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javax.management.InstanceAlreadyExistsException: org.mongodb.driver:type=ConnectionPool,clusterId=3,host=localhost,port=27017	at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)	at com.mongodb.util.management.jmx.JMXMBeanServer.registerMBean(JMXMBeanServer.java:59)	at com.mongodb.JMXConnectionPoolListener.connectionPoolOpened(JMXConnectionPoolListener.java:52)	at com.mongodb.PooledConnectionProvider.(PooledConnectionProvider.java:60)	at com.mongodb.DefaultClusterableServerFactory.create(DefaultClusterableServerFactory.java:50)	at com.mongodb.BaseCluster.createServer(BaseCluster.java:202)	at com.mongodb.SingleServerCluster.(SingleServerCluster.java:45)	at com.mongodb.Clusters.create(Clusters.java:37)	at com.mongodb.DBTCPConnector.start(DBTCPConnector.java:75)	at com.mongodb.Mongo.(Mongo.java:346)	at com.mongodb.Mongo.(Mongo.java:327)	at com.mongodb.MongoClient.(MongoClient.java:268)	at com.mongodb.Mongo$Holder.connect(Mongo.java:782)