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java.util.concurrent.RejectedExecutionException: null	at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:1774)	at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:768)	at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:656)	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:78)	at com.datastax.driver.core.ControlConnection.onDown(ControlConnection.java:429)	at com.datastax.driver.core.Cluster$Manager.onDown(Cluster.java:630)	at com.datastax.driver.core.Host$HealthMonitor.setDown(Host.java:178)	at com.datastax.driver.core.Host$HealthMonitor.signalConnectionFailure(Host.java:195)	at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:172)	at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:86)	at com.datastax.driver.core.Cluster$Manager.(Cluster.java:548)	at com.datastax.driver.core.Cluster$Manager.(Cluster.java:503)	at com.datastax.driver.core.Cluster.(Cluster.java:66)	at com.datastax.driver.core.Cluster.buildFrom(Cluster.java:94)	at com.datastax.driver.core.Cluster$Builder.build(Cluster.java:484)	at com.datastax.driver.core.ExceptionsTest.noHostAvailableException(ExceptionsTest.java:180)