigurationMap(KnowledgeBuilderConfigurationImpl.java:361) 
    at org.drools.compiler.builder.impl.KnowledgeBuilderConfigurationImpl.init(KnowledgeBuilderConfigurationImpl.java:233) 
    at org.drools.compiler.builder.impl.KnowledgeBuilderConfigurationImpl.init(KnowledgeBuilderConfigurationImpl.java:193) 
    at org.drools.compiler.builder.impl.KnowledgeBuilderConfigurationImpl.<init>(KnowledgeBuilderConfigurationImpl.java:183) 
    at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.<init>(KnowledgeBuilderImpl.java:265) 
    at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.<init>(KnowledgeBuilderImpl.java:196) 
    at org.drools.compiler.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFactoryServiceImpl.java:39) 
    at org.kie.internal.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46) 
    at com.codegen.rm.MarkupCalculation.createKnowledgeBaseFromSpreadsheet(MarkupCalculation.java:44) 
    at com.codegen.rm.MarkupCalculation.runAlgorithm(MarkupCalculation.java:23) 
    at it.codegen.rnd.rm.service.ChartCalculationService.getMarkupChartData(ChartCalculationService.java:668) 
    at it.codegen.rnd.rm.controller.ChartController.sendMarkupChartData(ChartController.java:260) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) 
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) 
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:817) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:731) 
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968) 
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:870) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:844) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at it.codegen.rnd.rm.config.CORSFilter.doFilter(CORSFilter.java:31) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:745) 
Caused by: java.lang.ClassCastException: org.drools.rule.builder.dialect.mvel.MVELDialectConfiguration cannot be cast to org.drools.compiler.compiler.DialectConfiguration 
    at org.drools.compiler.builder.impl.KnowledgeBuilderConfigurationImpl.addDialect(KnowledgeBuilderConfigurationImpl.java:370) 
    ... 48 more 

有什麼建議嗎？

Answer 1

我有同樣的錯誤。問題是共享tomcat庫文件夾（/ usr/share/tomcat7/lib）中有另一個版本的drools-compiler。從那裏刪除.jar後，錯誤消失。

我希望能幫到你。