jedis报LinkageError错误：javax/management/MBeanServer
使用jedis客户端时，遇到下面异常信息：
Horrible Exception: java.lang.LinkageError: loading constraint violation: loader "com/ibm/ws/classloader/CompoundClassLoader@6a36fae" previously initiated loading for a different type with name "javax/management/MBeanServer" defined by loader "com/ibm/oti/vm/BootstrapClassLoader@7853887" at java.lang.ClassLoader.defineClassImpl(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:262) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:69) at com.ibm.ws.classloader.CompoundClassLoader._defineClass(CompoundClassLoader.java:829) at com.ibm.ws.classloader.CompoundClassLoader.localFindClass(CompoundClassLoader.java:744) at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:585) at java.lang.ClassLoader.loadClass(ClassLoader.java:627) at org.apache.commons.pool2.impl.BaseGenericObjectPool.jmxRegister(BaseGenericObjectPool.java:947) at org.apache.commons.pool2.impl.BaseGenericObjectPool.(BaseGenericObjectPool.java:132) at org.apache.commons.pool2.impl.GenericObjectPool. (GenericObjectPool.java:107) at redis.clients.util.Pool.initPool(Pool.java:43) at redis.clients.util.Pool. (Pool.java:31) at redis.clients.jedis.JedisPool. (JedisPool.java:80) at redis.clients.jedis.JedisClusterInfoCache.setNodeIfNotExist(JedisClusterInfoCache.java:107) at redis.clients.jedis.JedisClusterInfoCache.discoverClusterNodesAndSlots(JedisClusterInfoCache.java:54) at redis.clients.jedis.JedisClusterConnectionHandler.initializeSlotsCache(JedisClusterConnectionHandler.java:39) at redis.clients.jedis.JedisClusterConnectionHandler. (JedisClusterConnectionHandler.java:28) at redis.clients.jedis.JedisSlotBasedConnectionHandler. (JedisSlotBasedConnectionHandler.java:21) at redis.clients.jedis.JedisSlotBasedConnectionHandler. (JedisSlotBasedConnectionHandler.java:16) at redis.clients.jedis.BinaryJedisCluster. (BinaryJedisCluster.java:39) at redis.clients.jedis.JedisCluster. (JedisCluster.java:45) at redis.clients.jedis.JedisCluster. (JedisCluster.java:32) at com.hc360.redis.util.RedisConnection.createCluster(RedisConnection.java:65) at com.hc360.redis.RedisClusterClient. (RedisClusterClient.java:26) at java.lang.J9VMInternals.initializeImpl(Native Method) at java.lang.J9VMInternals.initialize(J9VMInternals.java:233) at com.hc360.my.modules.screens.corcenter.company.morelogin.doBuildTemplate(morelogin.java:104) at com.hc360.my.common.secure.MyLogSecureScreen.doBuildTemplate(MyLogSecureScreen.java:64) at org.apache.turbine.modules.screens.TemplateScreen.doBuild(TemplateScreen.java:100) at org.apache.turbine.modules.Screen.build(Screen.java:57) at org.apache.turbine.modules.ScreenLoader.eval(ScreenLoader.java:107) at org.apache.turbine.modules.layouts.VelocityOnlyLayout.doBuild(VelocityOnlyLayout.java:93) at org.apache.turbine.modules.Layout.build(Layout.java:53) at org.apache.turbine.modules.LayoutLoader.exec(LayoutLoader.java:101) at org.apache.turbine.modules.pages.DefaultPage.doBuild(DefaultPage.java:146) at org.apache.turbine.modules.Page.build(Page.java:53) at org.apache.turbine.modules.PageLoader.exec(PageLoader.java:101) at org.apache.turbine.Turbine.doGet(Turbine.java:799) at javax.servlet.http.HttpServlet.service(HttpServlet.java:575) at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1214) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:774) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:456) at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.invokeTarget(WebAppFilterChain.java:125) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:92) at com.hc360.waf.filter.WafFilter.doFilter(WafFilter.java:87) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:192) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:89) at com.hc360.security.authz.SecurityFilter.doFilter(SecurityFilter.java:161) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:192) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:89) at com.hc360.my.common.filter.ScriptFilter.doFilter(ScriptFilter.java:58) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:192) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:89) at com.hc360.my.common.filter.InjectRefuseFilter.doFilter(InjectRefuseFilter.java:58) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:192) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:89) at com.hc360.mmt.j2ee.conf.PersistenceSessionFilter.doFilter(PersistenceSessionFilter.java:73) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:192) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:89) at com.hc360.sso.client.SSOFilter.doFilter(SSOFilter.java:674) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:192) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:89) at com.hc360.my.common.filter.CharSetFilter.doFilter(CharSetFilter.java:42) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:192) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:89) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:926) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1023) at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3703) at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:304) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:962) at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:195) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:452) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:511) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.proce***equest(HttpInboundLink.java:305) at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83) at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165) at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217) at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161) at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138) at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204) at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775) at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1659)
工程部署在websphere中，很明显类加载冲突：
Horrible Exception: java.lang.LinkageError: loading constraint violation: loader "com/ibm/ws/classloader/CompoundClassLoader@6a36fae" previously initiated loading for a different type with name "javax/management/MBeanServer" defined by loader "com/ibm/oti/vm/BootstrapClassLoader@7853887"
在工程中搜索javax/management/MBeanServer，发现在jdk的rt.jar包中和jboss-jmx.jar中出现了相同的类；
想不明白为什么jboss-jmx.jar中会出现跟jdk同样的类，但都在使用，也不能添加一个功能而牺牲别的功能；
有一个疑问，以前工程中就存在这个包了，为什么没有报错呢？而现在咋就报了呢？
猜测以前没有使用到该类！
那无疑jedis中使用到了该类javax/management/MBeanServer，显然这个类是jmx的，在使用redis中，我也不需要这个功能，是否可以去掉呢？
查看源码发现，JedisCluster创建实例时，可以传递配置信息，配置信息中可以设置是否使用jmx，只要设为false即可：
GenericObjectPoolConfig copc = new GenericObjectPoolConfig(); copc.setJmxEnabled(false); jedisCluster = new JedisCluster(clusterNodes,3000,1000,copc);