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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
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   * Unless required by applicable law or agreed to in writing, software
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.distributed.test.hostreplacement;
  
  import java.io.IOException;
  import java.time.Duration;
  import java.util.Arrays;
  import java.util.List;
  
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.ConsistencyLevel;
  import org.apache.cassandra.distributed.api.Feature;
  import org.apache.cassandra.distributed.api.IInvokableInstance;
  import org.apache.cassandra.distributed.api.SimpleQueryResult;
  import org.apache.cassandra.distributed.api.TokenSupplier;
  import org.apache.cassandra.distributed.test.TestBaseImpl;
  
  import static org.apache.cassandra.config.CassandraRelevantProperties.BOOTSTRAP_SKIP_SCHEMA_CHECK;
  import static org.apache.cassandra.distributed.shared.ClusterUtils.assertRingIs;
  import static org.apache.cassandra.distributed.shared.ClusterUtils.assertRingState;
  import static org.apache.cassandra.distributed.shared.ClusterUtils.awaitRingHealthy;
  import static org.apache.cassandra.distributed.shared.ClusterUtils.awaitRingJoin;
  import static org.apache.cassandra.distributed.shared.ClusterUtils.replaceHostAndStart;
  import static org.apache.cassandra.distributed.shared.ClusterUtils.stopAbrupt;
  import static org.apache.cassandra.distributed.test.hostreplacement.HostReplacementTest.setupCluster;
  import static org.apache.cassandra.distributed.test.hostreplacement.HostReplacementTest.validateRows;
  import static org.apache.cassandra.utils.Clock.Global.nanoTime;
  
  public class HostReplacementAbruptDownedInstanceTest extends TestBaseImpl
  {
      private static final Logger logger = LoggerFactory.getLogger(HostReplacementAbruptDownedInstanceTest.class);
  
      /**
       * Can we maybe also test with an abrupt shutdown, that is when the shutdown state is not broadcast and the node to be replaced is on NORMAL state?
       */
      @Test
      public void hostReplaceAbruptShutdown() throws IOException
      {
          int numStartNodes = 3;
          TokenSupplier even = TokenSupplier.evenlyDistributedTokens(numStartNodes);
          try (Cluster cluster = Cluster.build(numStartNodes)
                                        .withConfig(c -> c.with(Feature.GOSSIP, Feature.NETWORK))
                                        .withTokenSupplier(node -> even.token(node == (numStartNodes + 1) ? 2 : node))
                                        .start())
          {
              IInvokableInstance seed = cluster.get(1);
              IInvokableInstance nodeToRemove = cluster.get(2);
              IInvokableInstance peer = cluster.get(3);
              List<IInvokableInstance> peers = Arrays.asList(seed, peer);
  
              setupCluster(cluster);
  
              // collect rows/tokens to detect issues later on if the state doesn't match
              SimpleQueryResult expectedState = nodeToRemove.coordinator().executeWithResult("SELECT * FROM " + KEYSPACE + ".tbl", ConsistencyLevel.ALL);
  
              stopAbrupt(cluster, nodeToRemove);
  
              // at this point node 2 should still be NORMAL on all other nodes
              peers.forEach(p -> assertRingState(p, nodeToRemove, "Normal"));
  
              // node is down, but queries should still work
              //TODO failing, but shouldn't!
  //            peers.forEach(p -> validateRows(p.coordinator(), expectedState));
  
              // now create a new node to replace the other node
              long startNanos = nanoTime();
              IInvokableInstance replacingNode = replaceHostAndStart(cluster, nodeToRemove, properties -> {
                  // since node2 was killed abruptly its possible that node2's gossip state has an old schema version
                  // if this happens then bootstrap will fail waiting for a schema version it will never see; to avoid
                  // this, setting this property to log the warning rather than fail bootstrap
                  properties.set(BOOTSTRAP_SKIP_SCHEMA_CHECK, true);
              });
              logger.info("Host replacement of {} with {} took {}", nodeToRemove, replacingNode, Duration.ofNanos(nanoTime() - startNanos));
              peers.forEach(p -> awaitRingJoin(p, replacingNode));
  
              // make sure all nodes are healthy
              awaitRingHealthy(seed);
  
              List<IInvokableInstance> expectedRing = Arrays.asList(seed, peer, replacingNode);
              expectedRing.forEach(p -> assertRingIs(p, expectedRing));
  
              expectedRing.forEach(p -> validateRows(p.coordinator(), expectedState));
          }
      }
  }
  