Implementation of Drools over tomcat fails

Question

When you start the drools service over tomcat, the error becomes lower.

12-Jul-2017 11:16:42.203 INFO [http-nio-8090-exec-1] org.apache.catalina.core.ApplicationContext.log HTMLManager: start: Starting web application '/kie-drools-wb-7.0.0.Final-tomcat8' 12-Jul-2017 11:17:07.252 SEVERE [http-nio-8090-exec-1] org.apache.catalina.core.ApplicationContext.log FAIL - Application at context path [/kie-drools-wb-7.0.0.Final-tomcat8] could not be started org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/kie-drools-wb-7.0.0.Final-tomcat8]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1307) at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:665) at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:211) at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:136) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108) 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:198) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:595) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) Caused by: java.util.ServiceConfigurationError: Error instantiating :org.apache.deltaspike.core.api.provider.BeanManagerProvider at org.jboss.weld.util.ServiceLoader.createInstance(ServiceLoader.java:310) at org.jboss.weld.util.ServiceLoader.prepareInstance(ServiceLoader.java:246) at org.jboss.weld.util.ServiceLoader.loadService(ServiceLoader.java:214) at org.jboss.weld.util.ServiceLoader.loadServiceFile(ServiceLoader.java:182) at org.jboss.weld.util.ServiceLoader.reload(ServiceLoader.java:162) at org.jboss.weld.util.ServiceLoader.iterator(ServiceLoader.java:288) at org.jboss.weld.util.collections.ImmutableSet$BuilderImpl.addAll(ImmutableSet.java:150) at org.jboss.weld.environment.servlet.WeldServletLifecycle.createDeployment(WeldServletLifecycle.java:286) at org.jboss.weld.environment.servlet.WeldServletLifecycle.initialize(WeldServletLifecycle.java:159) at org.jboss.weld.environment.servlet.EnhancedListener.onStartup(EnhancedListener.java:61) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5196) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ... 33 more Caused by: java.lang.UnsupportedClassVersionError: javax/inject/Provider : Unsupported major.minor version 52.0 (unable to load class [javax.inject.Provider]) (unable to load class [javax.enterprise.inject.Instance]) (unable to load class [javax.enterprise.inject.spi.CDI]) at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2280) at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:811) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1254) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1119) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:270) at org.apache.deltaspike.core.util.ClassUtils.loadClassForName(ClassUtils.java:147) at org.apache.deltaspike.core.util.ClassUtils.tryToLoadClassForName(ClassUtils.java:127) at org.apache.deltaspike.core.api.provider.BeanManagerProvider.<clinit>(BeanManagerProvider.java:73) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.jboss.weld.util.ServiceLoader.createInstance(ServiceLoader.java:308) ... 44 more 

Information about my environment:

i) CentOS 7.2,

ii) jdk1.7.0_67,

iii) apache-tomcat-8.5.16,

iv) kie-drools-wb-7.0.0.Final-tomcat8.war

Change 1:

There is no Java 8 on my server

 [ root@hostname ~]# sudo find / -type f -name java -print 2>/dev/null | xargs -i echo {} -version | bash bash: line 1: /var/lib/alternatives/java: Permission denied java version "1.7.0_141" OpenJDK Runtime Environment (rhel-2.6.10.1.el7_3-x86_64 u141-b02) OpenJDK 64-Bit Server VM (build 24.141-b02, mixed mode) java version "1.7.0_141" OpenJDK Runtime Environment (rhel-2.6.10.1.el7_3-x86_64 u141-b02) OpenJDK 64-Bit Server VM (build 24.141-b02, mixed mode) java version "1.7.0_67" Java(TM) SE Runtime Environment (build 1.7.0_67-b01) Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode) java version "1.7.0_67" Java(TM) SE Runtime Environment (build 1.7.0_67-b01) Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode) java version "1.6.0_31" Java(TM) SE Runtime Environment (build 1.6.0_31-b04) Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode) java version "1.6.0_31" Java(TM) SE Runtime Environment (build 1.6.0_31-b04) Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode) 

Answer 1

You need to either:

1) modify the list of dependencies to reference only compatible JDK 1.7 libraries

2) install and run the application using JDK 1.8

The problem, as explained in the post, is that ClassLoader cannot load the asp class (j). they were compiled with Java 1.8. You may try to find older versions of the corresponding cans, but this may lead to incompatibility with your actual code. I suggest you upgrade your JDK to production to the latest 1.8 branch.

By the way, JDK 1.7 is the end of life and should no longer be used: http://www.oracle.com/technetwork/java/eol-135779.html#Java6-end-public-updates

Answer 2

You need to run and compile your application on the 1.8 version of Java.

For Eclipse you should:

1) click "Window> Preferences", and in the window that appears on the left, select "Java", click "Installed JREs", click "Add ...", go to the folder containing the JDK.

2) Right-click on the project and select "Properties" on the left side of the window, click on "Java Compiler" and uncheck "Use compliance from the runtime on the Java build path", which allows you to choose from the "Compiler Compilation" list use the same The version you installed in the previous step.

for NetBeans IDE, right-click the project and select “Properties”, then go to sources, then you can change the source / binary format to upper JDK version.