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javax.management.InstanceAlreadyExistsException: com.datastax.driver.core:type=Errors,name=write-timeouts	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:513)	at org.jboss.as.jmx.PluggableMBeanServerImpl$TcclMBeanServer.registerMBean(PluggableMBeanServerImpl.java:551)	at org.jboss.as.jmx.PluggableMBeanServerImpl.registerMBean(PluggableMBeanServerImpl.java:319)	at com.yammer.metrics.reporting.JmxReporter.registerBean(JmxReporter.java:451)	at com.yammer.metrics.reporting.JmxReporter.processCounter(JmxReporter.java:409)	at com.yammer.metrics.reporting.JmxReporter.processCounter(JmxReporter.java:16)	at com.yammer.metrics.core.Counter.processWith(Counter.java:65)	at com.yammer.metrics.reporting.JmxReporter.onMetricAdded(JmxReporter.java:386)	at com.yammer.metrics.core.MetricsRegistry.addListener(MetricsRegistry.java:442)	at com.yammer.metrics.reporting.JmxReporter.start(JmxReporter.java:446)	at com.datastax.driver.core.Metrics.(Metrics.java:76)	at com.datastax.driver.core.Cluster$Manager.(Cluster.java:544)	at com.datastax.driver.core.Cluster$Manager.(Cluster.java:503)	at com.datastax.driver.core.Cluster.(Cluster.java:65)	at com.datastax.driver.core.Cluster.buildFrom(Cluster.java:93)	at com.datastax.driver.core.Cluster$Builder.build(Cluster.java:484)	at com.xxxxxx.xxx.dao.utils.PersistentUnit$CCluster.(PersistentUnit.java:423)	at com.xxxxxx.xxx.dao.utils.PersistentUnit$CCluster.create(PersistentUnit.java:408)	at com.xxxxxx.xxx.dao.utils.PersistentUnit.buildCluster(PersistentUnit.java:85)	at com.xxxxxx.xxx.dao.utils.PersistentUnit.getSession(PersistentUnit.java:96)	at com.xxxxxx.xxx.dao.utils.PersistentUnit.getSession(PersistentUnit.java:126)	at com.xxxxxx.xxx.dao.repository.AbstractRepository.(AbstractRepository.java:108)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:266)