title: NoHostAvailableException with 1000 concurrent request to Cassandra with DataStax Java Driver
body: <p><strong>The setup:</strong></p>
  
  <p>-2-node Cassandra 2.0.7.31 cluster <br>
  -replicas=1<br>
  -With default configuration<br>
  -Using DataStax java driver 1.0<br></p>
  
  <p><strong>Activity</strong>
  Simple insert query using QueyBuilder class</p>
  
  <p><strong>Result</strong></p>
  
  <pre><code>com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /10.181.13.239 ([/10.181.13.239] Unexpected exception triggered))
              at com.datastax.driver.core.exceptions.NoHostAvailableException.copy(NoHostAvailableException.java:64)
              at com.datastax.driver.core.ResultSetFuture.extractCauseFromExecutionException(ResultSetFuture.java:214)
              at com.datastax.driver.core.ResultSetFuture.getUninterruptibly(ResultSetFuture.java:169)
              at com.jpmc.es.rtm.storage.impl.EventExtract.main(EventExtract.java:36)
              at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
              at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
              at java.lang.reflect.Method.invoke(Method.java:601)
              at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
  Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /10.181.13.239 ([/10.181.13.239] Unexpected exception triggered))
              at com.datastax.driver.core.RequestHandler.sendRequest(RequestHandler.java:98)
              at com.datastax.driver.core.RequestHandler$1.run(RequestHandler.java:165)
              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
  </code></pre>